# tzdb data for Europe and environs # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. # This file is by no means authoritative; if you think you know better, # go ahead and edit the file (and please send any changes to # tz@iana.org for general use in the future). For more, please see # the file CONTRIBUTING in the tz distribution. # From Paul Eggert (2017-02-10): # # Unless otherwise specified, the source for data through 1990 is: # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), # San Diego: ACS Publications, Inc. (2003). # Unfortunately this book contains many errors and cites no sources. # # Many years ago Gwillim Law wrote that a good source # for time zone data was the International Air Transport # Association's Standard Schedules Information Manual (IATA SSIM), # published semiannually. Law sent in several helpful summaries # of the IATA's data after 1990. Except where otherwise noted, # IATA SSIM is the source for entries after 1990. # # A reliable and entertaining source about time zones is # Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). # # Except where otherwise noted, Shanks & Pottenger is the source for # entries through 1991, and IATA SSIM is the source for entries afterwards. # # Other sources occasionally used include: # # Edward W. Whitman, World Time Differences, # Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), # which I found in the UCLA library. # # William Willett, The Waste of Daylight, 19th edition # # [PDF] (1914-03) # # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 # . He writes: # "It is requested that corrections and additions to these tables # may be sent to Mr. John Milne, Royal Geographical Society, # Savile Row, London." Nowadays please email them to tz@iana.org. # # Byalokoz EL. New Counting of Time in Russia since July 1, 1919. # This Russian-language source was consulted by Vladimir Karpinsky; see # https://mm.icann.org/pipermail/tz/2014-August/021320.html # The full Russian citation is: # Бялокоз, Евгений Людвигович. Новый счет времени в течении суток # введенный декретом Совета народных комиссаров для всей России с 1-го # июля 1919 г. / Изд. 2-е Междуведомственной комиссии. - Петроград: # Десятая гос. тип., 1919. # http://resolver.gpntb.ru/purl?docushare/dsweb/Get/Resource-2011/Byalokoz__E.L.__Novyy__schet__vremeni__v__techenie__sutok__izd__2(1).pdf # # Brazil's Divisão Serviço da Hora (DSHO), # History of Summer Time # # (1998-09-21, in Portuguese) # # I invented the abbreviations marked '*' in the following table; # the rest are variants of the "xMT" pattern for a city's mean time, # or are from other sources. Corrections are welcome! # std dst 2dst # LMT Local Mean Time # -4:00 AST ADT Atlantic # 0:00 GMT BST BDST Greenwich, British Summer # 0:00 GMT IST Greenwich, Irish Summer # 0:00 WET WEST WEMT Western Europe # 1:00 BST British Standard (1968-1971) # 1:00 IST GMT Irish Standard (1968-) with winter DST # 1:00 CET CEST CEMT Central Europe # 1:00:14 SET Swedish (1879-1899) # 1:36:34 RMT* LST* Riga, Latvian Summer (1880-1926)* # 2:00 EET EEST Eastern Europe # 3:00 MSK MSD MDST* Moscow # From Peter Ilieve (1994-12-04), re EEC/EC/EU members: # The original six: Belgium, France, (West) Germany, Italy, # Luxembourg, the Netherlands. # Plus, from 1 Jan 73: Denmark, Ireland, United Kingdom. # Plus, from 1 Jan 81: Greece. # Plus, from 1 Jan 86: Spain, Portugal. # Plus, from 1 Jan 95: Austria, Finland, Sweden. (Norway negotiated terms for # entry but in a referendum on 28 Nov 94 the people voted No by 52.2% to 47.8% # on a turnout of 88.6%. This was almost the same result as Norway's previous # referendum in 1972, they are the only country to have said No twice. # Referendums in the other three countries voted Yes.) # ... # Estonia ... uses EU dates but not at 01:00 GMT, they use midnight GMT. # I don't think they know yet what they will do from 1996 onwards. # ... # There shouldn't be any [current members who are not using EU rules]. # A Directive has the force of law, member states are obliged to enact # national law to implement it. The only contentious issue was the # different end date for the UK and Ireland, and this was always allowed # in the Directive. ############################################################################### # Britain (United Kingdom) and Ireland (Eire) # From Peter Ilieve (1994-07-06): # # On 17 Jan 1994 the Independent, a UK quality newspaper, had a piece about # historical vistas along the Thames in west London. There was a photo # and a sketch map showing some of the sightlines involved. One paragraph # of the text said: # # 'An old stone obelisk marking a forgotten terrestrial meridian stands # beside the river at Kew. In the 18th century, before time and longitude # was standardised by the Royal Observatory in Greenwich, scholars observed # this stone and the movement of stars from Kew Observatory nearby. They # made their calculations and set the time for the Horse Guards and Parliament, # but now the stone is obscured by scrubwood and can only be seen by walking # along the towpath within a few yards of it.' # # I have a one inch to one mile map of London and my estimate of the stone's # position is 51° 28' 30" N, 0° 18' 45" W. The longitude should # be within about ±2". The Ordnance Survey grid reference is TQ172761. # # [This yields STDOFF = -0:01:15 for London LMT in the 18th century.] # From Paul Eggert (1993-11-18): # # Howse writes that Britain was the first country to use standard time. # The railways cared most about the inconsistencies of local mean time, # and it was they who forced a uniform time on the country. # The original idea was credited to Dr. William Hyde Wollaston (1766-1828) # and was popularized by Abraham Follett Osler (1808-1903). # The first railway to adopt London time was the Great Western Railway # in November 1840; other railways followed suit, and by 1847 most # (though not all) railways used London time. On 1847-09-22 the # Railway Clearing House, an industry standards body, recommended that GMT be # adopted at all stations as soon as the General Post Office permitted it. # The transition occurred on 12-01 for the L&NW, the Caledonian, # and presumably other railways; the January 1848 Bradshaw's lists many # railways as using GMT. By 1855 the vast majority of public # clocks in Britain were set to GMT (though some, like the great clock # on Tom Tower at Christ Church, Oxford, were fitted with two minute hands, # one for local time and one for GMT). The last major holdout was the legal # system, which stubbornly stuck to local time for many years, leading # to oddities like polls opening at 08:13 and closing at 16:13. # The legal system finally switched to GMT when the Statutes (Definition # of Time) Act took effect; it received the Royal Assent on 1880-08-02. # # In the tables below, we condense this complicated story into a single # transition date for London, namely 1847-12-01. We don't know as much # about Dublin, so we use 1880-08-02, the legal transition time. # From Paul Eggert (2014-07-19): # The ancients had no need for daylight saving, as they kept time # informally or via hours whose length depended on the time of year. # Daylight saving time in its modern sense was invented by the # New Zealand entomologist George Vernon Hudson (1867-1946), # whose day job as a postal clerk led him to value # after-hours daylight in which to pursue his research. # In 1895 he presented a paper to the Wellington Philosophical Society # that proposed a two-hour daylight-saving shift. See: # Hudson GV. On seasonal time-adjustment in countries south of lat. 30°. # Transactions and Proceedings of the New Zealand Institute. 1895;28:734 # http://rsnz.natlib.govt.nz/volume/rsnz_28/rsnz_28_00_006110.html # Although some interest was expressed in New Zealand, his proposal # did not find its way into law and eventually it was almost forgotten. # # In England, DST was independently reinvented by William Willett (1857-1915), # a London builder and member of the Royal Astronomical Society # who circulated a pamphlet "The Waste of Daylight" (1907) # that proposed advancing clocks 20 minutes on each of four Sundays in April, # and retarding them by the same amount on four Sundays in September. # A bill was drafted in 1909 and introduced in Parliament several times, # but it met with ridicule and opposition, especially from farming interests. # Later editions of the pamphlet proposed one-hour summer time, and # it was eventually adopted as a wartime measure in 1916. # See: Summer Time Arrives Early, The Times (2000-05-18). # A monument to Willett was unveiled on 1927-05-21, in an open space in # a 45-acre wood near Chislehurst, Kent that was purchased by popular # subscription and open to the public. On the south face of the monolith, # designed by G. W. Miller, is the William Willett Memorial Sundial, # which is permanently set to Summer Time. # From Winston Churchill (1934-04-28): # It is one of the paradoxes of history that we should owe the boon of # summer time, which gives every year to the people of this country # between 160 and 170 hours more daylight leisure, to a war which # plunged Europe into darkness for four years, and shook the # foundations of civilization throughout the world. # -- "A Silent Toast to William Willett", Pictorial Weekly; # republished in Finest Hour (Spring 2002) 1(114):26 # https://www.winstonchurchill.org/publications/finest-hour/finest-hour-114/a-silent-toast-to-william-willett-by-winston-s-churchill # From Paul Eggert (2015-08-08): # The OED Supplement says that the English originally said "Daylight Saving" # when they were debating the adoption of DST in 1908; but by 1916 this # term appears only in quotes taken from DST's opponents, whereas the # proponents (who eventually won the argument) are quoted as using "Summer". # The term "Summer Time" was introduced by Herbert Samuel, Home Secretary; see: # Viscount Samuel. Leisure in a Democracy. Cambridge University Press # ISBN 978-1-107-49471-8 (1949, reissued 2015), p 8. # From Arthur David Olson (1989-01-19): # A source at the British Information Office in New York avers that it's # known as "British" Summer Time in all parts of the United Kingdom. # Date: 4 Jan 89 08:57:25 GMT (Wed) # From: Jonathan Leffler # [British Summer Time] is fixed annually by Act of Parliament. # If you can predict what Parliament will do, you should be in # politics making a fortune, not computing. # From Chris Carrier (1996-06-14): # I remember reading in various wartime issues of the London Times the # acronym BDST for British Double Summer Time. Look for the published # time of sunrise and sunset in The Times, when BDST was in effect, and # if you find a zone reference it will say, "All times B.D.S.T." # From Joseph S. Myers (1999-09-02): # ... some military cables (WO 219/4100 - this is a copy from the # main SHAEF archives held in the US National Archives, SHAEF/5252/8/516) # agree that the usage is BDST (this appears in a message dated 17 Feb 1945). # From Joseph S. Myers (2000-10-03): # On 18th April 1941, Sir Stephen Tallents of the BBC wrote to Sir # Alexander Maxwell of the Home Office asking whether there was any # official designation; the reply of the 21st was that there wasn't # but he couldn't think of anything better than the "Double British # Summer Time" that the BBC had been using informally. # https://www.polyomino.org.uk/british-time/bbc-19410418.png # https://www.polyomino.org.uk/british-time/ho-19410421.png # From Sir Alexander Maxwell in the above-mentioned letter (1941-04-21): # [N]o official designation has as far as I know been adopted for the time # which is to be introduced in May.... # I cannot think of anything better than "Double British Summer Time" # which could not be said to run counter to any official description. # From Paul Eggert (2000-10-02): # Howse writes (p 157) 'DBST' too, but 'BDST' seems to have been common # and follows the more usual convention of putting the location name first, # so we use 'BDST'. # Peter Ilieve (1998-04-19) described at length # the history of summer time legislation in the United Kingdom. # Since 1998 Joseph S. Myers has been updating # and extending this list, which can be found in # https://www.polyomino.org.uk/british-time/ # From Joseph S. Myers (1998-01-06): # # The legal time in the UK outside of summer time is definitely GMT, not UTC; # see Lord Tanlaw's speech # https://www.publications.parliament.uk/pa/ld199798/ldhansrd/vo970611/text/70611-10.htm#70611-10_head0 # (Lords Hansard 11 June 1997 columns 964 to 976). # From Paul Eggert (2006-03-22): # # For lack of other data, follow Shanks & Pottenger for Eire in 1940-1948. # # Given Ilieve and Myers's data, the following claims by Shanks & Pottenger # are incorrect: # * Wales did not switch from GMT to daylight saving time until # 1921 Apr 3, when they began to conform with the rest of Great Britain. # Actually, Wales was identical after 1880. # * Eire had two transitions on 1916 Oct 1. # It actually just had one transition. # * Northern Ireland used single daylight saving time throughout WW II. # Actually, it conformed to Britain. # * GB-Eire changed standard time to 1 hour ahead of GMT on 1968-02-18. # Actually, that date saw the usual switch to summer time. # Standard time was not changed until 1968-10-27 (the clocks didn't change). # # Here is another incorrect claim by Shanks & Pottenger: # * Jersey, Guernsey, and the Isle of Man did not switch from GMT # to daylight saving time until 1921 Apr 3, when they began to # conform with Great Britain. # S.R.&O. 1916, No. 382 and HO 45/10811/312364 (quoted above) say otherwise. # # The following claim by Shanks & Pottenger is possible though doubtful; # we'll ignore it for now. # * Dublin's 1971-10-31 switch was at 02:00, even though London's was 03:00. # From Paul Eggert (2017-12-04): # # Dunsink Observatory (8 km NW of Dublin's center) was to Dublin as # Greenwich was to London. For example: # # "Timeball on the ballast office is down. Dunsink time." # -- James Joyce, Ulysses # # The abbreviation DMT stood for "Dublin Mean Time" or "Dunsink Mean Time"; # this being Ireland, opinions differed. # # Whitman says Dublin/Dunsink Mean Time was UT-00:25:21, which agrees # with measurements of recent visitors to the Meridian Room of Dunsink # Observatory; see Malone D. Dunsink and timekeeping. 2016-01-24. # . Malone # writes that the Nautical Almanac listed UT-00:25:22 until 1896, when # it moved to UT-00:25:21.1 (I confirmed that the 1893 edition used # the former and the 1896 edition used the latter). Evidently the # news of this change propagated slowly, as Milne 1899 still lists # UT-00:25:22 and cites the International Telegraph Bureau. As it is # not clear that there was any practical significance to the change # from UT-00:25:22 to UT-00:25:21.1 in civil timekeeping, omit this # transition for now and just use the latter value. # "Countess Markievicz ... claimed that the [1916] abolition of Dublin Mean Time # was among various actions undertaken by the 'English' government that # would 'put the whole country into the SF (Sinn Féin) camp'. She claimed # Irish 'public feeling (was) outraged by forcing of English time on us'." # -- Parsons M. Dublin lost its time zone - and 25 minutes - after 1916 Rising. # Irish Times 2014-10-27. # https://www.irishtimes.com/news/politics/dublin-lost-its-time-zone-and-25-minutes-after-1916-rising-1.1977411 # From Joseph S. Myers (2005-01-26): # Irish laws are available online at . # These include various relating to legal time, for example: # # ZZA13Y1923.html ZZA12Y1924.html ZZA8Y1925.html ZZSIV20PG1267.html # # ZZSI71Y1947.html ZZSI128Y1948.html ZZSI23Y1949.html ZZSI41Y1950.html # ZZSI27Y1951.html ZZSI73Y1952.html # # ZZSI11Y1961.html ZZSI232Y1961.html ZZSI182Y1962.html # ZZSI167Y1963.html ZZSI257Y1964.html ZZSI198Y1967.html # ZZA23Y1968.html ZZA17Y1971.html # # ZZSI67Y1981.html ZZSI212Y1982.html ZZSI45Y1986.html # ZZSI264Y1988.html ZZSI52Y1990.html ZZSI371Y1992.html # ZZSI395Y1994.html ZZSI484Y1997.html ZZSI506Y2001.html # # [These are all relative to the root, e.g., the first is # .] # # (These are those I found, but there could be more. In any case these # should allow various updates to the comments in the europe file to cover # the laws applicable in Ireland.) # # (Note that the time in the Republic of Ireland since 1968 has been defined # in terms of standard time being GMT+1 with a period of winter time when it # is GMT, rather than standard time being GMT with a period of summer time # being GMT+1.) # From Paul Eggert (1999-03-28): # Clive Feather (, 1997-03-31) # reports that Folkestone (Cheriton) Shuttle Terminal uses Concession Time # (CT), equivalent to French civil time. # Julian Hill (, 1998-09-30) reports that # trains between Dollands Moor (the freight facility next door) # and Frethun run in CT. # My admittedly uninformed guess is that the terminal has two authorities, # the French concession operators and the British civil authorities, # and that the time depends on who you're talking to. # If, say, the British police were called to the station for some reason, # I would expect the official police report to use GMT/BST and not CET/CEST. # This is a borderline case, but for now let's stick to GMT/BST. # From an anonymous contributor (1996-06-02): # The law governing time in Ireland is under Statutory Instrument SI 395/94, # which gives force to European Union 7th Council Directive No. 94/21/EC. # Under this directive, the Minister for Justice in Ireland makes appropriate # regulations. I spoke this morning with the Secretary of the Department of # Justice (tel +353 1 678 9711) who confirmed to me that the correct name is # "Irish Summer Time", abbreviated to "IST". # # From Paul Eggert (2017-12-07): # The 1996 anonymous contributor's goal was to determine the correct # abbreviation for summer time in Dublin and so the contributor # focused on the "IST", not on the "Irish Summer Time". Though the # "IST" was correct, the "Irish Summer Time" appears to have been an # error, as Ireland's Standard Time (Amendment) Act, 1971 states that # standard time in Ireland remains at UT +01 and is observed in # summer, and that Greenwich mean time is observed in winter. (Thanks # to Derick Rethans for pointing out the error.) That is, when # Ireland amended the 1968 act that established UT +01 as Irish # Standard Time, it left standard time unchanged and established GMT # as a negative daylight saving time in winter. So, in this database # IST stands for Irish Summer Time for timestamps before 1968, and for # Irish Standard Time after that. See: # http://www.irishstatutebook.ie/eli/1971/act/17/enacted/en/print # Michael Deckers (2017-06-01) gave the following URLs for Ireland's # Summer Time Act, 1925 and Summer Time Orders, 1926 and 1947: # http://www.irishstatutebook.ie/eli/1925/act/8/enacted/en/print # http://www.irishstatutebook.ie/eli/1926/sro/919/made/en/print # http://www.irishstatutebook.ie/eli/1947/sro/71/made/en/print # Rule NAME FROM TO - IN ON AT SAVE LETTER/S # Summer Time Act, 1916 Rule GB-Eire 1916 only - May 21 2:00s 1:00 BST Rule GB-Eire 1916 only - Oct 1 2:00s 0 GMT # S.R.&O. 1917, No. 358 Rule GB-Eire 1917 only - Apr 8 2:00s 1:00 BST Rule GB-Eire 1917 only - Sep 17 2:00s 0 GMT # S.R.&O. 1918, No. 274 Rule GB-Eire 1918 only - Mar 24 2:00s 1:00 BST Rule GB-Eire 1918 only - Sep 30 2:00s 0 GMT # S.R.&O. 1919, No. 297 Rule GB-Eire 1919 only - Mar 30 2:00s 1:00 BST Rule GB-Eire 1919 only - Sep 29 2:00s 0 GMT # S.R.&O. 1920, No. 458 Rule GB-Eire 1920 only - Mar 28 2:00s 1:00 BST # S.R.&O. 1920, No. 1844 Rule GB-Eire 1920 only - Oct 25 2:00s 0 GMT # S.R.&O. 1921, No. 363 Rule GB-Eire 1921 only - Apr 3 2:00s 1:00 BST Rule GB-Eire 1921 only - Oct 3 2:00s 0 GMT # S.R.&O. 1922, No. 264 Rule GB-Eire 1922 only - Mar 26 2:00s 1:00 BST Rule GB-Eire 1922 only - Oct 8 2:00s 0 GMT # The Summer Time Act, 1922 Rule GB-Eire 1923 only - Apr Sun>=16 2:00s 1:00 BST Rule GB-Eire 1923 1924 - Sep Sun>=16 2:00s 0 GMT Rule GB-Eire 1924 only - Apr Sun>=9 2:00s 1:00 BST Rule GB-Eire 1925 1926 - Apr Sun>=16 2:00s 1:00 BST # The Summer Time Act, 1925 Rule GB-Eire 1925 1938 - Oct Sun>=2 2:00s 0 GMT Rule GB-Eire 1927 only - Apr Sun>=9 2:00s 1:00 BST Rule GB-Eire 1928 1929 - Apr Sun>=16 2:00s 1:00 BST Rule GB-Eire 1930 only - Apr Sun>=9 2:00s 1:00 BST Rule GB-Eire 1931 1932 - Apr Sun>=16 2:00s 1:00 BST Rule GB-Eire 1933 only - Apr Sun>=9 2:00s 1:00 BST Rule GB-Eire 1934 only - Apr Sun>=16 2:00s 1:00 BST Rule GB-Eire 1935 only - Apr Sun>=9 2:00s 1:00 BST Rule GB-Eire 1936 1937 - Apr Sun>=16 2:00s 1:00 BST Rule GB-Eire 1938 only - Apr Sun>=9 2:00s 1:00 BST Rule GB-Eire 1939 only - Apr Sun>=16 2:00s 1:00 BST # S.R.&O. 1939, No. 1379 Rule GB-Eire 1939 only - Nov Sun>=16 2:00s 0 GMT # S.R.&O. 1940, No. 172 and No. 1883 Rule GB-Eire 1940 only - Feb Sun>=23 2:00s 1:00 BST # S.R.&O. 1941, No. 476 Rule GB-Eire 1941 only - May Sun>=2 1:00s 2:00 BDST Rule GB-Eire 1941 1943 - Aug Sun>=9 1:00s 1:00 BST # S.R.&O. 1942, No. 506 Rule GB-Eire 1942 1944 - Apr Sun>=2 1:00s 2:00 BDST # S.R.&O. 1944, No. 932 Rule GB-Eire 1944 only - Sep Sun>=16 1:00s 1:00 BST # S.R.&O. 1945, No. 312 Rule GB-Eire 1945 only - Apr Mon>=2 1:00s 2:00 BDST Rule GB-Eire 1945 only - Jul Sun>=9 1:00s 1:00 BST # S.R.&O. 1945, No. 1208 Rule GB-Eire 1945 1946 - Oct Sun>=2 2:00s 0 GMT Rule GB-Eire 1946 only - Apr Sun>=9 2:00s 1:00 BST # The Summer Time Act, 1947 Rule GB-Eire 1947 only - Mar 16 2:00s 1:00 BST Rule GB-Eire 1947 only - Apr 13 1:00s 2:00 BDST Rule GB-Eire 1947 only - Aug 10 1:00s 1:00 BST Rule GB-Eire 1947 only - Nov 2 2:00s 0 GMT # Summer Time Order, 1948 (S.I. 1948/495) Rule GB-Eire 1948 only - Mar 14 2:00s 1:00 BST Rule GB-Eire 1948 only - Oct 31 2:00s 0 GMT # Summer Time Order, 1949 (S.I. 1949/373) Rule GB-Eire 1949 only - Apr 3 2:00s 1:00 BST Rule GB-Eire 1949 only - Oct 30 2:00s 0 GMT # Summer Time Order, 1950 (S.I. 1950/518) # Summer Time Order, 1951 (S.I. 1951/430) # Summer Time Order, 1952 (S.I. 1952/451) Rule GB-Eire 1950 1952 - Apr Sun>=14 2:00s 1:00 BST Rule GB-Eire 1950 1952 - Oct Sun>=21 2:00s 0 GMT # revert to the rules of the Summer Time Act, 1925 Rule GB-Eire 1953 only - Apr Sun>=16 2:00s 1:00 BST Rule GB-Eire 1953 1960 - Oct Sun>=2 2:00s 0 GMT Rule GB-Eire 1954 only - Apr Sun>=9 2:00s 1:00 BST Rule GB-Eire 1955 1956 - Apr Sun>=16 2:00s 1:00 BST Rule GB-Eire 1957 only - Apr Sun>=9 2:00s 1:00 BST Rule GB-Eire 1958 1959 - Apr Sun>=16 2:00s 1:00 BST Rule GB-Eire 1960 only - Apr Sun>=9 2:00s 1:00 BST # Summer Time Order, 1961 (S.I. 1961/71) # Summer Time (1962) Order, 1961 (S.I. 1961/2465) # Summer Time Order, 1963 (S.I. 1963/81) Rule GB-Eire 1961 1963 - Mar lastSun 2:00s 1:00 BST Rule GB-Eire 1961 1968 - Oct Sun>=23 2:00s 0 GMT # Summer Time (1964) Order, 1963 (S.I. 1963/2101) # Summer Time Order, 1964 (S.I. 1964/1201) # Summer Time Order, 1967 (S.I. 1967/1148) Rule GB-Eire 1964 1967 - Mar Sun>=19 2:00s 1:00 BST # Summer Time Order, 1968 (S.I. 1968/117) Rule GB-Eire 1968 only - Feb 18 2:00s 1:00 BST # The British Standard Time Act, 1968 # (no summer time) # The Summer Time Act, 1972 Rule GB-Eire 1972 1980 - Mar Sun>=16 2:00s 1:00 BST Rule GB-Eire 1972 1980 - Oct Sun>=23 2:00s 0 GMT # Summer Time Order, 1980 (S.I. 1980/1089) # Summer Time Order, 1982 (S.I. 1982/1673) # Summer Time Order, 1986 (S.I. 1986/223) # Summer Time Order, 1988 (S.I. 1988/931) Rule GB-Eire 1981 1995 - Mar lastSun 1:00u 1:00 BST Rule GB-Eire 1981 1989 - Oct Sun>=23 1:00u 0 GMT # Summer Time Order, 1989 (S.I. 1989/985) # Summer Time Order, 1992 (S.I. 1992/1729) # Summer Time Order 1994 (S.I. 1994/2798) Rule GB-Eire 1990 1995 - Oct Sun>=22 1:00u 0 GMT # Summer Time Order 1997 (S.I. 1997/2982) # See EU for rules starting in 1996. # # Use Europe/London for Jersey, Guernsey, and the Isle of Man. # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Europe/London -0:01:15 - LMT 1847 Dec 1 0:00 GB-Eire %s 1968 Oct 27 1:00 - BST 1971 Oct 31 2:00u 0:00 GB-Eire %s 1996 0:00 EU GMT/BST # From Paul Eggert (2018-02-15): # In January 2018 we discovered that the negative SAVE values in the # Eire rules cause problems with tests for ICU: # https://mm.icann.org/pipermail/tz/2018-January/025825.html # and with tests for OpenJDK: # https://mm.icann.org/pipermail/tz/2018-January/025822.html # # To work around this problem, the build procedure can translate the # following data into two forms, one with negative SAVE values and the # other form with a traditional approximation for Irish timestamps # after 1971-10-31 02:00 UTC; although this approximation has tm_isdst # flags that are reversed, its UTC offsets are correct and this often # suffices.... # # The following is like GB-Eire and EU, except with standard time in # summer and negative daylight saving time in winter. It is for when # negative SAVE values are used. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Eire 1971 only - Oct 31 2:00u -1:00 - Rule Eire 1972 1980 - Mar Sun>=16 2:00u 0 - Rule Eire 1972 1980 - Oct Sun>=23 2:00u -1:00 - Rule Eire 1981 max - Mar lastSun 1:00u 0 - Rule Eire 1981 1989 - Oct Sun>=23 1:00u -1:00 - Rule Eire 1990 1995 - Oct Sun>=22 1:00u -1:00 - Rule Eire 1996 max - Oct lastSun 1:00u -1:00 - # Zone NAME STDOFF RULES FORMAT [UNTIL] #STDOFF -0:25:21.1 Zone Europe/Dublin -0:25:21 - LMT 1880 Aug 2 -0:25:21 - DMT 1916 May 21 2:00s -0:25:21 1:00 IST 1916 Oct 1 2:00s 0:00 GB-Eire %s 1921 Dec 6 # independence 0:00 GB-Eire GMT/IST 1940 Feb 25 2:00s 0:00 1:00 IST 1946 Oct 6 2:00s 0:00 - GMT 1947 Mar 16 2:00s 0:00 1:00 IST 1947 Nov 2 2:00s 0:00 - GMT 1948 Apr 18 2:00s 0:00 GB-Eire GMT/IST 1968 Oct 27 # Vanguard section, for zic and other parsers that support negative DST. 1:00 Eire IST/GMT # Rearguard section, for parsers lacking negative DST; see ziguard.awk. # 1:00 - IST 1971 Oct 31 2:00u # 0:00 GB-Eire GMT/IST 1996 # 0:00 EU GMT/IST # End of rearguard section. ############################################################################### # Europe # The following rules are for the European Union and for its # predecessor organization, the European Communities. # For brevity they are called "EU rules" elsewhere in this file. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule EU 1977 1980 - Apr Sun>=1 1:00u 1:00 S Rule EU 1977 only - Sep lastSun 1:00u 0 - Rule EU 1978 only - Oct 1 1:00u 0 - Rule EU 1979 1995 - Sep lastSun 1:00u 0 - Rule EU 1981 max - Mar lastSun 1:00u 1:00 S Rule EU 1996 max - Oct lastSun 1:00u 0 - # The most recent directive covers the years starting in 2002. See: # Directive 2000/84/EC of the European Parliament and of the Council # of 19 January 2001 on summer-time arrangements. # http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=CELEX:32000L0084:EN:NOT # W-Eur differs from EU only in that W-Eur uses standard time. Rule W-Eur 1977 1980 - Apr Sun>=1 1:00s 1:00 S Rule W-Eur 1977 only - Sep lastSun 1:00s 0 - Rule W-Eur 1978 only - Oct 1 1:00s 0 - Rule W-Eur 1979 1995 - Sep lastSun 1:00s 0 - Rule W-Eur 1981 max - Mar lastSun 1:00s 1:00 S Rule W-Eur 1996 max - Oct lastSun 1:00s 0 - # Older C-Eur rules are for convenience in the tables. # From 1977 on, C-Eur differs from EU only in that C-Eur uses standard time. Rule C-Eur 1916 only - Apr 30 23:00 1:00 S Rule C-Eur 1916 only - Oct 1 1:00 0 - Rule C-Eur 1917 1918 - Apr Mon>=15 2:00s 1:00 S Rule C-Eur 1917 1918 - Sep Mon>=15 2:00s 0 - Rule C-Eur 1940 only - Apr 1 2:00s 1:00 S Rule C-Eur 1942 only - Nov 2 2:00s 0 - Rule C-Eur 1943 only - Mar 29 2:00s 1:00 S Rule C-Eur 1943 only - Oct 4 2:00s 0 - Rule C-Eur 1944 1945 - Apr Mon>=1 2:00s 1:00 S # Whitman gives 1944 Oct 7; go with Shanks & Pottenger. Rule C-Eur 1944 only - Oct 2 2:00s 0 - # From Jesper Nørgaard Welen (2008-07-13): # # I found what is probably a typo of 2:00 which should perhaps be 2:00s # in the C-Eur rule from tz database version 2008d (this part was # corrected in version 2008d). The circumstantial evidence is simply the # tz database itself, as seen below: # # Zone Europe/Paris ... # 0:00 France WE%sT 1945 Sep 16 3:00 # # Zone Europe/Monaco ... # 0:00 France WE%sT 1945 Sep 16 3:00 # # Zone Europe/Belgrade ... # 1:00 1:00 CEST 1945 Sep 16 2:00s # # Rule France 1945 only - Sep 16 3:00 0 - # Rule Belgium 1945 only - Sep 16 2:00s 0 - # Rule Neth 1945 only - Sep 16 2:00s 0 - # # The rule line to be changed is: # # Rule C-Eur 1945 only - Sep 16 2:00 0 - # # It seems that Paris, Monaco, Rule France, Rule Belgium all agree on # 2:00 standard time, e.g. 3:00 local time. However there are no # countries that use C-Eur rules in September 1945, so the only items # affected are apparently these fictitious zones that translate acronyms # CET and MET: # # Zone CET 1:00 C-Eur CE%sT # Zone MET 1:00 C-Eur ME%sT # # It this is right then the corrected version would look like: # # Rule C-Eur 1945 only - Sep 16 2:00s 0 - # # A small step for mankind though 8-) Rule C-Eur 1945 only - Sep 16 2:00s 0 - Rule C-Eur 1977 1980 - Apr Sun>=1 2:00s 1:00 S Rule C-Eur 1977 only - Sep lastSun 2:00s 0 - Rule C-Eur 1978 only - Oct 1 2:00s 0 - Rule C-Eur 1979 1995 - Sep lastSun 2:00s 0 - Rule C-Eur 1981 max - Mar lastSun 2:00s 1:00 S Rule C-Eur 1996 max - Oct lastSun 2:00s 0 - # E-Eur differs from EU only in that E-Eur switches at midnight local time. Rule E-Eur 1977 1980 - Apr Sun>=1 0:00 1:00 S Rule E-Eur 1977 only - Sep lastSun 0:00 0 - Rule E-Eur 1978 only - Oct 1 0:00 0 - Rule E-Eur 1979 1995 - Sep lastSun 0:00 0 - Rule E-Eur 1981 max - Mar lastSun 0:00 1:00 S Rule E-Eur 1996 max - Oct lastSun 0:00 0 - # Daylight saving time for Russia and the Soviet Union # # The 1917-1921 decree URLs are from Alexander Belopolsky (2016-08-23). # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Russia 1917 only - Jul 1 23:00 1:00 MST # Moscow Summer Time # # Decree No. 142 (1917-12-22) http://istmat.info/node/28137 Rule Russia 1917 only - Dec 28 0:00 0 MMT # Moscow Mean Time # # Decree No. 497 (1918-05-30) http://istmat.info/node/30001 Rule Russia 1918 only - May 31 22:00 2:00 MDST # Moscow Double Summer Time Rule Russia 1918 only - Sep 16 1:00 1:00 MST # # Decree No. 258 (1919-05-29) http://istmat.info/node/37949 Rule Russia 1919 only - May 31 23:00 2:00 MDST # Rule Russia 1919 only - Jul 1 0:00u 1:00 MSD Rule Russia 1919 only - Aug 16 0:00 0 MSK # # Decree No. 63 (1921-02-03) http://istmat.info/node/45840 Rule Russia 1921 only - Feb 14 23:00 1:00 MSD # # Decree No. 121 (1921-03-07) http://istmat.info/node/45949 Rule Russia 1921 only - Mar 20 23:00 2:00 +05 # Rule Russia 1921 only - Sep 1 0:00 1:00 MSD Rule Russia 1921 only - Oct 1 0:00 0 - # Act No. 925 of the Council of Ministers of the USSR (1980-10-24): Rule Russia 1981 1984 - Apr 1 0:00 1:00 S Rule Russia 1981 1983 - Oct 1 0:00 0 - # Act No. 967 of the Council of Ministers of the USSR (1984-09-13), repeated in # Act No. 227 of the Council of Ministers of the USSR (1989-03-14): Rule Russia 1984 1995 - Sep lastSun 2:00s 0 - Rule Russia 1985 2010 - Mar lastSun 2:00s 1:00 S # Rule Russia 1996 2010 - Oct lastSun 2:00s 0 - # As described below, Russia's 2014 change affects Zone data, not Rule data. # From Stepan Golosunov (2016-03-07): # Wikipedia and other sources refer to the Act of the Council of # Ministers of the USSR from 1988-01-04 No. 5 and the Act of the # Council of Ministers of the USSR from 1989-03-14 No. 227. # # I did not find full texts of these acts. For the 1989 one we have # title at https://base.garant.ru/70754136/ : # "About change in calculation of time on the territories of # Lithuanian SSR, Latvian SSR and Estonian SSR, Astrakhan, # Kaliningrad, Kirov, Kuybyshev, Ulyanovsk and Uralsk oblasts". # And http://astrozet.net/files/Zones/DOC/RU/1980-925.txt appears to # contain quotes from both acts: Since last Sunday of March 1988 rules # of the second time belt are installed in Volgograd and Saratov # oblasts. Since last Sunday of March 1989: # a) Lithuanian SSR, Latvian SSR, Estonian SSR, Kaliningrad oblast: # second time belt rules without extra hour (Moscow-1); # b) Astrakhan, Kirov, Kuybyshev, Ulyanovsk oblasts: second time belt # rules (Moscow time) # c) Uralsk oblast: third time belt rules (Moscow+1). # From Stepan Golosunov (2016-03-27): # Unamended version of the act of the # Government of the Russian Federation No. 23 from 08.01.1992 # http://pravo.gov.ru/proxy/ips/?docbody=&nd=102014034&rdk=0 # says that every year clocks were to be moved forward on last Sunday # of March at 2 hours and moved backwards on last Sunday of September # at 3 hours. It was amended in 1996 to replace September with October. # From Alexander Krivenyshev (2011-06-14): # According to Kremlin press service, Russian President Dmitry Medvedev # signed a federal law "On calculation of time" on June 9, 2011. # According to the law Russia is abolishing daylight saving time. # # Medvedev signed a law "On the Calculation of Time" (in russian): # http://bmockbe.ru/events/?ID=7583 # # Medvedev signed a law on the calculation of the time (in russian): # https://www.regnum.ru/news/polit/1413906.html # From Arthur David Olson (2011-06-15): # Take "abolishing daylight saving time" to mean that time is now considered # to be standard. # Previous editions of this database used abbreviations like MET DST # for Central European Summer Time, but this didn't agree with common usage. # From Markus Kuhn (1996-07-12): # The official German names ... are # # Mitteleuropäische Zeit (MEZ) = UTC+01:00 # Mitteleuropäische Sommerzeit (MESZ) = UTC+02:00 # # as defined in the German Time Act (Gesetz über die Zeitbestimmung (ZeitG), # 1978-07-25, Bundesgesetzblatt, Jahrgang 1978, Teil I, S. 1110-1111).... # I wrote ... to the German Federal Physical-Technical Institution # # Physikalisch-Technische Bundesanstalt (PTB) # Laboratorium 4.41 "Zeiteinheit" # Postfach 3345 # D-38023 Braunschweig # phone: +49 531 592-0 # # ... I received today an answer letter from Dr. Peter Hetzel, head of the PTB # department for time and frequency transmission. He explained that the # PTB translates MEZ and MESZ into English as # # Central European Time (CET) = UTC+01:00 # Central European Summer Time (CEST) = UTC+02:00 # Albania # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Albania 1940 only - Jun 16 0:00 1:00 S Rule Albania 1942 only - Nov 2 3:00 0 - Rule Albania 1943 only - Mar 29 2:00 1:00 S Rule Albania 1943 only - Apr 10 3:00 0 - Rule Albania 1974 only - May 4 0:00 1:00 S Rule Albania 1974 only - Oct 2 0:00 0 - Rule Albania 1975 only - May 1 0:00 1:00 S Rule Albania 1975 only - Oct 2 0:00 0 - Rule Albania 1976 only - May 2 0:00 1:00 S Rule Albania 1976 only - Oct 3 0:00 0 - Rule Albania 1977 only - May 8 0:00 1:00 S Rule Albania 1977 only - Oct 2 0:00 0 - Rule Albania 1978 only - May 6 0:00 1:00 S Rule Albania 1978 only - Oct 1 0:00 0 - Rule Albania 1979 only - May 5 0:00 1:00 S Rule Albania 1979 only - Sep 30 0:00 0 - Rule Albania 1980 only - May 3 0:00 1:00 S Rule Albania 1980 only - Oct 4 0:00 0 - Rule Albania 1981 only - Apr 26 0:00 1:00 S Rule Albania 1981 only - Sep 27 0:00 0 - Rule Albania 1982 only - May 2 0:00 1:00 S Rule Albania 1982 only - Oct 3 0:00 0 - Rule Albania 1983 only - Apr 18 0:00 1:00 S Rule Albania 1983 only - Oct 1 0:00 0 - Rule Albania 1984 only - Apr 1 0:00 1:00 S # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Europe/Tirane 1:19:20 - LMT 1914 1:00 - CET 1940 Jun 16 1:00 Albania CE%sT 1984 Jul 1:00 EU CE%sT # Andorra # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Europe/Andorra 0:06:04 - LMT 1901 0:00 - WET 1946 Sep 30 1:00 - CET 1985 Mar 31 2:00 1:00 EU CE%sT # Austria # Milne says Vienna time was 1:05:21. # From Paul Eggert (2006-03-22): Shanks & Pottenger give 1918-06-16 and # 1945-11-18, but the Austrian Federal Office of Metrology and # Surveying (BEV) gives 1918-09-16 and for Vienna gives the "alleged" # date of 1945-04-12 with no time. For the 1980-04-06 transition # Shanks & Pottenger give 02:00, the BEV 00:00. Go with the BEV, # and guess 02:00 for 1945-04-12. # From Alois Treindl (2019-07-22): # In 1946 the end of DST was on Monday, 7 October 1946, at 3:00 am. # Shanks had this right. Source: Die Weltpresse, 5. Oktober 1946, page 5. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Austria 1920 only - Apr 5 2:00s 1:00 S Rule Austria 1920 only - Sep 13 2:00s 0 - Rule Austria 1946 only - Apr 14 2:00s 1:00 S Rule Austria 1946 only - Oct 7 2:00s 0 - Rule Austria 1947 1948 - Oct Sun>=1 2:00s 0 - Rule Austria 1947 only - Apr 6 2:00s 1:00 S Rule Austria 1948 only - Apr 18 2:00s 1:00 S Rule Austria 1980 only - Apr 6 0:00 1:00 S Rule Austria 1980 only - Sep 28 0:00 0 - # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Europe/Vienna 1:05:21 - LMT 1893 Apr 1:00 C-Eur CE%sT 1920 1:00 Austria CE%sT 1940 Apr 1 2:00s 1:00 C-Eur CE%sT 1945 Apr 2 2:00s 1:00 1:00 CEST 1945 Apr 12 2:00s 1:00 - CET 1946 1:00 Austria CE%sT 1981 1:00 EU CE%sT # Belarus # # From Stepan Golosunov (2016-07-02): # http://www.lawbelarus.com/repub/sub30/texf9611.htm # (Act of the Cabinet of Ministers of the Republic of Belarus from # 1992-03-25 No. 157) ... says clocks were to be moved forward at 2:00 # on last Sunday of March and backward at 3:00 on last Sunday of September # (the same as previous USSR and contemporary Russian regulations). # # From Yauhen Kharuzhy (2011-09-16): # By latest Belarus government act Europe/Minsk timezone was changed to # GMT+3 without DST (was GMT+2 with DST). # # Sources (Russian language): # http://www.belta.by/ru/all_news/society/V-Belarusi-otmenjaetsja-perexod-na-sezonnoe-vremja_i_572952.html # http://naviny.by/rubrics/society/2011/09/16/ic_articles_116_175144/ # https://news.tut.by/society/250578.html # # From Alexander Bokovoy (2014-10-09): # Belarussian government decided against changing to winter time.... # http://eng.belta.by/all_news/society/Belarus-decides-against-adjusting-time-in-Russias-wake_i_76335.html # # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Europe/Minsk 1:50:16 - LMT 1880 1:50 - MMT 1924 May 2 # Minsk Mean Time 2:00 - EET 1930 Jun 21 3:00 - MSK 1941 Jun 28 1:00 C-Eur CE%sT 1944 Jul 3 3:00 Russia MSK/MSD 1990 3:00 - MSK 1991 Mar 31 2:00s 2:00 Russia EE%sT 2011 Mar 27 2:00s 3:00 - %z # Belgium # Luxembourg # Netherlands # # From Michael Deckers (2019-08-25): # The exposition in the web page # https://www.bestor.be/wiki/index.php/Voyager_dans_le_temps._L%E2%80%99introduction_de_la_norme_de_Greenwich_en_Belgique # gives several contemporary sources from which one can conclude that # the switch in Europe/Brussels on 1892-05-01 was from 00:17:30 to 00:00:00. # # From Paul Eggert (2019-08-28): # This quote helps explain the late-1914 situation: # In early November 1914, the Germans imposed the time zone used in central # Europe and forced the inhabitants to set their watches and public clocks # sixty minutes ahead. Many were reluctant to accept "German time" and # continued to use "Belgian time" among themselves. Reflecting the spirit of # resistance that arose in the population, a song made fun of this change.... # The song ended: # Putting your clock forward # Will but hasten the happy hour # When we kick out the Boches! # See: Pluvinage G. Brussels on German time. Cahiers Bruxellois - # Brusselse Cahiers. 2014;XLVI(1E):15-38. # https://www.cairn.info/revue-cahiers-bruxellois-2014-1E-page-15.htm # # Entries from 1914 through 1917 are taken from "De tijd in België" # . # Entries from 1918 through 1991 are taken from: # Annuaire de L'Observatoire Royal de Belgique, # Avenue Circulaire, 3, B-1180 BRUXELLES, CLVIIe année, 1991 # (Imprimerie HAYEZ, s.p.r.l., Rue Fin, 4, 1080 BRUXELLES, MCMXC), # pp 8-9. # Thanks to Pascal Delmoitie for the 1918/1991 references. # The 1918 rules are listed for completeness; they apply to unoccupied Belgium. # Assume Brussels switched to WET in 1918 when the armistice took effect. # # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Belgium 1918 only - Mar 9 0:00s 1:00 S Rule Belgium 1918 1919 - Oct Sat>=1 23:00s 0 - Rule Belgium 1919 only - Mar 1 23:00s 1:00 S Rule Belgium 1920 only - Feb 14 23:00s 1:00 S Rule Belgium 1920 only - Oct 23 23:00s 0 - Rule Belgium 1921 only - Mar 14 23:00s 1:00 S Rule Belgium 1921 only - Oct 25 23:00s 0 - Rule Belgium 1922 only - Mar 25 23:00s 1:00 S Rule Belgium 1922 1927 - Oct Sat>=1 23:00s 0 - Rule Belgium 1923 only - Apr 21 23:00s 1:00 S Rule Belgium 1924 only - Mar 29 23:00s 1:00 S Rule Belgium 1925 only - Apr 4 23:00s 1:00 S # DSH writes that a royal decree of 1926-02-22 specified the Sun following 3rd # Sat in Apr (except if it's Easter, in which case it's one Sunday earlier), # to Sun following 1st Sat in Oct, and that a royal decree of 1928-09-15 # changed the transition times to 02:00 GMT. Rule Belgium 1926 only - Apr 17 23:00s 1:00 S Rule Belgium 1927 only - Apr 9 23:00s 1:00 S Rule Belgium 1928 only - Apr 14 23:00s 1:00 S Rule Belgium 1928 1938 - Oct Sun>=2 2:00s 0 - Rule Belgium 1929 only - Apr 21 2:00s 1:00 S Rule Belgium 1930 only - Apr 13 2:00s 1:00 S Rule Belgium 1931 only - Apr 19 2:00s 1:00 S Rule Belgium 1932 only - Apr 3 2:00s 1:00 S Rule Belgium 1933 only - Mar 26 2:00s 1:00 S Rule Belgium 1934 only - Apr 8 2:00s 1:00 S Rule Belgium 1935 only - Mar 31 2:00s 1:00 S Rule Belgium 1936 only - Apr 19 2:00s 1:00 S Rule Belgium 1937 only - Apr 4 2:00s 1:00 S Rule Belgium 1938 only - Mar 27 2:00s 1:00 S Rule Belgium 1939 only - Apr 16 2:00s 1:00 S Rule Belgium 1939 only - Nov 19 2:00s 0 - Rule Belgium 1940 only - Feb 25 2:00s 1:00 S Rule Belgium 1944 only - Sep 17 2:00s 0 - Rule Belgium 1945 only - Apr 2 2:00s 1:00 S Rule Belgium 1945 only - Sep 16 2:00s 0 - Rule Belgium 1946 only - May 19 2:00s 1:00 S Rule Belgium 1946 only - Oct 7 2:00s 0 - # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Europe/Brussels 0:17:30 - LMT 1880 0:17:30 - BMT 1892 May 1 00:17:30 0:00 - WET 1914 Nov 8 1:00 - CET 1916 May 1 0:00 1:00 C-Eur CE%sT 1918 Nov 11 11:00u 0:00 Belgium WE%sT 1940 May 20 2:00s 1:00 C-Eur CE%sT 1944 Sep 3 1:00 Belgium CE%sT 1977 1:00 EU CE%sT # Bulgaria # # From Plamen Simenov via Steffen Thorsen (1999-09-09): # A document of Government of Bulgaria (No. 94/1997) says: # EET -> EETDST is in 03:00 Local time in last Sunday of March ... # EETDST -> EET is in 04:00 Local time in last Sunday of October # # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Bulg 1979 only - Mar 31 23:00 1:00 S Rule Bulg 1979 only - Oct 1 1:00 0 - Rule Bulg 1980 1982 - Apr Sat>=1 23:00 1:00 S Rule Bulg 1980 only - Sep 29 1:00 0 - Rule Bulg 1981 only - Sep 27 2:00 0 - # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Europe/Sofia 1:33:16 - LMT 1880 1:56:56 - IMT 1894 Nov 30 # Istanbul MT? 2:00 - EET 1942 Nov 2 3:00 1:00 C-Eur CE%sT 1945 1:00 - CET 1945 Apr 2 3:00 2:00 - EET 1979 Mar 31 23:00 2:00 Bulg EE%sT 1982 Sep 26 3:00 2:00 C-Eur EE%sT 1991 2:00 E-Eur EE%sT 1997 2:00 EU EE%sT # Cyprus # Please see the 'asia' file for Asia/Nicosia. # Czech Republic (Czechia) # Slovakia # # From Ivan Benovic (2024-01-30): # https://www.slov-lex.sk/pravne-predpisy/SK/ZZ/1946/54/ # (This is an official link to the Czechoslovak Summer Time Act of # March 8, 1946 that authorizes the Czechoslovak government to set the # exact dates of change to summer time and back to Central European Time. # The act also implicitly confirms Central European Time as the # official time zone of Czechoslovakia and currently remains in force # in both the Czech Republic and Slovakia.) # https://www.psp.cz/eknih/1945pns/tisky/t0216_00.htm # (This is a link to the original legislative proposal dating back to # February 22, 1946. The accompanying memorandum to the proposal says # that an advisory committee on European railroad transportation that # met in Brussels in October 1945 decided that the change of time # should be carried out in all participating countries in a strictly # coordinated manner....) # # From Paul Eggert (2024-01-30): # The source for Czech data is: Kdy začíná a končí letní čas. # https://kalendar.beda.cz/kdy-zacina-a-konci-letni-cas # Its main text disagrees with its quoted sources only in 1918, # where the main text says spring and autumn transitions # occurred at 02:00 and 03:00 respectively (as usual), # whereas the 1918 source "Oznámení o zavedení letního času v roce 1918" # says transitions were at 01:00 and 02:00 respectively. # As the 1918 source appears to be a humorous piece, and it is # unlikely that Prague would have disagreed with its neighbors by an hour, # go with the main text for now. # # We know of no English-language name for historical Czech winter time; # abbreviate it as "GMT", as it happened to be GMT. # # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Czech 1945 only - Apr Mon>=1 2:00s 1:00 S Rule Czech 1945 only - Oct 1 2:00s 0 - Rule Czech 1946 only - May 6 2:00s 1:00 S Rule Czech 1946 1949 - Oct Sun>=1 2:00s 0 - Rule Czech 1947 1948 - Apr Sun>=15 2:00s 1:00 S Rule Czech 1949 only - Apr 9 2:00s 1:00 S # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Europe/Prague 0:57:44 - LMT 1850 0:57:44 - PMT 1891 Oct # Prague Mean Time 1:00 C-Eur CE%sT 1945 May 9 1:00 Czech CE%sT 1946 Dec 1 3:00 # Vanguard section, for zic and other parsers that support negative DST. 1:00 -1:00 GMT 1947 Feb 23 2:00 # Rearguard section, for parsers lacking negative DST; see ziguard.awk. # 0:00 - GMT 1947 Feb 23 2:00 # End of rearguard section. 1:00 Czech CE%sT 1979 1:00 EU CE%sT # Faroe Is # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Atlantic/Faroe -0:27:04 - LMT 1908 Jan 11 # Tórshavn 0:00 - WET 1981 0:00 EU WE%sT # Greenland # # From Paul Eggert (2004-10-31): # During World War II, Germany maintained secret manned weather stations in # East Greenland and Franz Josef Land, but we don't know their time zones. # My source for this is Wilhelm Dege's book mentioned under Svalbard. # # From Paul Eggert (2017-12-10): # Greenland joined the European Communities as part of Denmark, # obtained home rule on 1979-05-01, and left the European Communities # on 1985-02-01. It therefore should have been using EU # rules at least through 1984. Shanks & Pottenger say Scoresbysund and Godthåb # used C-Eur rules after 1980, but IATA SSIM (1991/1996) says they use EU # rules since at least 1991. Assume EU rules since 1980. # From Gwillim Law (2001-06-06), citing # (2001-03-15), # and with translations corrected by Steffen Thorsen: # # Greenland has four local times, and the relation to UTC # is according to the following time line: # # The military zone near Thule UTC-4 # Standard Greenland time UTC-3 # Scoresbysund UTC-1 # Danmarkshavn UTC # # In the military area near Thule and in Danmarkshavn DST will not be # introduced. # From Rives McDow (2001-11-01): # # I correspond regularly with the Dansk Polarcenter, and wrote them at # the time to clarify the situation in Thule. Unfortunately, I have # not heard back from them regarding my recent letter. [But I have # info from earlier correspondence.] # # According to the center, a very small local time zone around Thule # Air Base keeps the time according to UTC-4, implementing daylight # savings using North America rules, changing the time at 02:00 local time.... # # The east coast of Greenland north of the community of Scoresbysund # uses UTC in the same way as in Iceland, year round, with no dst. # There are just a few stations on this coast, including the # Danmarkshavn ICAO weather station mentioned in your September 29th # email. The other stations are two sledge patrol stations in # Mestersvig and Daneborg, the air force base at Station Nord, and the # DPC research station at Zackenberg. # # Scoresbysund and two small villages nearby keep time UTC-1 and use # the same daylight savings time period as in West Greenland (Godthåb). # # The rest of Greenland, including Godthåb (this area, although it # includes central Greenland, is known as west Greenland), keeps time # UTC-3, with daylight savings methods according to European rules. # # It is common procedure to use UTC 0 in the wilderness of East and # North Greenland, because it is mainly Icelandic aircraft operators # maintaining traffic in these areas. However, the official status of # this area is that it sticks with Godthåb time. This area might be # considered a dual time zone in some respects because of this. # From Rives McDow (2001-11-19): # I heard back from someone stationed at Thule; the time change took place # there at 2:00 AM. # From Paul Eggert (2006-03-22): # From 1997 on the CIA map shows Danmarkshavn on GMT; # the 1995 map as like Godthåb. # For lack of better info, assume they were like Godthåb before 1996. # startkart.no says Thule does not observe DST, but this is clearly an error, # so go with Shanks & Pottenger for Thule transitions until this year. # For 2007 on assume Thule will stay in sync with US DST rules. # From J William Piggott (2016-02-20): # "Greenland north of the community of Scoresbysund" is officially named # "National Park" by Executive Order: # http://naalakkersuisut.gl/~/media/Nanoq/Files/Attached%20Files/Engelske-tekster/Legislation/Executive%20Order%20National%20Park.rtf # It is their only National Park. # From Jonas Nyrup (2022-11-24): # On last Saturday in October 2023 when DST ends America/Nuuk will switch # from -03/-02 to -02/-01 # https://sermitsiaq.ag/forslagtidsforskel-danmark-mindskes-sommertid-beholdes # ... # https://sermitsiaq.ag/groenland-skifte-tidszone-trods-bekymringer # # From Jürgen Appel (2022-11-25): # https://ina.gl/samlinger/oversigt-over-samlinger/samling/dagsordener/dagsorden.aspx?lang=da&day=24-11-2022 # # From Thomas M. Steenholdt (2022-12-02): # - The bill to move America/Nuuk from UTC-03 to UTC-02 passed. # - The bill to stop observing DST did not (Greenland will stop observing DST # when EU does). # Details on the implementation are here (section 6): # https://ina.gl/dvd/EM%202022/pdf/media/2553529/pkt17_em2022_tidens_bestemmelse_bem_da.pdf # This is how the change will be implemented: # 1. The shift *to* DST in 2023 happens as normal. # 2. The shift *from* DST in 2023 happens as normal, but coincides with the # shift to UTC-02 normaltime (people will not change their clocks here). # 3. After this, DST is still observed, but as -02/-01 instead of -03/-02. # # From Múte Bourup Egede via Jógvan Svabo Samuelsen (2023-03-15): # Greenland will not switch to Daylight Saving Time this year, 2023, # because the standard time for Greenland will change from UTC -3 to UTC -2. # However, Greenland will change to Daylight Saving Time again in 2024 # and onwards. # From Jule Dabars (2023-10-29): # https://www.dr.dk/nyheder/seneste/i-nat-skal-uret-stilles-en-time-tilbage-men-foerste-gang-sker-det-ikke-i-groenland # with a link to that page: # https://naalakkersuisut.gl/Nyheder/2023/10/2710_sommertid # ... Ittoqqortoormiit joins the time of Nuuk at March 2024. # What would mean that America/Scoresbysund would either be in -01 year round # or in -02/-01 like America/Nuuk, but no longer in -01/+00. # # From Paul Eggert (2023-10-29): # For now, assume it will be like America/Nuuk. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Thule 1991 1992 - Mar lastSun 2:00 1:00 D Rule Thule 1991 1992 - Sep lastSun 2:00 0 S Rule Thule 1993 2006 - Apr Sun>=1 2:00 1:00 D Rule Thule 1993 2006 - Oct lastSun 2:00 0 S Rule Thule 2007 max - Mar Sun>=8 2:00 1:00 D Rule Thule 2007 max - Nov Sun>=1 2:00 0 S # # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Danmarkshavn -1:14:40 - LMT 1916 Jul 28 -3:00 - %z 1980 Apr 6 2:00 -3:00 EU %z 1996 0:00 - GMT # # Use the old name Scoresbysund, as the current name Ittoqqortoormiit # exceeds tzdb's 14-letter limit and has no common English abbreviation. Zone America/Scoresbysund -1:27:52 - LMT 1916 Jul 28 # Ittoqqortoormiit -2:00 - %z 1980 Apr 6 2:00 -2:00 C-Eur %z 1981 Mar 29 -1:00 EU %z 2024 Mar 31 -2:00 EU %z Zone America/Nuuk -3:26:56 - LMT 1916 Jul 28 # Godthåb -3:00 - %z 1980 Apr 6 2:00 -3:00 EU %z 2023 Mar 26 1:00u -2:00 - %z 2023 Oct 29 1:00u -2:00 EU %z Zone America/Thule -4:35:08 - LMT 1916 Jul 28 # Pituffik -4:00 Thule A%sT # Estonia # # From Paul Eggert (2016-03-18): # The 1989 transition is from USSR act No. 227 (1989-03-14). # # From Peter Ilieve (1994-10-15): # A relative in Tallinn confirms the accuracy of the data for 1989 onwards # [through 1994] and gives the legal authority for it, # a regulation of the Government of Estonia, No. 111 of 1989.... # # From Peter Ilieve (1996-10-28): # [IATA SSIM (1992/1996) claims that the Baltic republics switch at 01:00s, # but a relative confirms that Estonia still switches at 02:00s, writing:] # "I do not [know] exactly but there are some little different # (confusing) rules for International Air and Railway Transport Schedules # conversion in Sunday connected with end of summer time in Estonia.... # A discussion is running about the summer time efficiency and effect on # human physiology. It seems that Estonia maybe will not change to # summer time next spring." # From Peter Ilieve (1998-11-04), heavily edited: # The 1998-09-22 Estonian time law # http://trip.rk.ee/cgi-bin/thw?${BASE}=akt&${OOHTML}=rtd&TA=1998&TO=1&AN=1390 # refers to the Eighth Directive and cites the association agreement between # the EU and Estonia, ratified by the Estonian law (RT II 1995, 22-27, 120). # # I also asked [my relative] whether they use any standard abbreviation # for their standard and summer times. He says no, they use "suveaeg" # (summer time) and "talveaeg" (winter time). # From The Baltic Times (1999-09-09) # via Steffen Thorsen: # This year will mark the last time Estonia shifts to summer time, # a council of the ruling coalition announced Sept. 6.... # But what this could mean for Estonia's chances of joining the European # Union are still unclear. In 1994, the EU declared summer time compulsory # for all member states until 2001. Brussels has yet to decide what to do # after that. # From Mart Oruaas (2000-01-29): # Regulation No. 301 (1999-10-12) obsoletes previous regulation # No. 206 (1998-09-22) and thus sticks Estonia to +02:00 GMT for all # the year round. The regulation is effective 1999-11-01. # From Toomas Soome (2002-02-21): # The Estonian government has changed once again timezone politics. # Now we are using again EU rules. # # From Urmet Jänes (2002-03-28): # The legislative reference is Government decree No. 84 on 2002-02-21. # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Europe/Tallinn 1:39:00 - LMT 1880 1:39:00 - TMT 1918 Feb # Tallinn Mean Time 1:00 C-Eur CE%sT 1919 Jul 1:39:00 - TMT 1921 May 2:00 - EET 1940 Aug 6 3:00 - MSK 1941 Sep 15 1:00 C-Eur CE%sT 1944 Sep 22 3:00 Russia MSK/MSD 1989 Mar 26 2:00s 2:00 1:00 EEST 1989 Sep 24 2:00s 2:00 C-Eur EE%sT 1998 Sep 22 2:00 EU EE%sT 1999 Oct 31 4:00 2:00 - EET 2002 Feb 21 2:00 EU EE%sT # Finland # From Hannu Strang (1994-09-25 06:03:37 UTC): # Well, here in Helsinki we're just changing from summer time to regular one, # and it's supposed to change at 4am... # From Janne Snabb (2010-07-15): # # I noticed that the Finland data is not accurate for years 1981 and 1982. # During these two first trial years the DST adjustment was made one hour # earlier than in forthcoming years. Starting 1983 the adjustment was made # according to the central European standards. # # This is documented in Heikki Oja: Aikakirja 2007, published by The Almanac # Office of University of Helsinki, ISBN 952-10-3221-9, available online (in # Finnish) at # https://almanakka.helsinki.fi/aikakirja/Aikakirja2007kokonaan.pdf # # Page 105 (56 in PDF version) has a handy table of all past daylight savings # transitions. It is easy enough to interpret without Finnish skills. # # This is also confirmed by Finnish Broadcasting Company's archive at: # http://www.yle.fi/elavaarkisto/?s=s&g=1&ag=5&t=&a=3401 # # The news clip from 1981 says that "the time between 2 and 3 o'clock does not # exist tonight." # From Konstantin Hyppönen (2014-06-13): # [Heikki Oja's book Aikakirja 2013] # https://almanakka.helsinki.fi/images/aikakirja/Aikakirja2013kokonaan.pdf # pages 104-105, including a scan from a newspaper published on Apr 2 1942 # say that ... [o]n Apr 2 1942, 24 o'clock (which means Apr 3 1942, # 00:00), clocks were moved one hour forward. The newspaper # mentions "on the night from Thursday to Friday".... # On Oct 4 1942, clocks were moved at 1:00 one hour backwards. # # From Paul Eggert (2014-06-14): # Go with Oja over Shanks. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Finland 1942 only - Apr 2 24:00 1:00 S Rule Finland 1942 only - Oct 4 1:00 0 - Rule Finland 1981 1982 - Mar lastSun 2:00 1:00 S Rule Finland 1981 1982 - Sep lastSun 3:00 0 - # Milne says Helsinki (Helsingfors) time was 1:39:49.2 (official document). # Zone NAME STDOFF RULES FORMAT [UNTIL] #STDOFF 1:39:49.2 Zone Europe/Helsinki 1:39:49 - LMT 1878 May 31 1:39:49 - HMT 1921 May # Helsinki Mean Time 2:00 Finland EE%sT 1983 2:00 EU EE%sT # France # Monaco # From Ciro Discepolo (2000-12-20): # # Henri Le Corre, Régimes horaires pour le monde entier, Éditions # Traditionnelles - Paris 2 books, 1993 # # Gabriel, Traité de l'heure dans le monde, Guy Trédaniel, # Paris, 1991 # # Françoise Gauquelin, Problèmes de l'heure résolus en astrologie, # Guy Trédaniel, Paris 1987 # From Michael Deckers (2020-06-11): # the law of 1891 # was published on 1891-03-15, so it could only take force on 1891-03-16. # From Michael Deckers (2020-06-10): # Le Gaulois, 1911-03-11, page 1/6, online at # https://www.retronews.fr/societe/echo-de-presse/2018/01/29/1911-change-lheure-de-paris # ... [ Instantly, all pressure driven clock dials halted... Nine minutes and # twenty-one seconds later the hands resumed their circular motion. ] # There are also precise reports about how the change was prepared in train # stations: all the publicly visible clocks stopped at midnight railway time # (or were covered), only the chief of service had a watch, labeled # "Heure ancienne", that he kept running until it reached 00:04:21, when # he announced "Heure nouvelle". See the "Le Petit Journal 1911-03-11". # https://gallica.bnf.fr/ark:/12148/bpt6k6192911/f1.item.zoom # # From Michael Deckers (2020-06-12): # That "all French clocks stopped" for 00:09:21 is a misreading of French # newspapers; this sort of adjustment applies only to certain # remote-controlled clocks ("pendules pneumatiques", of which there existed # perhaps a dozen in Paris, and which simply could not be set back remotely), # but not to all the clocks in all French towns and villages. For instance, # the following story in the "Courrier de Saône-et-Loire" 1911-03-11, page 2: # only works if legal time was stepped back (was not monotone): ... # [One can observe that children who had been born at midnight less 5 # minutes and who had died at midnight of the old time, would turn out to # be dead before being born, time having been set back and having # suppressed 9 minutes and 25 seconds of their existence, that is, more # than they could spend.] # # From Paul Eggert (2020-06-12): # French time in railway stations was legally five minutes behind civil time, # which explains why railway "old time" ran to 00:04:21 instead of to 00:09:21. # The law's text (which Michael Deckers noted is at # ) says only that # at 1911-03-11 00:00 legal time was that of Paris mean time delayed by # nine minutes and twenty-one seconds, and does not say how the # transition from Paris mean time was to occur. # # tzdb has no way to represent stopped clocks. As the railway practice # was to keep a watch running on "old time" to decide when to restart # the other clocks, this could be modeled as a transition for "old time" at # 00:09:21. However, since the law was ambiguous and clocks outside railway # stations were probably done haphazardly with the popular impression being # that the transition was done at 00:00 "old time", simply leave the time # blank; this causes zic to default to 00:00 "old time" which is good enough. # Do something similar for the 1891-03-16 transition. There are similar # problems in Algiers, Monaco and Tunis. # # Shank & Pottenger seem to use '24:00' ambiguously; resolve it with Whitman. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule France 1916 only - Jun 14 23:00s 1:00 S Rule France 1916 1919 - Oct Sun>=1 23:00s 0 - Rule France 1917 only - Mar 24 23:00s 1:00 S Rule France 1918 only - Mar 9 23:00s 1:00 S Rule France 1919 only - Mar 1 23:00s 1:00 S Rule France 1920 only - Feb 14 23:00s 1:00 S Rule France 1920 only - Oct 23 23:00s 0 - Rule France 1921 only - Mar 14 23:00s 1:00 S Rule France 1921 only - Oct 25 23:00s 0 - Rule France 1922 only - Mar 25 23:00s 1:00 S # DSH writes that a law of 1923-05-24 specified 3rd Sat in Apr at 23:00 to 1st # Sat in Oct at 24:00; and that in 1930, because of Easter, the transitions # were Apr 12 and Oct 5. Go with Shanks & Pottenger. Rule France 1922 1938 - Oct Sat>=1 23:00s 0 - Rule France 1923 only - May 26 23:00s 1:00 S Rule France 1924 only - Mar 29 23:00s 1:00 S Rule France 1925 only - Apr 4 23:00s 1:00 S Rule France 1926 only - Apr 17 23:00s 1:00 S Rule France 1927 only - Apr 9 23:00s 1:00 S Rule France 1928 only - Apr 14 23:00s 1:00 S Rule France 1929 only - Apr 20 23:00s 1:00 S Rule France 1930 only - Apr 12 23:00s 1:00 S Rule France 1931 only - Apr 18 23:00s 1:00 S Rule France 1932 only - Apr 2 23:00s 1:00 S Rule France 1933 only - Mar 25 23:00s 1:00 S Rule France 1934 only - Apr 7 23:00s 1:00 S Rule France 1935 only - Mar 30 23:00s 1:00 S Rule France 1936 only - Apr 18 23:00s 1:00 S Rule France 1937 only - Apr 3 23:00s 1:00 S Rule France 1938 only - Mar 26 23:00s 1:00 S Rule France 1939 only - Apr 15 23:00s 1:00 S Rule France 1939 only - Nov 18 23:00s 0 - Rule France 1940 only - Feb 25 2:00 1:00 S # The French rules for 1941-1944 were not used in Paris, but Shanks & Pottenger # write that they were used in Monaco and in many French locations. # Le Corre writes that the upper limit of the free zone was Arnéguy, Orthez, # Mont-de-Marsan, Bazas, Langon, Lamothe-Montravel, Marœuil, La # Rochefoucauld, Champagne-Mouton, La Roche-Posay, La Haye-Descartes, # Loches, Montrichard, Vierzon, Bourges, Moulins, Digoin, # Paray-le-Monial, Montceau-les-Mines, Chalon-sur-Saône, Arbois, # Dole, Morez, St-Claude, and Collonges (Haute-Savoie). Rule France 1941 only - May 5 0:00 2:00 M # Midsummer # Shanks & Pottenger say this transition occurred at Oct 6 1:00, # but go with Denis Excoffier (1997-12-12), # who quotes the Ephémérides astronomiques for 1998 from Bureau des Longitudes # as saying 5/10/41 22hUT. Rule France 1941 only - Oct 6 0:00 1:00 S Rule France 1942 only - Mar 9 0:00 2:00 M Rule France 1942 only - Nov 2 3:00 1:00 S Rule France 1943 only - Mar 29 2:00 2:00 M Rule France 1943 only - Oct 4 3:00 1:00 S Rule France 1944 only - Apr 3 2:00 2:00 M Rule France 1944 only - Oct 8 1:00 1:00 S Rule France 1945 only - Apr 2 2:00 2:00 M Rule France 1945 only - Sep 16 3:00 0 - # Shanks & Pottenger give Mar 28 2:00 and Sep 26 3:00; # go with Excoffier's 28/3/76 0hUT and 25/9/76 23hUT. Rule France 1976 only - Mar 28 1:00 1:00 S Rule France 1976 only - Sep 26 1:00 0 - # Howse writes that the time in France was officially based # on PMT-0:09:21 until 1978-08-09, when the time base finally switched to UTC. # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Europe/Paris 0:09:21 - LMT 1891 Mar 16 0:09:21 - PMT 1911 Mar 11 # Paris Mean Time # Shanks & Pottenger give 1940 Jun 14 0:00; go with Excoffier and Le Corre. 0:00 France WE%sT 1940 Jun 14 23:00 # Le Corre says Paris stuck with occupied-France time after the liberation; # go with Shanks & Pottenger. 1:00 C-Eur CE%sT 1944 Aug 25 0:00 France WE%sT 1945 Sep 16 3:00 1:00 France CE%sT 1977 1:00 EU CE%sT # Denmark # Germany # Norway # Sweden # From Markus Kuhn (1998-09-29): # The German time zone web site by the Physikalisch-Technische # Bundesanstalt contains DST information back to 1916. # [See tz-link.html for the URL.] # From Jörg Schilling (2002-10-23): # In 1945, Berlin was switched to Moscow Summer time (GMT+4) by # https://www.dhm.de/lemo/html/biografien/BersarinNikolai/ # General [Nikolai] Bersarin. # From Paul Eggert (2003-03-08): # http://www.parlament-berlin.de/pds-fraktion.nsf/727459127c8b66ee8525662300459099/defc77cb784f180ac1256c2b0030274b/$FILE/bersarint.pdf # says that Bersarin issued an order to use Moscow time on May 20. # However, Moscow did not observe daylight saving in 1945, so # this was equivalent to UT +03, not +04. # Svalbard & Jan Mayen # From Steffen Thorsen (2001-05-01): # Although I could not find it explicitly, it seems that Jan Mayen and # Svalbard have been using the same time as Norway at least since the # time they were declared as parts of Norway. Svalbard was declared # as a part of Norway by law of 1925-07-17 no 11, section 4 and Jan # Mayen by law of 1930-02-27 no 2, section 2. (From # and # ). The law/regulation # for normal/standard time in Norway is from 1894-06-29 no 1 (came # into operation on 1895-01-01) and Svalbard/Jan Mayen seem to be a # part of this law since 1925/1930. (From # ) I have not been # able to find if Jan Mayen used a different time zone (e.g. -0100) # before 1930. Jan Mayen has only been "inhabited" since 1921 by # Norwegian meteorologists and maybe used the same time as Norway ever # since 1921. Svalbard (Arctic/Longyearbyen) has been inhabited since # before 1895, and therefore probably changed the local time somewhere # between 1895 and 1925 (inclusive). # From Paul Eggert (2013-09-04): # # Actually, Jan Mayen was never occupied by Germany during World War II, # so it must have diverged from Oslo time during the war, as Oslo was # keeping Berlin time. # # says that the meteorologists # burned down their station in 1940 and left the island, but returned in # 1941 with a small Norwegian garrison and continued operations despite # frequent air attacks from Germans. In 1943 the Americans established a # radiolocating station on the island, called "Atlantic City". Possibly # the UT offset changed during the war, but I think it unlikely that # Jan Mayen used German daylight-saving rules. # # Svalbard is more complicated, as it was raided in August 1941 by an # Allied party that evacuated the civilian population to England (says # ). The Svalbard FAQ # says that the Germans were # expelled on 1942-05-14. However, small parties of Germans did return, # and according to Wilhelm Dege's book "War North of 80" (1954) # http://www.ucalgary.ca/UofC/departments/UP/1-55238/1-55238-110-2.html # the German armed forces at the Svalbard weather station code-named # Haudegen did not surrender to the Allies until September 1945. # # All these events predate our cutoff date of 1970, so use Europe/Berlin # for these regions. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Germany 1946 only - Apr 14 2:00s 1:00 S Rule Germany 1946 only - Oct 7 2:00s 0 - Rule Germany 1947 1949 - Oct Sun>=1 2:00s 0 - # https://www.ptb.de/cms/en/ptb/fachabteilungen/abt4/fb-44/ag-441/realisation-of-legal-time-in-germany/dst-and-midsummer-dst-in-germany-until-1979.html # says the following transition occurred at 3:00 MEZ, not the 2:00 MEZ # given in Shanks & Pottenger. Go with the PTB. Rule Germany 1947 only - Apr 6 3:00s 1:00 S Rule Germany 1947 only - May 11 2:00s 2:00 M Rule Germany 1947 only - Jun 29 3:00 1:00 S Rule Germany 1948 only - Apr 18 2:00s 1:00 S Rule Germany 1949 only - Apr 10 2:00s 1:00 S Rule SovietZone 1945 only - May 24 2:00 2:00 M # Midsummer Rule SovietZone 1945 only - Sep 24 3:00 1:00 S Rule SovietZone 1945 only - Nov 18 2:00s 0 - # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Europe/Berlin 0:53:28 - LMT 1893 Apr 1:00 C-Eur CE%sT 1945 May 24 2:00 1:00 SovietZone CE%sT 1946 1:00 Germany CE%sT 1980 1:00 EU CE%sT # Georgia # Please see the "asia" file for Asia/Tbilisi. # Herodotus (Histories, IV.45) says Georgia north of the Phasis (now Rioni) # is in Europe. Our reference location Tbilisi is in the Asian part. # Gibraltar # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Europe/Gibraltar -0:21:24 - LMT 1880 Aug 2 0:00 GB-Eire %s 1957 Apr 14 2:00 1:00 - CET 1982 1:00 EU CE%sT # Greece # Rule NAME FROM TO - IN ON AT SAVE LETTER/S # Whitman gives 1932 Jul 5 - Nov 1; go with Shanks & Pottenger. Rule Greece 1932 only - Jul 7 0:00 1:00 S Rule Greece 1932 only - Sep 1 0:00 0 - # Whitman gives 1941 Apr 25 - ?; go with Shanks & Pottenger. Rule Greece 1941 only - Apr 7 0:00 1:00 S # Whitman gives 1942 Feb 2 - ?; go with Shanks & Pottenger. Rule Greece 1942 only - Nov 2 3:00 0 - Rule Greece 1943 only - Mar 30 0:00 1:00 S Rule Greece 1943 only - Oct 4 0:00 0 - # Whitman gives 1944 Oct 3 - Oct 31; go with Shanks & Pottenger. Rule Greece 1952 only - Jul 1 0:00 1:00 S Rule Greece 1952 only - Nov 2 0:00 0 - Rule Greece 1975 only - Apr 12 0:00s 1:00 S Rule Greece 1975 only - Nov 26 0:00s 0 - Rule Greece 1976 only - Apr 11 2:00s 1:00 S Rule Greece 1976 only - Oct 10 2:00s 0 - Rule Greece 1977 1978 - Apr Sun>=1 2:00s 1:00 S Rule Greece 1977 only - Sep 26 2:00s 0 - Rule Greece 1978 only - Sep 24 4:00 0 - Rule Greece 1979 only - Apr 1 9:00 1:00 S Rule Greece 1979 only - Sep 29 2:00 0 - Rule Greece 1980 only - Apr 1 0:00 1:00 S Rule Greece 1980 only - Sep 28 0:00 0 - # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Europe/Athens 1:34:52 - LMT 1895 Sep 14 1:34:52 - AMT 1916 Jul 28 0:01 # Athens MT 2:00 Greece EE%sT 1941 Apr 30 1:00 Greece CE%sT 1944 Apr 4 2:00 Greece EE%sT 1981 # Shanks & Pottenger say it switched to C-Eur in 1981; # go with EU rules instead, since Greece joined Jan 1. 2:00 EU EE%sT # Hungary # From Michael Deckers (2020-06-09): # an Austrian encyclopedia of railroads of 1913, online at # http://www.zeno.org/Roell-1912/A/Eisenbahnzeit # says that the switch [to CET] happened on 1890-11-01. # From Géza Nyáry (2020-06-07): # Data for 1918-1983 are based on the archive database of Library Hungaricana. # The dates are collected from original, scanned governmental orders, # bulletins, instructions and public press. # [See URLs below.] # Rule NAME FROM TO - IN ON AT SAVE LETTER/S # https://library.hungaricana.hu/hu/view/OGYK_RT_1918/?pg=238 # https://library.hungaricana.hu/hu/view/OGYK_RT_1919/?pg=808 # https://library.hungaricana.hu/hu/view/OGYK_RT_1920/?pg=201 Rule Hungary 1918 1919 - Apr 15 2:00 1:00 S Rule Hungary 1918 1920 - Sep Mon>=15 3:00 0 - Rule Hungary 1920 only - Apr 5 2:00 1:00 S # https://library.hungaricana.hu/hu/view/OGYK_RT_1945/?pg=882 Rule Hungary 1945 only - May 1 23:00 1:00 S Rule Hungary 1945 only - Nov 1 1:00 0 - # https://library.hungaricana.hu/hu/view/Delmagyarorszag_1946_03/?pg=49 Rule Hungary 1946 only - Mar 31 2:00s 1:00 S # https://library.hungaricana.hu/hu/view/Delmagyarorszag_1946_09/?pg=54 Rule Hungary 1946 only - Oct 7 2:00 0 - # https://library.hungaricana.hu/hu/view/KulfBelfHirek_1947_04_1__001-123/?pg=90 # https://library.hungaricana.hu/hu/view/DunantuliNaplo_1947_09/?pg=128 # https://library.hungaricana.hu/hu/view/KulfBelfHirek_1948_03_3__001-123/?pg=304 # https://library.hungaricana.hu/hu/view/Zala_1948_09/?pg=64 # https://library.hungaricana.hu/hu/view/SatoraljaujhelyiLeveltar_ZempleniNepujsag_1948/?pg=53 # https://library.hungaricana.hu/hu/view/SatoraljaujhelyiLeveltar_ZempleniNepujsag_1948/?pg=160 # https://library.hungaricana.hu/hu/view/UjSzo_1949_01-04/?pg=102 # https://library.hungaricana.hu/hu/view/KeletMagyarorszag_1949_03/?pg=96 # https://library.hungaricana.hu/hu/view/Delmagyarorszag_1949_09/?pg=94 Rule Hungary 1947 1949 - Apr Sun>=4 2:00s 1:00 S Rule Hungary 1947 1949 - Oct Sun>=1 2:00s 0 - # https://library.hungaricana.hu/hu/view/DTT_KOZL_TanacsokKozlonye_1954/?pg=513 Rule Hungary 1954 only - May 23 0:00 1:00 S Rule Hungary 1954 only - Oct 3 0:00 0 - # https://library.hungaricana.hu/hu/view/DTT_KOZL_TanacsokKozlonye_1955/?pg=398 Rule Hungary 1955 only - May 22 2:00 1:00 S Rule Hungary 1955 only - Oct 2 3:00 0 - # https://library.hungaricana.hu/hu/view/HevesMegyeiNepujsag_1956_06/?pg=0 # https://library.hungaricana.hu/hu/view/EszakMagyarorszag_1956_06/?pg=6 # https://library.hungaricana.hu/hu/view/SzolnokMegyeiNeplap_1957_04/?pg=120 # https://library.hungaricana.hu/hu/view/PestMegyeiHirlap_1957_09/?pg=143 Rule Hungary 1956 1957 - Jun Sun>=1 2:00 1:00 S Rule Hungary 1956 1957 - Sep lastSun 3:00 0 - # https://library.hungaricana.hu/hu/view/DTT_KOZL_TanacsokKozlonye_1980/?pg=189 Rule Hungary 1980 only - Apr 6 0:00 1:00 S Rule Hungary 1980 only - Sep 28 1:00 0 - # https://library.hungaricana.hu/hu/view/DTT_KOZL_TanacsokKozlonye_1980/?pg=1227 # https://library.hungaricana.hu/hu/view/Delmagyarorszag_1981_01/?pg=79 # https://library.hungaricana.hu/hu/view/DTT_KOZL_TanacsokKozlonye_1982/?pg=115 # https://library.hungaricana.hu/hu/view/DTT_KOZL_TanacsokKozlonye_1983/?pg=85 Rule Hungary 1981 1983 - Mar lastSun 0:00 1:00 S Rule Hungary 1981 1983 - Sep lastSun 1:00 0 - # # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Europe/Budapest 1:16:20 - LMT 1890 Nov 1 1:00 C-Eur CE%sT 1918 # https://library.hungaricana.hu/hu/view/OGYK_RT_1941/?pg=1204 # https://library.hungaricana.hu/hu/view/OGYK_RT_1942/?pg=3955 1:00 Hungary CE%sT 1941 Apr 7 23:00 1:00 C-Eur CE%sT 1945 1:00 Hungary CE%sT 1984 1:00 EU CE%sT # Italy # San Marino # Vatican City # # From Paul Eggert (2001-03-06): # Sicily and Sardinia each had their own time zones from 1866 to 1893, # called Palermo Time (+00:53:28) and Cagliari Time (+00:36:32). # During World War II, German-controlled Italy used German time. # But these events all occurred before the 1970 cutoff, # so record only the time in Rome. # # From Stephen Trainor (2019-05-06): # http://www.ac-ilsestante.it/MERIDIANE/ora_legale/ORA_LEGALE_ESTIVA_IN_ITALIA.htm # ... the [1866] law went into effect on 12 December 1866, rather than # the date of the decree (22 Sep 1866) # https://web.archive.org/web/20070824155341/http://www.iav.it/planetario/didastro/didastro/english.htm # ... "In Italy in 1866 there were 6 railway times (Torino, Verona, Firenze, # Roma, Napoli, Palermo). On that year it was decided to unify them, adopting # the average time of Rome (even if this city was not yet part of the # kingdom). On the 12th December 1866, on the starting of the winter time # table, it took effect in the railways, the post office and the telegraph, # not only for the internal service but also for the public.... Milano set # the public watches on the Rome time on the same day (12th December 1866), # Torino and Bologna on the 1st January 1867, Venezia the 1st May 1880 and the # last city was Cagliari in 1886." # # From Luigi Rosa (2019-05-07): # this is the scan of the decree: # http://www.radiomarconi.com/marconi/filopanti/1866c.jpg # # From Michael Deckers (2016-10-24): # http://www.ac-ilsestante.it/MERIDIANE/ora_legale quotes a law of 1893-08-10 # ... [translated as] "The preceding dispositions will enter into # force at the instant at which, according to the time specified in # the 1st article, the 1st of November 1893 will begin...." # # From Pierpaolo Bernardi (2016-10-20): # The authoritative source for time in Italy is the national metrological # institute, which has a summary page of historical DST data at # http://www.inrim.it/res/tf/ora_legale_i.shtml # [now at http://oldsite.inrim.it/res/tf/ora_legale_i.shtml as of 2017] # (2016-10-24): # http://www.renzobaldini.it/le-ore-legali-in-italia/ # has still different data for 1944. It divides Italy in two, as # there were effectively two governments at the time, north of Gothic # Line German controlled territory, official government RSI, and south # of the Gothic Line, controlled by allied armies. # # From Brian Inglis (2016-10-23): # Viceregal LEGISLATIVE DECREE. 14 September 1944, no. 219. # Restoration of Standard Time. (044U0219) (OJ 62 of 30.9.1944) ... # Given the R. law decreed on 1944-03-29, no. 92, by which standard time is # advanced to sixty minutes later starting at hour two on 1944-04-02; ... # Starting at hour three on the date 1944-09-17 standard time will be resumed. # # From Alois Treindl (2019-07-02): # I spent 6 Euros to buy two archive copies of Il Messaggero, a Roman paper, # for 1 and 2 April 1944. The edition of 2 April has this note: "Tonight at 2 # am, put forward the clock by one hour. Remember that in the night between # today and Monday the 'ora legale' will come in force again." That makes it # clear that in Rome the change was on Monday, 3 April 1944 at 2 am. # # From Paul Eggert (2021-10-05): # Go with INRiM for DST rules, except as corrected by Inglis for 1944 # for the Kingdom of Italy. This is consistent with Renzo Baldini. # Model Rome's occupation by using C-Eur rules from 1943-09-10 # to 1944-06-04; although Rome was an open city during this period, it # was effectively controlled by Germany. Using C-Eur is consistent # with Treindl's comment about Rome in April 1944, as the "Rule Italy" # lines during German occupation do not affect Europe/Rome # (though they do affect Europe/Malta). # # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Italy 1916 only - Jun 3 24:00 1:00 S Rule Italy 1916 1917 - Sep 30 24:00 0 - Rule Italy 1917 only - Mar 31 24:00 1:00 S Rule Italy 1918 only - Mar 9 24:00 1:00 S Rule Italy 1918 only - Oct 6 24:00 0 - Rule Italy 1919 only - Mar 1 24:00 1:00 S Rule Italy 1919 only - Oct 4 24:00 0 - Rule Italy 1920 only - Mar 20 24:00 1:00 S Rule Italy 1920 only - Sep 18 24:00 0 - Rule Italy 1940 only - Jun 14 24:00 1:00 S Rule Italy 1942 only - Nov 2 2:00s 0 - Rule Italy 1943 only - Mar 29 2:00s 1:00 S Rule Italy 1943 only - Oct 4 2:00s 0 - Rule Italy 1944 only - Apr 2 2:00s 1:00 S Rule Italy 1944 only - Sep 17 2:00s 0 - Rule Italy 1945 only - Apr 2 2:00 1:00 S Rule Italy 1945 only - Sep 15 1:00 0 - Rule Italy 1946 only - Mar 17 2:00s 1:00 S Rule Italy 1946 only - Oct 6 2:00s 0 - Rule Italy 1947 only - Mar 16 0:00s 1:00 S Rule Italy 1947 only - Oct 5 0:00s 0 - Rule Italy 1948 only - Feb 29 2:00s 1:00 S Rule Italy 1948 only - Oct 3 2:00s 0 - Rule Italy 1966 1968 - May Sun>=22 0:00s 1:00 S Rule Italy 1966 only - Sep 24 24:00 0 - Rule Italy 1967 1969 - Sep Sun>=22 0:00s 0 - Rule Italy 1969 only - Jun 1 0:00s 1:00 S Rule Italy 1970 only - May 31 0:00s 1:00 S Rule Italy 1970 only - Sep lastSun 0:00s 0 - Rule Italy 1971 1972 - May Sun>=22 0:00s 1:00 S Rule Italy 1971 only - Sep lastSun 0:00s 0 - Rule Italy 1972 only - Oct 1 0:00s 0 - Rule Italy 1973 only - Jun 3 0:00s 1:00 S Rule Italy 1973 1974 - Sep lastSun 0:00s 0 - Rule Italy 1974 only - May 26 0:00s 1:00 S Rule Italy 1975 only - Jun 1 0:00s 1:00 S Rule Italy 1975 1977 - Sep lastSun 0:00s 0 - Rule Italy 1976 only - May 30 0:00s 1:00 S Rule Italy 1977 1979 - May Sun>=22 0:00s 1:00 S Rule Italy 1978 only - Oct 1 0:00s 0 - Rule Italy 1979 only - Sep 30 0:00s 0 - # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Europe/Rome 0:49:56 - LMT 1866 Dec 12 0:49:56 - RMT 1893 Oct 31 23:00u # Rome Mean 1:00 Italy CE%sT 1943 Sep 10 1:00 C-Eur CE%sT 1944 Jun 4 1:00 Italy CE%sT 1980 1:00 EU CE%sT # Latvia # From Liene Kanepe (1998-09-17): # I asked about this matter Scientific Secretary of the Institute of Astronomy # of The University of Latvia Dr. paed Mr. Ilgonis Vilks. I also searched the # correct data in juridical acts and I found some juridical documents about # changes in the counting of time in Latvia from 1981.... # # Act No. 35 of the Council of Ministers of Latvian SSR of 1981-01-22 ... # according to the Act No. 925 of the Council of Ministers of USSR of 1980-10-24 # ...: all year round the time of 2nd time zone + 1 hour, in addition turning # the hands of the clock 1 hour forward on 1 April at 00:00 (GMT 31 March 21:00) # and 1 hour backward on the 1 October at 00:00 (GMT 30 September 20:00). # # Act No. 592 of the Council of Ministers of Latvian SSR of 1984-09-24 ... # according to the Act No. 967 of the Council of Ministers of USSR of 1984-09-13 # ...: all year round the time of 2nd time zone + 1 hour, in addition turning # the hands of the clock 1 hour forward on the last Sunday of March at 02:00 # (GMT 23:00 on the previous day) and 1 hour backward on the last Sunday of # September at 03:00 (GMT 23:00 on the previous day). # # Act No. 81 of the Council of Ministers of Latvian SSR of 1989-03-22 ... # according to the Act No. 227 of the Council of Ministers of USSR of 1989-03-14 # ...: since the last Sunday of March 1989 in Lithuanian SSR, Latvian SSR, # Estonian SSR and Kaliningrad region of Russian Federation all year round the # time of 2nd time zone (Moscow time minus one hour). On the territory of Latvia # transition to summer time is performed on the last Sunday of March at 02:00 # (GMT 00:00), turning the hands of the clock 1 hour forward. The end of # daylight saving time is performed on the last Sunday of September at 03:00 # (GMT 00:00), turning the hands of the clock 1 hour backward. Exception is # 1989-03-26, when we must not turn the hands of the clock.... # # The Regulations of the Cabinet of Ministers of the Republic of Latvia of # 1997-01-21 on transition to Summer time ... established the same order of # daylight savings time settings as in the States of the European Union. # From Andrei Ivanov (2000-03-06): # This year Latvia will not switch to Daylight Savings Time (as specified in # The Regulations of the Cabinet of Ministers of the Rep. of Latvia of # 29-Feb-2000 (No. 79) , # in Latvian for subscribers only). # From RFE/RL Newsline # http://www.rferl.org/newsline/2001/01/3-CEE/cee-030101.html # (2001-01-03), noted after a heads-up by Rives McDow: # The Latvian government on 2 January decided that the country will # institute daylight-saving time this spring, LETA reported. # Last February the three Baltic states decided not to turn back their # clocks one hour in the spring.... # Minister of Economy Aigars Kalvītis noted that Latvia had too few # daylight hours and thus decided to comply with a draft European # Commission directive that provides for instituting daylight-saving # time in EU countries between 2002 and 2006. The Latvian government # urged Lithuania and Estonia to adopt a similar time policy, but it # appears that they will not do so.... # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Latvia 1989 1996 - Mar lastSun 2:00s 1:00 S Rule Latvia 1989 1996 - Sep lastSun 2:00s 0 - # Milne 1899 says Riga was 1:36:28 (Polytechnique House time). # Byalokoz 1919 says Latvia was 1:36:34. # Go with Byalokoz. # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Europe/Riga 1:36:34 - LMT 1880 1:36:34 - RMT 1918 Apr 15 2:00 # Riga MT 1:36:34 1:00 LST 1918 Sep 16 3:00 # Latvian ST 1:36:34 - RMT 1919 Apr 1 2:00 1:36:34 1:00 LST 1919 May 22 3:00 1:36:34 - RMT 1926 May 11 2:00 - EET 1940 Aug 5 3:00 - MSK 1941 Jul 1:00 C-Eur CE%sT 1944 Oct 13 3:00 Russia MSK/MSD 1989 Mar lastSun 2:00s 2:00 1:00 EEST 1989 Sep lastSun 2:00s 2:00 Latvia EE%sT 1997 Jan 21 2:00 EU EE%sT 2000 Feb 29 2:00 - EET 2001 Jan 2 2:00 EU EE%sT # Lithuania # From Paul Eggert (2016-03-18): # The 1989 transition is from USSR act No. 227 (1989-03-14). # From Paul Eggert (1996-11-22): # IATA SSIM (1992/1996) says Lithuania uses W-Eur rules, but since it is # known to be wrong about Estonia and Latvia, assume it's wrong here too. # From Marius Gedminas (1998-08-07): # I would like to inform that in this year Lithuanian time zone # (Europe/Vilnius) was changed. # From ELTA No. 972 (2582) (1999-09-29) , # via Steffen Thorsen: # Lithuania has shifted back to the second time zone (GMT plus two hours) # to be valid here starting from October 31, # as decided by the national government on Wednesday.... # The Lithuanian government also announced plans to consider a # motion to give up shifting to summer time in spring, as it was # already done by Estonia. # From the Fact File, Lithuanian State Department of Tourism # (2000-03-27): # Local time is GMT+2 hours ..., no daylight saving. # From a user via Klaus Marten (2003-02-07): # As a candidate for membership of the European Union, Lithuania will # observe Summer Time in 2003, changing its clocks at the times laid # down in EU Directive 2000/84 of 19.I.01 (i.e. at the same times as its # neighbour Latvia). The text of the Lithuanian government Order of # 7.XI.02 to this effect can be found at # http://www.lrvk.lt/nut/11/n1749.htm # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Europe/Vilnius 1:41:16 - LMT 1880 1:24:00 - WMT 1917 # Warsaw Mean Time 1:35:36 - KMT 1919 Oct 10 # Kaunas Mean Time 1:00 - CET 1920 Jul 12 2:00 - EET 1920 Oct 9 1:00 - CET 1940 Aug 3 3:00 - MSK 1941 Jun 24 1:00 C-Eur CE%sT 1944 Aug 3:00 Russia MSK/MSD 1989 Mar 26 2:00s 2:00 Russia EE%sT 1991 Sep 29 2:00s 2:00 C-Eur EE%sT 1998 2:00 - EET 1998 Mar 29 1:00u 1:00 EU CE%sT 1999 Oct 31 1:00u 2:00 - EET 2003 Jan 1 2:00 EU EE%sT # Malta # # From Paul Eggert (2016-10-21): # Assume 1900-1972 was like Rome, overriding Shanks. # # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Malta 1973 only - Mar 31 0:00s 1:00 S Rule Malta 1973 only - Sep 29 0:00s 0 - Rule Malta 1974 only - Apr 21 0:00s 1:00 S Rule Malta 1974 only - Sep 16 0:00s 0 - Rule Malta 1975 1979 - Apr Sun>=15 2:00 1:00 S Rule Malta 1975 1980 - Sep Sun>=15 2:00 0 - Rule Malta 1980 only - Mar 31 2:00 1:00 S # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Europe/Malta 0:58:04 - LMT 1893 Nov 2 # Valletta 1:00 Italy CE%sT 1973 Mar 31 1:00 Malta CE%sT 1981 1:00 EU CE%sT # Moldova # From Stepan Golosunov (2016-03-07): # the act of the government of the Republic of Moldova Nr. 132 from 1990-05-04 # http://lex.justice.md/viewdoc.php?action=view&view=doc&id=298782&lang=2 # ... says that since 1990-05-06 on the territory of the Moldavian SSR # time would be calculated as the standard time of the second time belt # plus one hour of the "summer" time. To implement that clocks would be # adjusted one hour backwards at 1990-05-06 2:00. After that "summer" # time would be cancelled last Sunday of September at 3:00 and # reintroduced last Sunday of March at 2:00. # From Paul Eggert (2006-03-22): # A previous version of this database followed Shanks & Pottenger, who write # that Tiraspol switched to Moscow time on 1992-01-19 at 02:00. # However, this is most likely an error, as Moldova declared independence # on 1991-08-27 (the 1992-01-19 date is that of a Russian decree). # In early 1992 there was large-scale interethnic violence in the area # and it's possible that some Russophones continued to observe Moscow time. # But [two people] separately reported via # Jesper Nørgaard that as of 2001-01-24 Tiraspol was like Chisinau. # The Tiraspol entry has therefore been removed for now. # # From Alexander Krivenyshev (2011-10-17): # Pridnestrovian Moldavian Republic (PMR, also known as # "Pridnestrovie") has abolished seasonal clock change (no transition # to the Winter Time). # # News (in Russian): # http://www.kyivpost.ua/russia/news/pridnestrove-otkazalos-ot-perehoda-na-zimnee-vremya-30954.html # http://www.allmoldova.com/moldova-news/1249064116.html # # The substance of this change (reinstatement of the Tiraspol entry) # is from a patch from Petr Machata (2011-10-17) # # From Tim Parenti (2011-10-19) # In addition, being situated at +4651+2938 would give Tiraspol # a pre-1880 LMT offset of 1:58:32. # # (which agrees with the earlier entry that had been removed) # # From Alexander Krivenyshev (2011-10-26) # NO need to divide Moldova into two timezones at this point. # As of today, Transnistria (Pridnestrovie)- Tiraspol reversed its own # decision to abolish DST this winter. # Following Moldova and neighboring Ukraine- Transnistria (Pridnestrovie)- # Tiraspol will go back to winter time on October 30, 2011. # News from Moldova (in russian): # https://ru.publika.md/link_317061.html # From Roman Tudos (2015-07-02): # http://lex.justice.md/index.php?action=view&view=doc&lang=1&id=355077 # From Paul Eggert (2015-07-01): # The abovementioned official link to IGO1445-868/2014 states that # 2014-10-26's fallback transition occurred at 03:00 local time. Also, # https://www.trm.md/en/social/la-30-martie-vom-trece-la-ora-de-vara # says the 2014-03-30 spring-forward transition was at 02:00 local time. # Guess that since 1997 Moldova has switched one hour before the EU. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Moldova 1997 max - Mar lastSun 2:00 1:00 S Rule Moldova 1997 max - Oct lastSun 3:00 0 - # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Europe/Chisinau 1:55:20 - LMT 1880 1:55 - CMT 1918 Feb 15 # Chisinau MT 1:44:24 - BMT 1931 Jul 24 # Bucharest MT 2:00 Romania EE%sT 1940 Aug 15 2:00 1:00 EEST 1941 Jul 17 1:00 C-Eur CE%sT 1944 Aug 24 3:00 Russia MSK/MSD 1990 May 6 2:00 2:00 Russia EE%sT 1992 2:00 E-Eur EE%sT 1997 # See Romania commentary for the guessed 1997 transition to EU rules. 2:00 Moldova EE%sT # Poland # The 1919 dates and times can be found in Tygodnik Urzędowy nr 1 (1919-03-20), # pp 1-2. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Poland 1918 1919 - Sep 16 2:00s 0 - Rule Poland 1919 only - Apr 15 2:00s 1:00 S Rule Poland 1944 only - Apr 3 2:00s 1:00 S # Whitman gives 1944 Nov 30; go with Shanks & Pottenger. Rule Poland 1944 only - Oct 4 2:00 0 - # For 1944-1948 Whitman gives the previous day; go with Shanks & Pottenger. Rule Poland 1945 only - Apr 29 0:00 1:00 S Rule Poland 1945 only - Nov 1 0:00 0 - # For 1946 on the source is Kazimierz Borkowski, # Toruń Center for Astronomy, Dept. of Radio Astronomy, Nicolaus Copernicus U., # https://www.astro.uni.torun.pl/~kb/Artykuly/U-PA/Czas2.htm#tth_tAb1 # Thanks to Przemysław Augustyniak (2005-05-28) for this reference. # He also gives these further references: # Mon Pol nr 13, poz 162 (1995) # Druk nr 2180 (2003) Rule Poland 1946 only - Apr 14 0:00s 1:00 S Rule Poland 1946 only - Oct 7 2:00s 0 - Rule Poland 1947 only - May 4 2:00s 1:00 S Rule Poland 1947 1949 - Oct Sun>=1 2:00s 0 - Rule Poland 1948 only - Apr 18 2:00s 1:00 S Rule Poland 1949 only - Apr 10 2:00s 1:00 S Rule Poland 1957 only - Jun 2 1:00s 1:00 S Rule Poland 1957 1958 - Sep lastSun 1:00s 0 - Rule Poland 1958 only - Mar 30 1:00s 1:00 S Rule Poland 1959 only - May 31 1:00s 1:00 S Rule Poland 1959 1961 - Oct Sun>=1 1:00s 0 - Rule Poland 1960 only - Apr 3 1:00s 1:00 S Rule Poland 1961 1964 - May lastSun 1:00s 1:00 S Rule Poland 1962 1964 - Sep lastSun 1:00s 0 - # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Europe/Warsaw 1:24:00 - LMT 1880 1:24:00 - WMT 1915 Aug 5 # Warsaw Mean Time 1:00 C-Eur CE%sT 1918 Sep 16 3:00 2:00 Poland EE%sT 1922 Jun 1:00 Poland CE%sT 1940 Jun 23 2:00 1:00 C-Eur CE%sT 1944 Oct 1:00 Poland CE%sT 1977 1:00 W-Eur CE%sT 1988 1:00 EU CE%sT # Portugal # From Tim Parenti (2024-07-01), per Alois Treindl (2021-02-07) and Michael # Deckers (2021-02-10): # http://oal.ul.pt/documentos/2018/01/hl1911a2018.pdf/ # The Astronomical Observatory of Lisbon has published a list detailing the # historical transitions in legal time within continental Portugal. It # directly references many decrees and ordinances which are, in turn, # referenced below. They can be viewed in the public archives of the Diário da # República (until 1976-04-09 known as the Diário do Govêrno) at # https://dre.pt/ (in Portuguese). # # Most of the Rules below have been updated simply to match the Observatory's # listing for continental (mainland) Portugal. Although there are over 50 # referenced decrees and ordinances, only the handful with comments below have # been verified against the text, typically to provide additional confidence # wherever dates provided by Whitman and Shanks & Pottenger had disagreed. # See further below for the Azores and Madeira. # From Tim Parenti (2024-07-01), per Paul Eggert (2014-08-11), after a # heads-up from Stephen Colebourne: # According to a 1911-05-24 Portuguese decree, Lisbon was at -0:36:44.68, but # switched to GMT on 1912-01-01 at 00:00. # https://dre.pt/dr/detalhe/decreto/593090 # https://dre.pt/application/conteudo/593090 # The decree made legal time throughout Portugal and her possessions # "subordinate to the Greenwich meridian, according to the principle adopted at # the Washington Convention in 1884" and eliminated the "difference of five # minutes between the internal and external clocks of railway stations". # # The decree was gazetted in the 1911-05-30 issue of Diário do Govêrno, and is # considered to be dated 1911-05-24 by that issue's summary; however, the text # of the decree itself is dated 1911-05-26. The Diário da República website # notes the discrepancy, but later laws and the Observatory all seem to refer # to this decree by the 1911-05-24 date. # # From Michael Deckers (2018-02-15): # article 5 [of the 1911 decree; Deckers's translation] ...: # These dispositions shall enter into force at the instant at which, # according to the 2nd article, the civil day January 1, 1912 begins, # all clocks therefore having to be advanced or set back correspondingly ... # Rule NAME FROM TO - IN ON AT SAVE LETTER/S # From Tim Parenti (2024-07-01), per Paul Eggert (1999-01-30): # DSH writes in their history that Decreto 1469 of 1915-03-30 established # summer time and that, "despite" this, the change to the clocks was not done # every year, depending on what Spain did, because of railroad schedules. # In fact, that decree had nothing to do with DST; rather, it regulated the # sending of time signals. But we do see linkage to Spain in the 1920s below. # https://dre.pt/dr/detalhe/decreto/1469-1915-285721 # https://dre.pt/application/conteudo/285721 # # According to the Observatory, standard time was first advanced by Decreto # 2433 of 1916-06-09 and restored by Decreto 2712 of 1916-10-28. While Whitman # gives 1916-10-31 for the latter transition, Shanks & Pottenger agrees more # closely with the decree, which stated that its provision "will start sixty # minutes after the end of 31 October, according to the current time," i.e., # 01:00 on 1 November. # https://dre.pt/dr/detalhe/decreto/2433-1916-267192 # https://dre.pt/application/conteudo/267192 # https://dre.pt/dr/detalhe/decreto/2712-1916-590937 # https://dre.pt/application/conteudo/590937 Rule Port 1916 only - Jun 17 23:00 1:00 S Rule Port 1916 only - Nov 1 1:00 0 - # From Tim Parenti (2024-07-01): # Article 7 of Decreto 2922 of 1916-12-30 stated that "the legal time will be # advanced by sixty minutes from 1 March to 31 October." Per Article 15, this # came into force from 1917-01-01. Just before the first fall back, Decreto # 3446 of 1917-10-11 changed the annual end date to 14 October. # https://dre.pt/dr/detalhe/decreto/2922-1916-261894 # https://dre.pt/application/conteudo/261894 # https://dre.pt/dr/detalhe/decreto/3446-1917-495161 # https://dre.pt/application/conteudo/495161 # This annual change was revoked by Decreto 8038 of 1922-02-18. # https://dre.pt/dr/detalhe/decreto/8038-1922-569751 # https://dre.pt/application/conteudo/569751 Rule Port 1917 1921 - Mar 1 0:00 1:00 S Rule Port 1917 1921 - Oct 14 24:00 0 - # From Tim Parenti (2024-07-01): # Decreto 9592 of 1924-04-14 noted that "France maintains the advance of legal # time in the summer and Spain has now adopted it for the first time" and # considered "that the absence of similar measures would cause serious # difficulties for international rail connections with consequent repercussions # on domestic service hours..." along with "inconvenient analogues...for postal # and telegraph services." Summer time would be in effect from 17 April to 4 # October, with the spring change explicitly specified by bringing clocks # forward from 16 April 23:00. # https://dre.pt/dr/detalhe/decreto/9592-1924-652133 # https://dre.pt/application/conteudo/652133 # # Decreto 10700, issued 1925-04-16, noted that Spain had not continued summer # time, declared that "the current legal hour prior to 17 April remains # unchanged from that day forward", and revoked legislation to the contrary, # just a day before summer time would have otherwise resumed. # https://dre.pt/dr/detalhe/decreto/10700-1925-437826 # https://dre.pt/application/conteudo/437826 Rule Port 1924 only - Apr 16 23:00s 1:00 S Rule Port 1924 only - Oct 4 23:00s 0 - Rule Port 1926 only - Apr 17 23:00s 1:00 S Rule Port 1926 1929 - Oct Sat>=1 23:00s 0 - Rule Port 1927 only - Apr 9 23:00s 1:00 S Rule Port 1928 only - Apr 14 23:00s 1:00 S Rule Port 1929 only - Apr 20 23:00s 1:00 S Rule Port 1931 only - Apr 18 23:00s 1:00 S # Whitman gives 1931 Oct 8; go with Shanks & Pottenger. Rule Port 1931 1932 - Oct Sat>=1 23:00s 0 - Rule Port 1932 only - Apr 2 23:00s 1:00 S Rule Port 1934 only - Apr 7 23:00s 1:00 S # Whitman gives 1934 Oct 5; go with Shanks & Pottenger. # Note: The 1935 law specified 10-06 00:00, not 10-05 24:00, but the following # is equivalent and more succinct. Rule Port 1934 1938 - Oct Sat>=1 23:00s 0 - # Shanks & Pottenger give 1935 Apr 30; go with Whitman. Rule Port 1935 only - Mar 30 23:00s 1:00 S Rule Port 1936 only - Apr 18 23:00s 1:00 S # Whitman gives 1937 Apr 2; go with Shanks & Pottenger. Rule Port 1937 only - Apr 3 23:00s 1:00 S Rule Port 1938 only - Mar 26 23:00s 1:00 S Rule Port 1939 only - Apr 15 23:00s 1:00 S # Whitman gives 1939 Oct 7; go with Shanks & Pottenger. Rule Port 1939 only - Nov 18 23:00s 0 - # From Tim Parenti (2024-07-01): # Portaria 9465 of 1940-02-17 advanced clocks from Saturday 1940-02-24 23:00. # The clocks were restored by Portaria 9658, issued Monday 1940-10-07, # effective from 24:00 that very night, which agrees with Shanks & Pottenger; # Whitman gives Saturday 1940-10-05 instead. # https://dre.pt/dr/detalhe/portaria/9465-1940-189096 # https://dre.pt/application/conteudo/189096 # https://dre.pt/dr/detalhe/portaria/9658-1940-196729 # https://dre.pt/application/conteudo/196729 Rule Port 1940 only - Feb 24 23:00s 1:00 S Rule Port 1940 only - Oct 7 23:00s 0 - Rule Port 1941 only - Apr 5 23:00s 1:00 S Rule Port 1941 only - Oct 5 23:00s 0 - Rule Port 1942 1945 - Mar Sat>=8 23:00s 1:00 S Rule Port 1942 only - Apr 25 22:00s 2:00 M # Midsummer Rule Port 1942 only - Aug 15 22:00s 1:00 S Rule Port 1942 1945 - Oct Sat>=24 23:00s 0 - Rule Port 1943 only - Apr 17 22:00s 2:00 M Rule Port 1943 1945 - Aug Sat>=25 22:00s 1:00 S Rule Port 1944 1945 - Apr Sat>=21 22:00s 2:00 M Rule Port 1946 only - Apr Sat>=1 23:00s 1:00 S Rule Port 1946 only - Oct Sat>=1 23:00s 0 - # From Tim Parenti (2024-07-01), per Alois Treindl (2021-02-07): # The Astronomical Observatory of Lisbon cites Portaria 11767 of 1947-03-28 for # 1947 and Portaria 12286 of 1948-02-19 for 1948. # https://dre.pt/dr/detalhe/portaria/11767-1947-414787 # https://dre.pt/application/conteudo/414787 # https://dre.pt/dr/detalhe/portaria/12286-1948-152953 # https://dre.pt/application/conteudo/152953 # # Although the latter ordinance explicitly had the 1948-10-03 transition # scheduled for 02:00 rather than 03:00 as had been used in 1947, Decreto-Lei # 37048 of 1948-09-07 recognized "that it is advisable to definitely set...the # 'summer time' regime", and fixed the fall transition at 03:00 moving forward. # https://dre.pt/dr/detalhe/decreto-lei/37048-1948-373810 # https://dre.pt/application/conteudo/373810 # While the Observatory only cites this act for 1949-1965 and not for 1948, it # does not appear to have had any provision delaying its effect, so assume that # it overrode the prior ordinance for 1948-10-03. # # Whitman says DST was not observed in 1950 and gives Oct lastSun for 1952 on. # The Observatory, however, agrees with Shanks & Pottenger that 1950 was not an # exception and that Oct Sun>=1 was maintained through 1965. Rule Port 1947 1966 - Apr Sun>=1 2:00s 1:00 S Rule Port 1947 1965 - Oct Sun>=1 2:00s 0 - # From Tim Parenti (2024-07-01): # Decreto-Lei 47233 of 1966-10-01 considered that the "duality" in time was # "the cause of serious disturbances" and noted that "the countries with which # we have the most frequent contacts...have already adopted" a solution # coinciding with the extant "summer time". It established that the former # "summer time" would apply year-round on the mainland and adjacent islands # with immediate effect, as the fall back would have otherwise occurred later # that evening. # https://dre.pt/dr/detalhe/decreto-lei/47233-1966-293729 # Model this by changing zones without changing clocks at the # previously-appointed fall back time. # # Decreto-Lei 309/76 of 1976-04-27 acknowledged that those international # contacts had returned to adopting seasonal times, and considered that the # year-round advancement "entails considerable sacrifices for the vast majority # of the working population during the winter months", including morning # visibility concerns for schoolchildren. It specified, beginning 1976-09-26 # 01:00, an annual return to UT+00 on the mainland from 00:00 UT on Sep lastSun # to 00:00 UT on Mar lastSun (unless the latter date fell on Easter, in which # case it was to be brought forward to the preceding Sunday). It also assigned # the Permanent Time Commission to study and propose revisions for the Azores # and Madeira, neither of which resumed DST until 1982 (as described further # below). # https://dre.pt/dr/detalhe/decreto-lei/309-1976-502063 Rule Port 1976 only - Sep lastSun 1:00 0 - Rule Port 1977 only - Mar lastSun 0:00s 1:00 S Rule Port 1977 only - Sep lastSun 0:00s 0 - # From Tim Parenti (2024-07-01): # Beginning in 1978, rather than triggering the Easter rule of the 1976 decree # (Easter fell on 1978-03-26), Article 5 was used instead, which allowed DST # dates to be changed by order of the Minister of Education and Scientific # Research, upon consultation with the Permanent Time Commission, "whenever # considered convenient." As such, a series of one-off ordinances were # promulgated for the mainland in 1978 through 1980, after which the 1976 # decree naturally came back into force from 1981. Rule Port 1978 1980 - Apr Sun>=1 1:00s 1:00 S Rule Port 1978 only - Oct 1 1:00s 0 - Rule Port 1979 1980 - Sep lastSun 1:00s 0 - Rule Port 1981 1986 - Mar lastSun 0:00s 1:00 S Rule Port 1981 1985 - Sep lastSun 0:00s 0 - # From Tim Parenti (2024-07-01): # Decreto-Lei 44-B/86 of 1986-03-07 switched mainland Portugal's transition # times from 0:00s to 1:00u to harmonize with the EEC from 1986-03-30. # https://dre.pt/dr/detalhe/decreto-lei/44-b-1986-628280 # (Transitions of 1:00s as previously reported and used by the W-Eur rules, # though equivalent, appear to have been fiction here.) Madeira continued to # use 0:00s for spring 1986 before joining with the mainland using 1:00u in the # fall; meanwhile, in the Azores the two were equivalent, so the law specifying # 0:00s wasn't touched until 1992. (See below for more on the islands.) # # From Rui Pedro Salgueiro (1992-11-12): # Portugal has recently (September, 27) changed timezone # (from WET to MET or CET) to harmonize with EEC. # # Martin Bruckmann (1996-02-29) reports via Peter Ilieve # that Portugal is reverting to 0:00 by not moving its clocks this spring. # The new Prime Minister was fed up with getting up in the dark in the winter. # # From Paul Eggert (1996-11-12): # IATA SSIM (1991-09) reports several 1991-09 and 1992-09 transitions # at 02:00u, not 01:00u. Assume that these are typos. # # Zone NAME STDOFF RULES FORMAT [UNTIL] #STDOFF -0:36:44.68 Zone Europe/Lisbon -0:36:45 - LMT 1884 -0:36:45 - LMT 1912 Jan 1 0:00u # Lisbon MT 0:00 Port WE%sT 1966 Oct 2 2:00s 1:00 - CET 1976 Sep 26 1:00 0:00 Port WE%sT 1986 0:00 EU WE%sT 1992 Sep 27 1:00u 1:00 EU CE%sT 1996 Mar 31 1:00u 0:00 EU WE%sT # From Tim Parenti (2024-07-01): # For the Azores and Madeira, legislation was followed from the laws currently # in force as listed at: # https://oal.ul.pt/hora-legal/legislacao/ # working backward through references of revocation and abrogation to # Decreto-Lei 47233 of 1966-10-01, the last time DST was abolished across the # mainland and its adjacent islands. Because of that reference, it is # therefore assumed that DST rules in the islands prior to 1966 were like that # of the mainland, though most legislation of the time didn't explicitly # specify DST practices for the islands. Zone Atlantic/Azores -1:42:40 - LMT 1884 # Ponta Delgada -1:54:32 - HMT 1912 Jan 1 2:00u # Horta MT # Vanguard section, for zic and other parsers that support %z. -2:00 Port %z 1966 Oct 2 2:00s # From Tim Parenti (2024-07-01): # While Decreto-Lei 309/76 of 1976-04-27 reintroduced DST on the mainland by # falling back on 1976-09-26, it assigned the Permanent Time Commission to # study and propose revisions for the Azores and Madeira. Decreto Regional # 9/77/A of 1977-05-17 affirmed that "the legal time remained unchanged in the # Azores" at UT-1, and would remain there year-round. # https://dre.pt/dr/detalhe/decreto-regional/9-1977-252066 # # Decreto Regional 2/82/A, published 1982-03-02, adopted DST in the same # fashion as the mainland used at the time. # https://dre.pt/dr/detalhe/decreto-regional/2-1982-599965 # Though transitions in the Azores officially remained at 0:00s through 1992, # this was equivalent to the EU-style 1:00u adopted by the mainland in 1986, so # model it as such. -1:00 - %z 1982 Mar 28 0:00s -1:00 Port %z 1986 # Rearguard section, for parsers lacking %z; see ziguard.awk. # -2:00 Port -02/-01 1942 Apr 25 22:00s # -2:00 Port +00 1942 Aug 15 22:00s # -2:00 Port -02/-01 1943 Apr 17 22:00s # -2:00 Port +00 1943 Aug 28 22:00s # -2:00 Port -02/-01 1944 Apr 22 22:00s # -2:00 Port +00 1944 Aug 26 22:00s # -2:00 Port -02/-01 1945 Apr 21 22:00s # -2:00 Port +00 1945 Aug 25 22:00s # -2:00 Port -02/-01 1966 Oct 2 2:00s # -1:00 - -01 1982 Mar 28 0:00s # -1:00 Port -01/+00 1986 # End of rearguard section. # # From Paul Eggert (1996-11-12): # IATA SSIM (1991/1992) reports that the Azores were at -1:00. # IATA SSIM (1993-02) says +0:00; later issues (through 1996-09) say -1:00. # # From Tim Parenti (2024-07-01): # After mainland Portugal had shifted forward an hour from 1992-09-27, Decreto # Legislativo Regional 29/92/A of 1992-12-23 sought to "reduce the time # difference" by shifting the Azores forward as well from 1992-12-27. Just six # months later, this was revoked by Decreto Legislativo Regional 9/93/A, citing # "major changes in work habits and way of life." Though the revocation didn't # give a transition time, it was signed Wednesday 1993-06-16; assume it took # effect later that evening, and that an EU-style spring forward (to +01) was # still observed in the interim on 1993-03-28. # https://dre.pt/dr/detalhe/decreto-legislativo-regional/29-1992-621553 # https://dre.pt/dr/detalhe/decreto-legislativo-regional/9-1993-389633 -1:00 EU %z 1992 Dec 27 1:00s 0:00 EU WE%sT 1993 Jun 17 1:00u -1:00 EU %z Zone Atlantic/Madeira -1:07:36 - LMT 1884 # Funchal -1:07:36 - FMT 1912 Jan 1 1:00u # Funchal MT # Vanguard section, for zic and other parsers that support %z. -1:00 Port %z 1966 Oct 2 2:00s # Rearguard section, for parsers lacking %z; see ziguard.awk. # -1:00 Port -01/+00 1942 Apr 25 22:00s # -1:00 Port +01 1942 Aug 15 22:00s # -1:00 Port -01/+00 1943 Apr 17 22:00s # -1:00 Port +01 1943 Aug 28 22:00s # -1:00 Port -01/+00 1944 Apr 22 22:00s # -1:00 Port +01 1944 Aug 26 22:00s # -1:00 Port -01/+00 1945 Apr 21 22:00s # -1:00 Port +01 1945 Aug 25 22:00s # -1:00 Port -01/+00 1966 Oct 2 2:00s # End of rearguard section. # # From Tim Parenti (2024-07-01): # Decreto Regional 5/82/M, published 1982-04-03, established DST transitions at # 0:00u, which for Madeira is equivalent to the mainland's rules (0:00s) at the # time. It came into effect the day following its publication, Sunday # 1982-04-04, thus resuming Madeira's DST practice about a week later than the # mainland and the Azores. # https://dre.pt/dr/detalhe/decreto-regional/5-1982-608273 # # Decreto Legislativo Regional 18/86/M, published 1986-10-01, adopted EU-style # rules (1:00u) and entered into immediate force after being signed on # 1986-07-31. # https://dre.pt/dr/detalhe/decreto-legislativo-regional/18-1986-221705 0:00 - WET 1982 Apr 4 0:00 Port WE%sT 1986 Jul 31 0:00 EU WE%sT # Romania # # From Paul Eggert (1999-10-07): # Nine O'clock # (1998-10-23) reports that the switch occurred at # 04:00 local time in fall 1998. For lack of better info, # assume that Romania and Moldova switched to EU rules in 1997, # the same year as Bulgaria. # # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Romania 1932 only - May 21 0:00s 1:00 S Rule Romania 1932 1939 - Oct Sun>=1 0:00s 0 - Rule Romania 1933 1939 - Apr Sun>=2 0:00s 1:00 S Rule Romania 1979 only - May 27 0:00 1:00 S Rule Romania 1979 only - Sep lastSun 0:00 0 - Rule Romania 1980 only - Apr 5 23:00 1:00 S Rule Romania 1980 only - Sep lastSun 1:00 0 - Rule Romania 1991 1993 - Mar lastSun 0:00s 1:00 S Rule Romania 1991 1993 - Sep lastSun 0:00s 0 - # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Europe/Bucharest 1:44:24 - LMT 1891 Oct 1:44:24 - BMT 1931 Jul 24 # Bucharest MT 2:00 Romania EE%sT 1981 Mar 29 2:00s 2:00 C-Eur EE%sT 1991 2:00 Romania EE%sT 1994 2:00 E-Eur EE%sT 1997 2:00 EU EE%sT # Russia # From Alexander Krivenyshev (2011-09-15): # Based on last Russian Government Decree No. 725 on August 31, 2011 # (Government document # http://www.government.ru/gov/results/16355/print/ # in Russian) # there are few corrections have to be made for some Russian time zones... # All updated Russian Time Zones were placed in table and translated to English # by WorldTimeZone.com at the link below: # http://www.worldtimezone.com/dst_news/dst_news_russia36.htm # From Sanjeev Gupta (2011-09-27): # Scans of [Decree No. 23 of January 8, 1992] are available at: # http://government.consultant.ru/page.aspx?1223966 # They are in Cyrillic letters (presumably Russian). # From Arthur David Olson (2012-05-09): # Regarding the instant when clocks in time-zone-shifting parts of Russia # changed in September 2011: # # One source is # http://government.ru/gov/results/16355/ # which, according to translate.google.com, begins "Decree of August 31, # 2011 No. 725" and contains no other dates or "effective date" information. # # Another source is # https://rg.ru/2011/09/06/chas-zona-dok.html # which, according to translate.google.com, begins "Resolution of the # Government of the Russian Federation on August 31, 2011 N 725" and also # contains "Date first official publication: September 6, 2011 Posted on: # in the 'RG' - Federal Issue No. 5573 September 6, 2011" but which # does not contain any "effective date" information. # # Another source is # https://en.wikipedia.org/wiki/Oymyakonsky_District#cite_note-RuTime-7 # which, in note 8, contains "Resolution No. 725 of August 31, 2011... # Effective as of after 7 days following the day of the official publication" # but which does not contain any reference to September 6, 2011. # # The Wikipedia article refers to # http://base.consultant.ru/cons/cgi/online.cgi?req=doc;base=LAW;n=118896 # which seems to copy the text of the government.ru page. # # Tobias Conradi combines Wikipedia's # "as of after 7 days following the day of the official publication" # with www.rg.ru's "Date of first official publication: September 6, 2011" to # get September 13, 2011 as the cutover date (unusually, a Tuesday, as Tobias # Conradi notes). # # None of the sources indicates a time of day for changing clocks. # # Go with 2011-09-13 0:00s. # From Alexander Krivenyshev (2014-07-01): # According to the Russian news (ITAR-TASS News Agency) # http://en.itar-tass.com/russia/738562 # the State Duma has approved ... the draft bill on returning to # winter time standard and return Russia 11 time zones. The new # regulations will come into effect on October 26, 2014 at 02:00 ... # http://asozd2.duma.gov.ru/main.nsf/(Spravka)?OpenAgent&RN=431985-6&02 # Here is a link where we put together table (based on approved Bill N # 431985-6) with proposed 11 Russian time zones and corresponding # areas/cities/administrative centers in the Russian Federation (in English): # http://www.worldtimezone.com/dst_news/dst_news_russia65.html # # From Alexander Krivenyshev (2014-07-22): # Putin signed the Federal Law 431985-6 ... (in Russian) # http://itar-tass.com/obschestvo/1333711 # http://www.pravo.gov.ru:8080/page.aspx?111660 # http://www.kremlin.ru/acts/46279 # From October 26, 2014 the new Russian time zone map will look like this: # http://www.worldtimezone.com/dst_news/dst_news_russia-map-2014-07.html # From Paul Eggert (2006-03-22): # Moscow time zone abbreviations after 1919-07-01, and Moscow rules after 1991, # are from Andrey A. Chernov. The rest is from Shanks & Pottenger, # except we follow Chernov's report that 1992 DST transitions were Sat # 23:00, not Sun 02:00s. # # From Stanislaw A. Kuzikowski (1994-06-29): # But now it is some months since Novosibirsk is 3 hours ahead of Moscow! # I do not know why they have decided to make this change; # as far as I remember it was done exactly during winter->summer switching # so we (Novosibirsk) simply did not switch. # # From Andrey A. Chernov (1996-10-04): # 'MSK' and 'MSD' were born and used initially on Moscow computers with # UNIX-like OSes by several developer groups (e.g. Demos group, Kiae group).... # The next step was the UUCP network, the Relcom predecessor # (used mainly for mail), and MSK/MSD was actively used there. # # From Chris Carrier (1996-10-30): # According to a friend of mine who rode the Trans-Siberian Railroad from # Moscow to Irkutsk in 1995, public air and rail transport in Russia ... # still follows Moscow time, no matter where in Russia it is located. # # For Grozny, Chechnya, we have the following story from # John Daniszewski, "Scavengers in the Rubble", Los Angeles Times (2001-02-07): # News - often false - is spread by word of mouth. A rumor that it was # time to move the clocks back put this whole city out of sync with # the rest of Russia for two weeks - even soldiers stationed here began # enforcing curfew at the wrong time. # # From Gwillim Law (2001-06-05): # There's considerable evidence that Sakhalin Island used to be in # UTC+11, and has changed to UTC+10, in this decade. I start with the # SSIM, which listed Yuzhno-Sakhalinsk in zone RU10 along with Magadan # until February 1997, and then in RU9 with Khabarovsk and Vladivostok # since September 1997.... Although the Kuril Islands are # administratively part of Sakhalin oblast', they appear to have # remained on UTC+11 along with Magadan. # From Marat Nigametzianov (2018-07-16): # this is link to order from 1956 about timezone in USSR # http://astro.uni-altai.ru/~orion/blog/2011/11/novyie-granitsyi-chasovyih-poyasov-v-sssr/ # # From Paul Eggert (2018-07-16): # Perhaps someone could translate the above-mentioned link and use it # to correct our data for the ex-Soviet Union. It cites the following: # «Поясное время и новые границы часовых поясов» / сост. П.Н. Долгов, # отв. ред. Г.Д. Бурдун - М: Комитет стандартов, мер и измерительных # приборов при Совете Министров СССР, Междуведомственная комиссия # единой службы времени, 1956 г. # This book looks like it would be a helpful resource for the Soviet # Union through 1956. Although a copy was in the Scientific Library # of Tomsk State University, I have not been able to track down a copy nearby. # # From Stepan Golosunov (2018-07-21): # http://astro.uni-altai.ru/~orion/blog/2015/05/center-reforma-ischisleniya-vremeni-br-na-territorii-sssr-v-1957-godu-center/ # says that the 1956 decision to change time belts' borders was not # implemented as planned in 1956 and the change happened in 1957. # There is also the problem that actual time zones were different from # the official time belts (and from many time belts' maps) as there were # numerous exceptions to application of time belt rules. For example, # https://ru.wikipedia.org/wiki/Московское_время#Перемещение_границы_применения_московского_времени_на_восток # says that by 1962 there were many regions in the 3rd time belt that # were on Moscow time, referring to a 1962 map. By 1989 number of such # exceptions grew considerably. # From Tim Parenti (2014-07-06): # The comments detailing the coverage of each Russian zone are meant to assist # with maintenance only and represent our best guesses as to which regions # are covered by each zone. They are not meant to be taken as an authoritative # listing. The region codes listed come from # https://en.wikipedia.org/w/?title=Federal_subjects_of_Russia&oldid=611810498 # and are used for convenience only; no guarantees are made regarding their # future stability. ISO 3166-2:RU codes are also listed for first-level # divisions where available. # From Tim Parenti (2014-07-03): # Europe/Kaliningrad covers... # 39 RU-KGD Kaliningrad Oblast # From Paul Eggert (2019-07-25): # Although Shanks lists 1945-01-01 as the date for transition from # +01/+02 to +02/+03, more likely this is a placeholder. Guess that # the transition occurred at 1945-04-10 00:00, which is about when # Königsberg surrendered to Soviet troops. (Thanks to Alois Treindl.) # From Paul Eggert (2016-03-18): # The 1989 transition is from USSR act No. 227 (1989-03-14). # From Stepan Golosunov (2016-03-07): # http://www.rgo.ru/ru/kaliningradskoe-oblastnoe-otdelenie/ob-otdelenii/publikacii/kak-nam-zhilos-bez-letnego-vremeni # confirms that the 1989 change to Moscow-1 was implemented. # (The article, though, is misattributed to 1990 while saying that # summer->winter transition would be done on the 24 of September. But # 1990-09-24 was Monday, while 1989-09-24 was Sunday as expected.) # ... # http://www.kaliningradka.ru/site_pc/cherez/index.php?ELEMENT_ID=40091 # says that Kaliningrad switched to Moscow-1 on 1989-03-26, avoided # at the last moment switch to Moscow-1 on 1991-03-31, switched to # Moscow on 1991-11-03, switched to Moscow-1 on 1992-01-19. Zone Europe/Kaliningrad 1:22:00 - LMT 1893 Apr 1:00 C-Eur CE%sT 1945 Apr 10 2:00 Poland EE%sT 1946 Apr 7 3:00 Russia MSK/MSD 1989 Mar 26 2:00s 2:00 Russia EE%sT 2011 Mar 27 2:00s 3:00 - %z 2014 Oct 26 2:00s 2:00 - EET # From Paul Eggert (2016-02-21), per Tim Parenti (2014-07-03) and # Oscar van Vlijmen (2001-08-25): # Europe/Moscow covers... # 01 RU-AD Adygea, Republic of # 05 RU-DA Dagestan, Republic of # 06 RU-IN Ingushetia, Republic of # 07 RU-KB Kabardino-Balkar Republic # 08 RU-KL Kalmykia, Republic of # 09 RU-KC Karachay-Cherkess Republic # 10 RU-KR Karelia, Republic of # 11 RU-KO Komi Republic # 12 RU-ME Mari El Republic # 13 RU-MO Mordovia, Republic of # 15 RU-SE North Ossetia-Alania, Republic of # 16 RU-TA Tatarstan, Republic of # 20 RU-CE Chechen Republic # 21 RU-CU Chuvash Republic # 23 RU-KDA Krasnodar Krai # 26 RU-STA Stavropol Krai # 29 RU-ARK Arkhangelsk Oblast # 31 RU-BEL Belgorod Oblast # 32 RU-BRY Bryansk Oblast # 33 RU-VLA Vladimir Oblast # 35 RU-VLG Vologda Oblast # 36 RU-VOR Voronezh Oblast # 37 RU-IVA Ivanovo Oblast # 40 RU-KLU Kaluga Oblast # 44 RU-KOS Kostroma Oblast # 46 RU-KRS Kursk Oblast # 47 RU-LEN Leningrad Oblast # 48 RU-LIP Lipetsk Oblast # 50 RU-MOS Moscow Oblast # 51 RU-MUR Murmansk Oblast # 52 RU-NIZ Nizhny Novgorod Oblast # 53 RU-NGR Novgorod Oblast # 57 RU-ORL Oryol Oblast # 58 RU-PNZ Penza Oblast # 60 RU-PSK Pskov Oblast # 61 RU-ROS Rostov Oblast # 62 RU-RYA Ryazan Oblast # 67 RU-SMO Smolensk Oblast # 68 RU-TAM Tambov Oblast # 69 RU-TVE Tver Oblast # 71 RU-TUL Tula Oblast # 76 RU-YAR Yaroslavl Oblast # 77 RU-MOW Moscow # 78 RU-SPE Saint Petersburg # 83 RU-NEN Nenets Autonomous Okrug # From Paul Eggert (2016-08-23): # The Soviets switched to UT-based time in 1919. Decree No. 59 # (1919-02-08) http://istmat.info/node/35567 established UT-based time # zones, and Decree No. 147 (1919-03-29) http://istmat.info/node/35854 # specified a transition date of 1919-07-01, apparently at 00:00 UT. # No doubt only the Soviet-controlled regions switched on that date; # later transitions to UT-based time in other parts of Russia are # taken from what appear to be guesses by Shanks. # (Thanks to Alexander Belopolsky for pointers to the decrees.) # From Stepan Golosunov (2016-03-07): # 11. Regions-violators, 1981-1982. # Wikipedia refers to # http://maps.monetonos.ru/maps/raznoe/Old_Maps/Old_Maps/Articles/022/3_1981.html # http://besp.narod.ru/nauka_1981_3.htm # # The second link provides two articles scanned from the Nauka i Zhizn # magazine No. 3, 1981 and a scan of the short article attributed to # the Trud newspaper from February 1982. The first link provides the # same Nauka i Zhizn articles converted to the text form (but misses # time belt changes map). # # The second Nauka i Zhizn article says that in addition to # introduction of summer time on 1981-04-01 there are some time belt # border changes on 1981-10-01, mostly affecting Nenets Autonomous # Okrug, Krasnoyarsk Krai, Yakutia, Magadan Oblast and Chukotka # according to the provided map (colored one). In addition to that # "time violators" (regions which were not using rules of the time # belts in which they were located) would not be moving off the DST on # 1981-10-01 to restore the decree time usage. (Komi ASSR was # supposed to repeat that move in October 1982 to account for the 2 # hour difference.) Map depicting "time violators" before 1981-10-01 # is also provided. # # The article from Trud says that 1981-10-01 changes caused problems # and some territories would be moved to pre-1981-10-01 time by not # moving to summer time on 1982-04-01. Namely: Dagestan, # Kabardino-Balkar, Kalmyk, Komi, Mari, Mordovian, North Ossetian, # Tatar, Chechen-Ingush and Chuvash ASSR, Krasnodar and Stavropol # krais, Arkhangelsk, Vladimir, Vologda, Voronezh, Gorky, Ivanovo, # Kostroma, Lipetsk, Penza, Rostov, Ryazan, Tambov, Tyumen and # Yaroslavl oblasts, Nenets and Evenk autonomous okrugs, Khatangsky # district of Taymyr Autonomous Okrug. As a result Evenk Autonomous # Okrug and Khatangsky district of Taymyr Autonomous Okrug would end # up on Moscow+4, Tyumen Oblast on Moscow+2 and the rest on Moscow # time. # # http://astrozet.net/files/Zones/DOC/RU/1980-925.txt # attributes the 1982 changes to the Act of the Council of Ministers # of the USSR No. 126 from 18.02.1982. 1980-925.txt also adds # Udmurtia to the list of affected territories and lists Khatangsky # district separately from Taymyr Autonomous Okrug. Probably erroneously. # # The affected territories are currently listed under Europe/Moscow, # Asia/Yekaterinburg and Asia/Krasnoyarsk. # # 12. Udmurtia # The fact that Udmurtia is depicted as a violator in the Nauka i # Zhizn article hints at Izhevsk being on different time from # Kuybyshev before 1981-10-01. Udmurtia is not mentioned in the 1989 act. # http://astrozet.net/files/Zones/DOC/RU/1980-925.txt # implies Udmurtia was on Moscow time after 1982-04-01. # Wikipedia implies Udmurtia being on Moscow+1 until 1991. # # ... # # All Russian zones are supposed to have by default a -1 change at # 1991-03-31 2:00 (cancellation of the decree time in the USSR) and a +1 # change at 1992-01-19 2:00 (restoration of the decree time in Russia). # # There were some exceptions, though. # Wikipedia says newspapers listed Astrakhan, Saratov, Kirov, Volgograd, # Izhevsk, Grozny, Kazan and Samara as such exceptions for the 1992 # change. (Different newspapers providing different lists. And some # lists found in the internet are quite wild.) # # And apparently some exceptions were reverted in the last moment. # http://www.kaliningradka.ru/site_pc/cherez/index.php?ELEMENT_ID=40091 # says that Kaliningrad decided not to be an exception 2 days before the # 1991-03-31 switch and one person at # https://izhevsk.ru/forum_light_message/50/682597-m8369040.html # says he remembers that Samara opted out of the 1992-01-19 exception # 2 days before the switch. # # From Alois Treindl (2022-02-15): # the Russian wikipedia page # https://ru.wikipedia.org/wiki/Московское_время#Перемещение_границы_применения_московского_времени_на_восток # contains the sentence (in Google translation) "In the autumn of # 1981, Arkhangelsk, Vologda, Yaroslavl, Ivanovo, Vladimir, Ryazan, # Lipetsk, Voronezh, Rostov-on-Don, Krasnodar and regions to the east # of those named (about 30 in total) parted ways with Moscow time. # However, the convenience of common time with Moscow turned out to be # decisive - in 1982, these regions again switched to Moscow time." # Shanks International atlas has similar information, and also the # Russian book Zaitsev A., Kutalev D. A new astrologer's reference # book. Coordinates of cities and time corrections, - The World of # Urania, 2012 (Russian: Зайцев А., Куталёв Д., Новый справочник # астролога. Координаты городов и временные поправки). # To me it seems that an extra zone is needed, which starts with LMT # util 1919, later follows Moscow since 1930, but deviates from it # between 1 October 1981 until 1 April 1982. # # # From Paul Eggert (2022-02-15): # Given the above, we appear to be missing some Zone entries for the # chaotic early 1980s in Russia. It's not clear what these entries # should be. For now, sweep this under the rug and just document the # time in Moscow. # From Vladimir Karpinsky (2014-07-08): # LMT in Moscow (before Jul 3, 1916) is 2:30:17, that was defined by Moscow # Observatory (coordinates: 55° 45' 29.70", 37° 34' 05.30").... # LMT in Moscow since Jul 3, 1916 is 2:31:01 as a result of new standard. # (The info is from the book by Byalokoz ... p. 18.) # The time in St. Petersburg as capital of Russia was defined by # Pulkov observatory, near St. Petersburg. In 1916 LMT Moscow # was synchronized with LMT St. Petersburg (+30 minutes), (Pulkov observatory # coordinates: 59° 46' 18.70", 30° 19' 40.70") so 30° 19' 40.70" > # 2h01m18.7s = 2:01:19. LMT Moscow = LMT St.Petersburg + 30m 2:01:19 + 0:30 = # 2:31:19 ... # # From Paul Eggert (2014-07-08): # Milne does not list Moscow, but suggests that its time might be listed in # Résumés mensuels et annuels des observations météorologiques (1895). # Presumably this is OCLC 85825704, a journal published with parallel text in # Russian and French. This source has not been located; go with Karpinsky. Zone Europe/Moscow 2:30:17 - LMT 1880 2:30:17 - MMT 1916 Jul 3 # Moscow Mean Time 2:31:19 Russia %s 1919 Jul 1 0:00u 3:00 Russia %s 1921 Oct 3:00 Russia MSK/MSD 1922 Oct 2:00 - EET 1930 Jun 21 3:00 Russia MSK/MSD 1991 Mar 31 2:00s 2:00 Russia EE%sT 1992 Jan 19 2:00s 3:00 Russia MSK/MSD 2011 Mar 27 2:00s 4:00 - MSK 2014 Oct 26 2:00s 3:00 - MSK # From Paul Eggert (2016-12-06): # Europe/Simferopol covers Crimea. Zone Europe/Simferopol 2:16:24 - LMT 1880 2:16 - SMT 1924 May 2 # Simferopol Mean T 2:00 - EET 1930 Jun 21 3:00 - MSK 1941 Nov 1:00 C-Eur CE%sT 1944 Apr 13 3:00 Russia MSK/MSD 1990 3:00 - MSK 1990 Jul 1 2:00 2:00 - EET 1992 Mar 20 # Central Crimea used Moscow time 1994/1997. # # From Paul Eggert (2022-07-21): # The _Economist_ (1994-05-28, p 45) reported that central Crimea switched # from Kyiv to Moscow time sometime after the January 1994 elections. # Shanks (1999) says "date of change uncertain", but implies that it happened # sometime between the 1994 DST switches. Shanks & Pottenger simply say # 1994-09-25 03:00, but that can't be right. For now, guess it # changed in May. This change evidently didn't last long; see below. 2:00 C-Eur EE%sT 1994 May # From IATA SSIM (1994/1997), which also said that Kerch is still like Kyiv. 3:00 C-Eur MSK/MSD 1996 Mar 31 0:00s 3:00 1:00 MSD 1996 Oct 27 3:00s # IATA SSIM (1997-09) said Crimea switched to EET/EEST. # Assume it happened in March by not changing the clocks. 3:00 - MSK 1997 Mar lastSun 1:00u # From Alexander Krivenyshev (2014-03-17): # time change at 2:00 (2am) on March 30, 2014 # https://vz.ru/news/2014/3/17/677464.html # From Tim Parenti (2022-07-01), per Paul Eggert (2014-03-30): # The clocks at the railway station in Simferopol were put forward from 22:00 # to 24:00 the previous day in a "symbolic ceremony"; however, per # contemporaneous news reports, "ordinary Crimeans [made] the daylight savings # time switch at 2am" on Sunday. # https://www.business-standard.com/article/pti-stories/crimea-to-set-clocks-to-russia-time-114033000014_1.html # https://www.reuters.com/article/us-ukraine-crisis-crimea-time/crimea-switches-to-moscow-time-amid-incorporation-frenzy-idUKBREA2S0LT20140329 # https://www.bbc.com/news/av/world-europe-26806583 2:00 EU EE%sT 2014 Mar 30 2:00 4:00 - MSK 2014 Oct 26 2:00s 3:00 - MSK # From Paul Eggert (2016-03-18): # Europe/Astrakhan covers: # 30 RU-AST Astrakhan Oblast # # The 1989 transition is from USSR act No. 227 (1989-03-14). # From Alexander Krivenyshev (2016-01-12): # On February 10, 2016 Astrakhan Oblast got approval by the Federation # Council to change its time zone to UTC+4 (from current UTC+3 Moscow time).... # This Federal Law shall enter into force on 27 March 2016 at 02:00. # From Matt Johnson (2016-03-09): # http://publication.pravo.gov.ru/Document/View/0001201602150056 Zone Europe/Astrakhan 3:12:12 - LMT 1924 May 3:00 - %z 1930 Jun 21 4:00 Russia %z 1989 Mar 26 2:00s 3:00 Russia %z 1991 Mar 31 2:00s 4:00 - %z 1992 Mar 29 2:00s 3:00 Russia %z 2011 Mar 27 2:00s 4:00 - %z 2014 Oct 26 2:00s 3:00 - %z 2016 Mar 27 2:00s 4:00 - %z # From Paul Eggert (2016-11-11): # Europe/Volgograd covers: # 34 RU-VGG Volgograd Oblast # The 1988 transition is from USSR act No. 5 (1988-01-04). # From Alexander Fetisov (2018-09-20): # Volgograd region in southern Russia (Europe/Volgograd) change # timezone from UTC+3 to UTC+4 from 28oct2018. # http://sozd.parliament.gov.ru/bill/452878-7 # # From Stepan Golosunov (2018-10-11): # The law has been published today on # http://publication.pravo.gov.ru/Document/View/0001201810110037 # From Alexander Krivenyshev (2020-11-27): # The State Duma approved (Nov 24, 2020) the transition of the Volgograd # region to the Moscow time zone.... # https://sozd.duma.gov.ru/bill/1012130-7 # # From Stepan Golosunov (2020-12-05): # Currently proposed text for the second reading (expected on December 8) ... # changes the date to December 27. https://v1.ru/text/gorod/2020/12/04/69601031/ # # From Stepan Golosunov (2020-12-22): # The law was published today on # http://publication.pravo.gov.ru/Document/View/0001202012220002 Zone Europe/Volgograd 2:57:40 - LMT 1920 Jan 3 3:00 - %z 1930 Jun 21 4:00 - %z 1961 Nov 11 4:00 Russia %z 1988 Mar 27 2:00s 3:00 Russia MSK/MSD 1991 Mar 31 2:00s 4:00 - %z 1992 Mar 29 2:00s 3:00 Russia MSK/MSD 2011 Mar 27 2:00s 4:00 - MSK 2014 Oct 26 2:00s 3:00 - MSK 2018 Oct 28 2:00s 4:00 - %z 2020 Dec 27 2:00s 3:00 - MSK # From Paul Eggert (2016-11-11): # Europe/Saratov covers: # 64 RU-SAR Saratov Oblast # From Yuri Konotopov (2016-11-11): # Dec 4, 2016 02:00 UTC+3.... Saratov Region's local time will be ... UTC+4. # From Stepan Golosunov (2016-11-11): # ... Byalokoz listed Saratov on 03:04:18. # From Stepan Golosunov (2016-11-22): # http://publication.pravo.gov.ru/Document/View/0001201611220031 Zone Europe/Saratov 3:04:18 - LMT 1919 Jul 1 0:00u 3:00 - %z 1930 Jun 21 4:00 Russia %z 1988 Mar 27 2:00s 3:00 Russia %z 1991 Mar 31 2:00s 4:00 - %z 1992 Mar 29 2:00s 3:00 Russia %z 2011 Mar 27 2:00s 4:00 - %z 2014 Oct 26 2:00s 3:00 - %z 2016 Dec 4 2:00s 4:00 - %z # From Paul Eggert (2016-03-18): # Europe/Kirov covers: # 43 RU-KIR Kirov Oblast # The 1989 transition is from USSR act No. 227 (1989-03-14). # Zone Europe/Kirov 3:18:48 - LMT 1919 Jul 1 0:00u 3:00 - %z 1930 Jun 21 4:00 Russia %z 1989 Mar 26 2:00s 3:00 Russia MSK/MSD 1991 Mar 31 2:00s 4:00 - %z 1992 Mar 29 2:00s 3:00 Russia MSK/MSD 2011 Mar 27 2:00s 4:00 - MSK 2014 Oct 26 2:00s 3:00 - MSK # From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2001-08-25): # Europe/Samara covers... # 18 RU-UD Udmurt Republic # 63 RU-SAM Samara Oblast # From Paul Eggert (2016-03-18): # Byalokoz 1919 says Samara was 3:20:20. # The 1989 transition is from USSR act No. 227 (1989-03-14). Zone Europe/Samara 3:20:20 - LMT 1919 Jul 1 0:00u 3:00 - %z 1930 Jun 21 4:00 - %z 1935 Jan 27 4:00 Russia %z 1989 Mar 26 2:00s 3:00 Russia %z 1991 Mar 31 2:00s 2:00 Russia %z 1991 Sep 29 2:00s 3:00 - %z 1991 Oct 20 3:00 4:00 Russia %z 2010 Mar 28 2:00s 3:00 Russia %z 2011 Mar 27 2:00s 4:00 - %z # From Paul Eggert (2016-03-18): # Europe/Ulyanovsk covers: # 73 RU-ULY Ulyanovsk Oblast # The 1989 transition is from USSR act No. 227 (1989-03-14). # From Alexander Krivenyshev (2016-02-17): # Ulyanovsk ... on their way to change time zones by March 27, 2016 at 2am. # Ulyanovsk Oblast ... from MSK to MSK+1 (UTC+3 to UTC+4) ... # 920582-6 ... 02/17/2016 The State Duma passed the bill in the first reading. # From Matt Johnson (2016-03-09): # http://publication.pravo.gov.ru/Document/View/0001201603090051 Zone Europe/Ulyanovsk 3:13:36 - LMT 1919 Jul 1 0:00u 3:00 - %z 1930 Jun 21 4:00 Russia %z 1989 Mar 26 2:00s 3:00 Russia %z 1991 Mar 31 2:00s 2:00 Russia %z 1992 Jan 19 2:00s 3:00 Russia %z 2011 Mar 27 2:00s 4:00 - %z 2014 Oct 26 2:00s 3:00 - %z 2016 Mar 27 2:00s 4:00 - %z # From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2001-08-25): # Asia/Yekaterinburg covers... # 02 RU-BA Bashkortostan, Republic of # 90 RU-PER Perm Krai # 45 RU-KGN Kurgan Oblast # 56 RU-ORE Orenburg Oblast # 66 RU-SVE Sverdlovsk Oblast # 72 RU-TYU Tyumen Oblast # 74 RU-CHE Chelyabinsk Oblast # 86 RU-KHM Khanty-Mansi Autonomous Okrug - Yugra # 89 RU-YAN Yamalo-Nenets Autonomous Okrug # # Note: Effective 2005-12-01, (59) Perm Oblast and (81) Komi-Permyak # Autonomous Okrug merged to form (90, RU-PER) Perm Krai. # Milne says Yekaterinburg was 4:02:32.9. # Byalokoz 1919 says its provincial time was based on Perm, at 3:45:05. # Assume it switched on 1916-07-03, the time of the new standard. # The 1919 and 1930 transitions are from Shanks. #STDOFF 4:02:32.9 Zone Asia/Yekaterinburg 4:02:33 - LMT 1916 Jul 3 3:45:05 - PMT 1919 Jul 15 4:00 4:00 - %z 1930 Jun 21 5:00 Russia %z 1991 Mar 31 2:00s 4:00 Russia %z 1992 Jan 19 2:00s 5:00 Russia %z 2011 Mar 27 2:00s 6:00 - %z 2014 Oct 26 2:00s 5:00 - %z # From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2001-08-25): # Asia/Omsk covers... # 55 RU-OMS Omsk Oblast # Byalokoz 1919 says Omsk was 4:53:30. Zone Asia/Omsk 4:53:30 - LMT 1919 Nov 14 5:00 - %z 1930 Jun 21 6:00 Russia %z 1991 Mar 31 2:00s 5:00 Russia %z 1992 Jan 19 2:00s 6:00 Russia %z 2011 Mar 27 2:00s 7:00 - %z 2014 Oct 26 2:00s 6:00 - %z # From Paul Eggert (2016-02-22): # Asia/Barnaul covers: # 04 RU-AL Altai Republic # 22 RU-ALT Altai Krai # Data before 1991 are from Shanks & Pottenger. # From Stepan Golosunov (2016-03-07): # Letter of Bank of Russia from 1995-05-25 # http://www.bestpravo.ru/rossijskoje/lj-akty/y3a.htm # suggests that Altai Republic transitioned to Moscow+3 on # 1995-05-28. # # https://regnum.ru/news/society/1957270.html # has some historical data for Altai Krai: # before 1957: west part on UT+6, east on UT+7 # after 1957: UT+7 # since 1995: UT+6 # http://barnaul.rusplt.ru/index/pochemu_altajskij_kraj_okazalsja_v_neprivychnom_chasovom_pojase-17648.html # confirms that and provides more details including 1995-05-28 transition date. # From Alexander Krivenyshev (2016-02-17): # Altai Krai and Altai Republic on their way to change time zones # by March 27, 2016 at 2am.... # Altai Republic / Gorno-Altaysk MSK+3 to MSK+4 (UTC+6 to UTC+7) ... # Altai Krai / Barnaul MSK+3 to MSK+4 (UTC+6 to UTC+7) # From Matt Johnson (2016-03-09): # http://publication.pravo.gov.ru/Document/View/0001201603090043 # http://publication.pravo.gov.ru/Document/View/0001201603090038 Zone Asia/Barnaul 5:35:00 - LMT 1919 Dec 10 6:00 - %z 1930 Jun 21 7:00 Russia %z 1991 Mar 31 2:00s 6:00 Russia %z 1992 Jan 19 2:00s 7:00 Russia %z 1995 May 28 6:00 Russia %z 2011 Mar 27 2:00s 7:00 - %z 2014 Oct 26 2:00s 6:00 - %z 2016 Mar 27 2:00s 7:00 - %z # From Paul Eggert (2016-03-18): # Asia/Novosibirsk covers: # 54 RU-NVS Novosibirsk Oblast # From Stepan Golosunov (2016-05-30): # http://asozd2.duma.gov.ru/main.nsf/(Spravka)?OpenAgent&RN=1085784-6 # moves Novosibirsk oblast from UTC+6 to UTC+7. # From Stepan Golosunov (2016-07-04): # The law was signed yesterday and published today on # http://publication.pravo.gov.ru/Document/View/0001201607040064 Zone Asia/Novosibirsk 5:31:40 - LMT 1919 Dec 14 6:00 6:00 - %z 1930 Jun 21 7:00 Russia %z 1991 Mar 31 2:00s 6:00 Russia %z 1992 Jan 19 2:00s 7:00 Russia %z 1993 May 23 # say Shanks & P. 6:00 Russia %z 2011 Mar 27 2:00s 7:00 - %z 2014 Oct 26 2:00s 6:00 - %z 2016 Jul 24 2:00s 7:00 - %z # From Paul Eggert (2016-03-18): # Asia/Tomsk covers: # 70 RU-TOM Tomsk Oblast # From Stepan Golosunov (2016-03-24): # Byalokoz listed Tomsk at 5:39:51. # From Stanislaw A. Kuzikowski (1994-06-29): # Tomsk is still 4 hours ahead of Moscow. # From Stepan Golosunov (2016-03-19): # http://pravo.gov.ru/proxy/ips/?docbody=&nd=102075743 # (fifth time belt being UTC+5+1(decree time) # / UTC+5+1(decree time)+1(summer time)) ... # Note that time belts (numbered from 2 (Moscow) to 12 according to their # GMT/UTC offset and having too many exceptions like regions formally # belonging to one belt but using time from another) were replaced # with time zones in 2011 with different numbering (there was a # 2-hour gap between second and third zones in 2011-2014). # From Stepan Golosunov (2016-04-12): # http://asozd2.duma.gov.ru/main.nsf/(SpravkaNew)?OpenAgent&RN=1006865-6 # This bill was approved in the first reading today. It moves Tomsk oblast # from UTC+6 to UTC+7 and is supposed to come into effect on 2016-05-29 at # 2:00. The bill needs to be approved in the second and the third readings by # the State Duma, approved by the Federation Council, signed by the President # and published to become a law. Minor changes in the text are to be expected # before the second reading (references need to be updated to account for the # recent changes). # # Judging by the ultra-short one-day amendments period, recent similar laws, # the State Duma schedule and the Federation Council schedule # http://www.duma.gov.ru/legislative/planning/day-shedule/por_vesna_2016/ # http://council.gov.ru/activity/meetings/schedule/63303 # I speculate that the final text of the bill will be proposed tomorrow, the # bill will be approved in the second and the third readings on Friday, # approved by the Federation Council on 2016-04-20, signed by the President and # published as a law around 2016-04-26. # From Matt Johnson (2016-04-26): # http://publication.pravo.gov.ru/Document/View/0001201604260048 Zone Asia/Tomsk 5:39:51 - LMT 1919 Dec 22 6:00 - %z 1930 Jun 21 7:00 Russia %z 1991 Mar 31 2:00s 6:00 Russia %z 1992 Jan 19 2:00s 7:00 Russia %z 2002 May 1 3:00 6:00 Russia %z 2011 Mar 27 2:00s 7:00 - %z 2014 Oct 26 2:00s 6:00 - %z 2016 May 29 2:00s 7:00 - %z # From Tim Parenti (2014-07-03): # Asia/Novokuznetsk covers... # 42 RU-KEM Kemerovo Oblast # From Alexander Krivenyshev (2009-10-13): # Kemerovo oblast' (Kemerovo region) in Russia will change current time zone on # March 28, 2010: # from current Russia Zone 6 - Krasnoyarsk Time Zone (KRA) UTC +0700 # to Russia Zone 5 - Novosibirsk Time Zone (NOV) UTC +0600 # # This is according to Government of Russia decree No. 740, on September # 14, 2009 "Application in the territory of the Kemerovo region the Fifth # time zone." ("Russia Zone 5" or old "USSR Zone 5" is GMT +0600) # # Russian Government web site (Russian language) # http://www.government.ru/content/governmentactivity/rfgovernmentdecisions/archive/2009/09/14/991633.htm # or Russian-English translation by WorldTimeZone.com with reference # map to local region and new Russia Time Zone map after March 28, 2010 # http://www.worldtimezone.com/dst_news/dst_news_russia03.html # # Thus, when Russia will switch to DST on the night of March 28, 2010 # Kemerovo region (Kemerovo oblast') will not change the clock. # From Tim Parenti (2014-07-02), per Alexander Krivenyshev (2014-07-02): # The Kemerovo region will remain at UTC+7 through the 2014-10-26 change, thus # realigning itself with KRAT. Zone Asia/Novokuznetsk 5:48:48 - LMT 1924 May 1 6:00 - %z 1930 Jun 21 7:00 Russia %z 1991 Mar 31 2:00s 6:00 Russia %z 1992 Jan 19 2:00s 7:00 Russia %z 2010 Mar 28 2:00s 6:00 Russia %z 2011 Mar 27 2:00s 7:00 - %z # From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2001-08-25): # Asia/Krasnoyarsk covers... # 17 RU-TY Tuva Republic # 19 RU-KK Khakassia, Republic of # 24 RU-KYA Krasnoyarsk Krai # # Note: Effective 2007-01-01, (88) Evenk Autonomous Okrug and (84) Taymyr # Autonomous Okrug were merged into (24, RU-KYA) Krasnoyarsk Krai. # Byalokoz 1919 says Krasnoyarsk was 6:11:26. Zone Asia/Krasnoyarsk 6:11:26 - LMT 1920 Jan 6 6:00 - %z 1930 Jun 21 7:00 Russia %z 1991 Mar 31 2:00s 6:00 Russia %z 1992 Jan 19 2:00s 7:00 Russia %z 2011 Mar 27 2:00s 8:00 - %z 2014 Oct 26 2:00s 7:00 - %z # From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2001-08-25): # Asia/Irkutsk covers... # 03 RU-BU Buryatia, Republic of # 38 RU-IRK Irkutsk Oblast # # Note: Effective 2008-01-01, (85) Ust-Orda Buryat Autonomous Okrug was # merged into (38, RU-IRK) Irkutsk Oblast. # Milne 1899 says Irkutsk was 6:57:15. # Byalokoz 1919 says Irkutsk was 6:57:05. # Go with Byalokoz. Zone Asia/Irkutsk 6:57:05 - LMT 1880 6:57:05 - IMT 1920 Jan 25 # Irkutsk Mean Time 7:00 - %z 1930 Jun 21 8:00 Russia %z 1991 Mar 31 2:00s 7:00 Russia %z 1992 Jan 19 2:00s 8:00 Russia %z 2011 Mar 27 2:00s 9:00 - %z 2014 Oct 26 2:00s 8:00 - %z # From Tim Parenti (2014-07-06): # Asia/Chita covers... # 92 RU-ZAB Zabaykalsky Krai # # Note: Effective 2008-03-01, (75) Chita Oblast and (80) Agin-Buryat # Autonomous Okrug merged to form (92, RU-ZAB) Zabaykalsky Krai. # From Alexander Krivenyshev (2016-01-02): # [The] time zone in the Trans-Baikal Territory (Zabaykalsky Krai) - # Asia/Chita [is changing] from UTC+8 to UTC+9. Effective date will # be March 27, 2016 at 2:00am.... # http://publication.pravo.gov.ru/Document/View/0001201512300107 Zone Asia/Chita 7:33:52 - LMT 1919 Dec 15 8:00 - %z 1930 Jun 21 9:00 Russia %z 1991 Mar 31 2:00s 8:00 Russia %z 1992 Jan 19 2:00s 9:00 Russia %z 2011 Mar 27 2:00s 10:00 - %z 2014 Oct 26 2:00s 8:00 - %z 2016 Mar 27 2:00 9:00 - %z # From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2009-11-29): # Asia/Yakutsk covers... # 28 RU-AMU Amur Oblast # # ...and parts of (14, RU-SA) Sakha (Yakutia) Republic: # 14-02 **** Aldansky District # 14-04 **** Amginsky District # 14-05 **** Anabarsky District # 14-06 **** Bulunsky District # 14-07 **** Verkhnevilyuysky District # 14-10 **** Vilyuysky District # 14-11 **** Gorny District # 14-12 **** Zhigansky District # 14-13 **** Kobyaysky District # 14-14 **** Lensky District # 14-15 **** Megino-Kangalassky District # 14-16 **** Mirninsky District # 14-18 **** Namsky District # 14-19 **** Neryungrinsky District # 14-21 **** Nyurbinsky District # 14-23 **** Olenyoksky District # 14-24 **** Olyokminsky District # 14-26 **** Suntarsky District # 14-27 **** Tattinsky District # 14-29 **** Ust-Aldansky District # 14-32 **** Khangalassky District # 14-33 **** Churapchinsky District # 14-34 **** Eveno-Bytantaysky National District # From Tim Parenti (2014-07-03): # Our commentary seems to have lost mention of (14-19) Neryungrinsky District. # Since the surrounding districts of Sakha are all YAKT, assume this is, too. # Also assume its history has been the same as the rest of Asia/Yakutsk. # Byalokoz 1919 says Yakutsk was 8:38:58. Zone Asia/Yakutsk 8:38:58 - LMT 1919 Dec 15 8:00 - %z 1930 Jun 21 9:00 Russia %z 1991 Mar 31 2:00s 8:00 Russia %z 1992 Jan 19 2:00s 9:00 Russia %z 2011 Mar 27 2:00s 10:00 - %z 2014 Oct 26 2:00s 9:00 - %z # From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2009-11-29): # Asia/Vladivostok covers... # 25 RU-PRI Primorsky Krai # 27 RU-KHA Khabarovsk Krai # 79 RU-YEV Jewish Autonomous Oblast # # ...and parts of (14, RU-SA) Sakha (Yakutia) Republic: # 14-09 **** Verkhoyansky District # 14-31 **** Ust-Yansky District # Milne 1899 says Vladivostok was 8:47:33.5. # Byalokoz 1919 says Vladivostok was 8:47:31. # Go with Byalokoz. Zone Asia/Vladivostok 8:47:31 - LMT 1922 Nov 15 9:00 - %z 1930 Jun 21 10:00 Russia %z 1991 Mar 31 2:00s 9:00 Russia %z 1992 Jan 19 2:00s 10:00 Russia %z 2011 Mar 27 2:00s 11:00 - %z 2014 Oct 26 2:00s 10:00 - %z # From Tim Parenti (2014-07-03): # Asia/Khandyga covers parts of (14, RU-SA) Sakha (Yakutia) Republic: # 14-28 **** Tomponsky District # 14-30 **** Ust-Maysky District # From Arthur David Olson (2022-03-21): # Tomponsky and Ust-Maysky switched from Vladivostok time to Yakutsk time # in 2011. # From Paul Eggert (2012-11-25): # Shanks and Pottenger (2003) has Khandyga on Yakutsk time. # Make a wild guess that it switched to Vladivostok time in 2004. # This transition is no doubt wrong, but we have no better info. Zone Asia/Khandyga 9:02:13 - LMT 1919 Dec 15 8:00 - %z 1930 Jun 21 9:00 Russia %z 1991 Mar 31 2:00s 8:00 Russia %z 1992 Jan 19 2:00s 9:00 Russia %z 2004 10:00 Russia %z 2011 Mar 27 2:00s 11:00 - %z 2011 Sep 13 0:00s # Decree 725? 10:00 - %z 2014 Oct 26 2:00s 9:00 - %z # From Tim Parenti (2014-07-03): # Asia/Sakhalin covers... # 65 RU-SAK Sakhalin Oblast # ...with the exception of: # 65-11 **** Severo-Kurilsky District (North Kuril Islands) # From Matt Johnson (2016-02-22): # Asia/Sakhalin is moving (in entirety) from UTC+10 to UTC+11 ... # (2016-03-09): # http://publication.pravo.gov.ru/Document/View/0001201603090044 # The Zone name should be Asia/Yuzhno-Sakhalinsk, but that's too long. Zone Asia/Sakhalin 9:30:48 - LMT 1905 Aug 23 9:00 - %z 1945 Aug 25 11:00 Russia %z 1991 Mar 31 2:00s # Sakhalin T 10:00 Russia %z 1992 Jan 19 2:00s 11:00 Russia %z 1997 Mar lastSun 2:00s 10:00 Russia %z 2011 Mar 27 2:00s 11:00 - %z 2014 Oct 26 2:00s 10:00 - %z 2016 Mar 27 2:00s 11:00 - %z # From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2009-11-29): # Asia/Magadan covers... # 49 RU-MAG Magadan Oblast # From Tim Parenti (2014-07-06), per Alexander Krivenyshev (2014-07-02): # Magadan Oblast is moving from UTC+12 to UTC+10 on 2014-10-26; however, # several districts of Sakha Republic as well as Severo-Kurilsky District of # the Sakhalin Oblast (also known as the North Kuril Islands), represented # until now by Asia/Magadan, will instead move to UTC+11. These regions will # need their own zone. # From Alexander Krivenyshev (2016-03-27): # ... draft bill 948300-6 to change its time zone from UTC+10 to UTC+11 ... # will take ... effect ... on April 24, 2016 at 2 o'clock # # From Matt Johnson (2016-04-05): # ... signed by the President today ... # http://publication.pravo.gov.ru/Document/View/0001201604050038 Zone Asia/Magadan 10:03:12 - LMT 1924 May 2 10:00 - %z 1930 Jun 21 # Magadan Time 11:00 Russia %z 1991 Mar 31 2:00s 10:00 Russia %z 1992 Jan 19 2:00s 11:00 Russia %z 2011 Mar 27 2:00s 12:00 - %z 2014 Oct 26 2:00s 10:00 - %z 2016 Apr 24 2:00s 11:00 - %z # From Tim Parenti (2014-07-06): # Asia/Srednekolymsk covers parts of (14, RU-SA) Sakha (Yakutia) Republic: # 14-01 **** Abyysky District # 14-03 **** Allaikhovsky District # 14-08 **** Verkhnekolymsky District # 14-17 **** Momsky District # 14-20 **** Nizhnekolymsky District # 14-25 **** Srednekolymsky District # # ...and parts of (65, RU-SAK) Sakhalin Oblast: # 65-11 **** Severo-Kurilsky District (North Kuril Islands) # From Tim Parenti (2014-07-02): # Oymyakonsky District of Sakha Republic (represented by Ust-Nera), along with # most of Sakhalin Oblast (represented by Sakhalin) will be moving to UTC+10 on # 2014-10-26 to stay aligned with VLAT/SAKT; however, Severo-Kurilsky District # of the Sakhalin Oblast (also known as the North Kuril Islands, represented by # Severo-Kurilsk) will remain on UTC+11. # From Tim Parenti (2014-07-06): # Assume North Kuril Islands have history like Magadan before 2011-03-27. # There is a decent chance this is wrong, in which case a new zone # Asia/Severo-Kurilsk would become necessary. # # Srednekolymsk and Zyryanka are the most populous places amongst these # districts, but have very similar populations. In fact, Wikipedia currently # lists them both as having 3528 people, exactly 1668 males and 1860 females # each! (Yikes!) # https://en.wikipedia.org/w/?title=Srednekolymsky_District&oldid=603435276 # https://en.wikipedia.org/w/?title=Verkhnekolymsky_District&oldid=594378493 # Assume this is a mistake, albeit an amusing one. # # Looking at censuses, the populations of the two municipalities seem to have # fluctuated recently. Zyryanka was more populous than Srednekolymsk in the # 1989 and 2002 censuses, but Srednekolymsk was more populous in the most # recent (2010) census, 3525 to 3170. (See pages 195 and 197 of # http://www.gks.ru/free_doc/new_site/perepis2010/croc/Documents/Vol1/pub-01-05.pdf # in Russian.) In addition, Srednekolymsk appears to be a much older # settlement and the population of Zyryanka seems to be declining. # Go with Srednekolymsk. Zone Asia/Srednekolymsk 10:14:52 - LMT 1924 May 2 10:00 - %z 1930 Jun 21 11:00 Russia %z 1991 Mar 31 2:00s 10:00 Russia %z 1992 Jan 19 2:00s 11:00 Russia %z 2011 Mar 27 2:00s 12:00 - %z 2014 Oct 26 2:00s 11:00 - %z # From Tim Parenti (2014-07-03): # Asia/Ust-Nera covers parts of (14, RU-SA) Sakha (Yakutia) Republic: # 14-22 **** Oymyakonsky District # From Arthur David Olson (2022-03-21): # Oymyakonsky and the Kuril Islands switched from # Magadan time to Vladivostok time in 2011. # # From Tim Parenti (2014-07-06), per Alexander Krivenyshev (2014-07-02): # It's unlikely that any of the Kuril Islands were involved in such a switch, # as the South and Middle Kurils have been on UTC+11 (SAKT) with the rest of # Sakhalin Oblast since at least 2011-09, and the North Kurils have been on # UTC+12 since at least then, too. Zone Asia/Ust-Nera 9:32:54 - LMT 1919 Dec 15 8:00 - %z 1930 Jun 21 9:00 Russia %z 1981 Apr 1 11:00 Russia %z 1991 Mar 31 2:00s 10:00 Russia %z 1992 Jan 19 2:00s 11:00 Russia %z 2011 Mar 27 2:00s 12:00 - %z 2011 Sep 13 0:00s # Decree 725? 11:00 - %z 2014 Oct 26 2:00s 10:00 - %z # From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2001-08-25): # Asia/Kamchatka covers... # 91 RU-KAM Kamchatka Krai # # Note: Effective 2007-07-01, (41) Kamchatka Oblast and (82) Koryak # Autonomous Okrug merged to form (91, RU-KAM) Kamchatka Krai. # The Zone name should be Asia/Petropavlovsk-Kamchatski or perhaps # Asia/Petropavlovsk-Kamchatsky, but these are too long. Zone Asia/Kamchatka 10:34:36 - LMT 1922 Nov 10 11:00 - %z 1930 Jun 21 12:00 Russia %z 1991 Mar 31 2:00s 11:00 Russia %z 1992 Jan 19 2:00s 12:00 Russia %z 2010 Mar 28 2:00s 11:00 Russia %z 2011 Mar 27 2:00s 12:00 - %z # From Tim Parenti (2014-07-03): # Asia/Anadyr covers... # 87 RU-CHU Chukotka Autonomous Okrug Zone Asia/Anadyr 11:49:56 - LMT 1924 May 2 12:00 - %z 1930 Jun 21 13:00 Russia %z 1982 Apr 1 0:00s 12:00 Russia %z 1991 Mar 31 2:00s 11:00 Russia %z 1992 Jan 19 2:00s 12:00 Russia %z 2010 Mar 28 2:00s 11:00 Russia %z 2011 Mar 27 2:00s 12:00 - %z # Bosnia & Herzegovina # Croatia # Kosovo # Montenegro # North Macedonia # Serbia # Slovenia # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Europe/Belgrade 1:22:00 - LMT 1884 1:00 - CET 1941 Apr 18 23:00 1:00 C-Eur CE%sT 1945 1:00 - CET 1945 May 8 2:00s 1:00 1:00 CEST 1945 Sep 16 2:00s # Metod Koželj reports that the legal date of # transition to EU rules was 1982-11-27, for all of Yugoslavia at the time. # Shanks & Pottenger don't give as much detail, so go with Koželj. 1:00 - CET 1982 Nov 27 1:00 EU CE%sT # Spain # # From Paul Eggert (2016-12-14): # # The source for Europe/Madrid before 2013 is: # Planesas P. La hora oficial en España y sus cambios. # Anuario del Observatorio Astronómico de Madrid (2013, in Spanish). # http://astronomia.ign.es/rknowsys-theme/images/webAstro/paginas/documentos/Anuario/lahoraoficialenespana.pdf # As this source says that historical time in the Canaries is obscure, # and it does not discuss Ceuta, stick with Shanks for now for that data. # # In the 1918 and 1919 fallback transitions in Spain, the clock for # the hour-longer day officially kept going after midnight, so that # the repeated instances of that day's 00:00 hour were 24 hours apart, # with a fallback transition from the second occurrence of 00:59... to # the next day's 00:00. Our data format cannot represent this # directly, and instead repeats the first hour of the next day, with a # fallback transition from the next day's 00:59... to 00:00. # From Michael Deckers (2016-12-15): # The Royal Decree of 1900-07-26 quoted by Planesas, online at # https://www.boe.es/datos/pdfs/BOE//1900/209/A00383-00384.pdf # says in its article 5 (my translation): # These dispositions will enter into force beginning with the # instant at which, according to the time indicated in article 1, # the 1st day of January of 1901 will begin. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Spain 1918 only - Apr 15 23:00 1:00 S Rule Spain 1918 1919 - Oct 6 24:00s 0 - Rule Spain 1919 only - Apr 6 23:00 1:00 S Rule Spain 1924 only - Apr 16 23:00 1:00 S Rule Spain 1924 only - Oct 4 24:00s 0 - Rule Spain 1926 only - Apr 17 23:00 1:00 S Rule Spain 1926 1929 - Oct Sat>=1 24:00s 0 - Rule Spain 1927 only - Apr 9 23:00 1:00 S Rule Spain 1928 only - Apr 15 0:00 1:00 S Rule Spain 1929 only - Apr 20 23:00 1:00 S # Republican Spain during the civil war; it controlled Madrid until 1939-03-28. Rule Spain 1937 only - Jun 16 23:00 1:00 S Rule Spain 1937 only - Oct 2 24:00s 0 - Rule Spain 1938 only - Apr 2 23:00 1:00 S Rule Spain 1938 only - Apr 30 23:00 2:00 M Rule Spain 1938 only - Oct 2 24:00 1:00 S # The following rules are for unified Spain again. # # Planesas does not say what happened in Madrid between its fall on # 1939-03-28 and the Nationalist spring-forward transition on # 1939-04-15. For lack of better info, assume Madrid's clocks did not # change during that period. # # The first rule is commented out, as it is redundant for Republican Spain. #Rule Spain 1939 only - Apr 15 23:00 1:00 S Rule Spain 1939 only - Oct 7 24:00s 0 - Rule Spain 1942 only - May 2 23:00 1:00 S Rule Spain 1942 only - Sep 1 1:00 0 - Rule Spain 1943 1946 - Apr Sat>=13 23:00 1:00 S Rule Spain 1943 1944 - Oct Sun>=1 1:00 0 - Rule Spain 1945 1946 - Sep lastSun 1:00 0 - Rule Spain 1949 only - Apr 30 23:00 1:00 S Rule Spain 1949 only - Oct 2 1:00 0 - Rule Spain 1974 1975 - Apr Sat>=12 23:00 1:00 S Rule Spain 1974 1975 - Oct Sun>=1 1:00 0 - Rule Spain 1976 only - Mar 27 23:00 1:00 S Rule Spain 1976 1977 - Sep lastSun 1:00 0 - Rule Spain 1977 only - Apr 2 23:00 1:00 S Rule Spain 1978 only - Apr 2 2:00s 1:00 S Rule Spain 1978 only - Oct 1 2:00s 0 - # Nationalist Spain during the civil war #Rule NatSpain 1937 only - May 22 23:00 1:00 S #Rule NatSpain 1937 1938 - Oct Sat>=1 24:00s 0 - #Rule NatSpain 1938 only - Mar 26 23:00 1:00 S # The following rules are copied from Morocco from 1967 through 1978, # except with "S" letters. Rule SpainAfrica 1967 only - Jun 3 12:00 1:00 S Rule SpainAfrica 1967 only - Oct 1 0:00 0 - Rule SpainAfrica 1974 only - Jun 24 0:00 1:00 S Rule SpainAfrica 1974 only - Sep 1 0:00 0 - Rule SpainAfrica 1976 1977 - May 1 0:00 1:00 S Rule SpainAfrica 1976 only - Aug 1 0:00 0 - Rule SpainAfrica 1977 only - Sep 28 0:00 0 - Rule SpainAfrica 1978 only - Jun 1 0:00 1:00 S Rule SpainAfrica 1978 only - Aug 4 0:00 0 - # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Europe/Madrid -0:14:44 - LMT 1901 Jan 1 0:00u 0:00 Spain WE%sT 1940 Mar 16 23:00 1:00 Spain CE%sT 1979 1:00 EU CE%sT Zone Africa/Ceuta -0:21:16 - LMT 1901 Jan 1 0:00u 0:00 - WET 1918 May 6 23:00 0:00 1:00 WEST 1918 Oct 7 23:00 0:00 - WET 1924 0:00 Spain WE%sT 1929 0:00 - WET 1967 # Help zishrink.awk. 0:00 SpainAfrica WE%sT 1984 Mar 16 1:00 - CET 1986 1:00 EU CE%sT Zone Atlantic/Canary -1:01:36 - LMT 1922 Mar # Las Palmas de Gran C. -1:00 - %z 1946 Sep 30 1:00 0:00 - WET 1980 Apr 6 0:00s 0:00 1:00 WEST 1980 Sep 28 1:00u 0:00 EU WE%sT # IATA SSIM (1996-09) says the Canaries switch at 2:00u, not 1:00u. # Ignore this for now, as the Canaries are part of the EU. # Germany (Busingen enclave) # Liechtenstein # Switzerland # # From Howse: # By the end of the 18th century clocks and watches became commonplace # and their performance improved enormously. Communities began to keep # mean time in preference to apparent time - Geneva from 1780 .... # Rule NAME FROM TO - IN ON AT SAVE LETTER/S # From Whitman (who writes "Midnight?"): # Rule Swiss 1940 only - Nov 2 0:00 1:00 S # Rule Swiss 1940 only - Dec 31 0:00 0 - # From Shanks & Pottenger: # Rule Swiss 1941 1942 - May Sun>=1 2:00 1:00 S # Rule Swiss 1941 1942 - Oct Sun>=1 0:00 0 - # From Alois Treindl (2008-12-17): # I have researched the DST usage in Switzerland during the 1940ies. # # As I wrote in an earlier message, I suspected the current tzdata values # to be wrong. This is now verified. # # I have found copies of the original ruling by the Swiss Federal # government, in 'Eidgenössische Gesetzessammlung 1941 and 1942' (Swiss # federal law collection)... # # DST began on Monday 5 May 1941, 1:00 am by shifting the clocks to 2:00 am # DST ended on Monday 6 Oct 1941, 2:00 am by shifting the clocks to 1:00 am. # # DST began on Monday, 4 May 1942 at 01:00 am # DST ended on Monday, 5 Oct 1942 at 02:00 am # # There was no DST in 1940, I have checked the law collection carefully. # It is also indicated by the fact that the 1942 entry in the law # collection points back to 1941 as a reference, but no reference to any # other years are made. # # Newspaper articles I have read in the archives on 6 May 1941 reported # about the introduction of DST (Sommerzeit in German) during the previous # night as an absolute novelty, because this was the first time that such # a thing had happened in Switzerland. # # I have also checked 1916, because one book source (Gabriel, Traité de # l'heure dans le monde) claims that Switzerland had DST in 1916. This is # false, no official document could be found. Probably Gabriel got misled # by references to Germany, which introduced DST in 1916 for the first time. # # The tzdata rules for Switzerland must be changed to: # Rule Swiss 1941 1942 - May Mon>=1 1:00 1:00 S # Rule Swiss 1941 1942 - Oct Mon>=1 2:00 0 - # # The 1940 rules must be deleted. # # One further detail for Switzerland, which is probably out of scope for # most users of tzdata: The [Europe/Zurich zone] ... # describes all of Switzerland correctly, with the exception of # the Canton de Genève (Geneva, Genf). Between 1848 and 1894 Geneva did not # follow Bern Mean Time but kept its own local mean time. # To represent this, an extra zone would be needed. # # From Alois Treindl (2013-09-11): # The Federal regulations say # https://www.admin.ch/opc/de/classified-compilation/20071096/index.html # ... the meridian for Bern mean time ... is 7° 26' 22.50". # Expressed in time, it is 0h29m45.5s. # From Pierre-Yves Berger (2013-09-11): # the "Circulaire du conseil fédéral" (December 11 1893) # http://www.amtsdruckschriften.bar.admin.ch/viewOrigDoc.do?id=10071353 # clearly states that the [1894-06-01] change should be done at midnight # but if no one is present after 11 at night, could be postponed until one # hour before the beginning of service. # From Paul Eggert (2024-05-24): # Express BMT as 0:29:45.500, approximately the same precision 7° 26' 22.50". # # We can find no reliable source for Shanks's assertion that all of Switzerland # except Geneva switched to Bern Mean Time at 00:00 on 1848-09-12. This book: # # Jakob Messerli. Gleichmässig, pünktlich, schnell. Zeiteinteilung und # Zeitgebrauch in der Schweiz im 19. Jahrhundert. Chronos, Zurich 1995, # ISBN 3-905311-68-2, OCLC 717570797. # # suggests that the transition was more gradual, and that the Swiss did not # agree about civil time during the transition. The timekeeping it gives the # most detail for is postal and telegraph time: here, federal legislation (the # "Bundesgesetz über die Erstellung von elektrischen Telegraphen") passed on # 1851-11-23, and an official implementation notice was published 1853-07-16 # (Bundesblatt 1853, Bd. II, S. 859). On p 72 Messerli writes that in # practice since July 1853 Bernese time was used in "all postal and telegraph # offices in Switzerland from Geneva to St. Gallen and Basel to Chiasso" # (Google translation). For now, model this transition as occurring on # 1853-07-16, though it probably occurred at some other date in Zurich, and # legal civil time probably changed at still some other transition date. # From Tobias Conradi (2011-09-12): # Büsingen , surrounded by the Swiss canton # Schaffhausen, did not start observing DST in 1980 as the rest of DE # (West Germany at that time) and DD (East Germany at that time) did. # DD merged into DE, the area is currently covered by code DE in ISO 3166-1, # which in turn is covered by the zone Europe/Berlin. # # Source for the time in Büsingen 1980: # http://www.srf.ch/player/video?id=c012c029-03b7-4c2b-9164-aa5902cd58d3 # # From Arthur David Olson (2012-03-03): # Büsingen and Zurich have shared clocks since 1970. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Swiss 1941 1942 - May Mon>=1 1:00 1:00 S Rule Swiss 1941 1942 - Oct Mon>=1 2:00 0 - # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Europe/Zurich 0:34:08 - LMT 1853 Jul 16 # See above comment. #STDOFF 0:29:45.500 0:29:46 - BMT 1894 Jun # Bern Mean Time 1:00 Swiss CE%sT 1981 1:00 EU CE%sT # Turkey # From Alois Treindl (2019-08-12): # http://www.astrolojidergisi.com/yazsaati.htm has researched the time zone # history of Turkey, based on newspaper archives and official documents. # From Paul Eggert (2019-08-28): # That source (Oya Vulaş, "Türkiye'de Yaz Saati Uygulamaları") # is used for 1940/1972, where it seems more reliable than our other # sources. # From Kıvanç Yazan (2019-08-12): # http://www.resmigazete.gov.tr/arsiv/14539.pdf#page=24 # 1973-06-03 01:00 -> 02:00, 1973-11-04 02:00 -> 01:00 # # http://www.resmigazete.gov.tr/arsiv/14829.pdf#page=1 # 1974-03-31 02:00 -> 03:00, 1974-11-03 02:00 -> 01:00 # # http://www.resmigazete.gov.tr/arsiv/15161.pdf#page=1 # 1975-03-22 02:00 -> 03:00, 1975-11-02 02:00 -> 01:00 # # http://www.resmigazete.gov.tr/arsiv/15535_1.pdf#page=1 # 1976-03-21 02:00 -> 03:00, 1976-10-31 02:00 -> 01:00 # # http://www.resmigazete.gov.tr/arsiv/15778.pdf#page=5 # 1977-04-03 02:00 -> 03:00, 1977-10-16 02:00 -> 01:00, # 1978-04-02 02:00 -> 03:00 (not applied, see below) # 1978-10-15 02:00 -> 01:00 (not applied, see below) # 1979-04-01 02:00 -> 03:00 (not applied, see below) # 1979-10-14 02:00 -> 01:00 (not applied, see below) # # http://www.resmigazete.gov.tr/arsiv/16245.pdf#page=17 # This cancels the previous decision, and repeats it only for 1978. # 1978-04-02 02:00 -> 03:00, 1978-10-15 02:00 -> 01:00 # (not applied due to standard TZ change below) # # http://www.resmigazete.gov.tr/arsiv/16331.pdf#page=3 # This decision changes the default longitude for Turkish time zone from 30 # degrees East to 45 degrees East. This means a standard TZ change, from +2 # to +3. This is published & applied on 1978-06-29. At that time, Turkey was # already on summer time (already on 45E). Hence, this new law just meant an # "continuous summer time". Note that this was reversed in a few years. # # http://www.resmigazete.gov.tr/arsiv/18119_1.pdf#page=1 # 1983-07-31 02:00 -> 03:00 (note that this jumps TZ to +4) # 1983-10-02 02:00 -> 01:00 (back to +3) # # http://www.resmigazete.gov.tr/arsiv/18561.pdf (page 1 and 34) # At this time, Turkey is still on +3 with no spring-forward on early # 1984. This decision is published on 10/31/1984. Page 1 declares # the decision of reverting the "default longitude change". So the # standard time should go back to +3 (30E). And page 34 explains when # that will happen: 1984-11-01 02:00 -> 01:00. You can think of this # as "end of continuous summer time, change of standard time zone". # # http://www.resmigazete.gov.tr/arsiv/18713.pdf#page=1 # 1985-04-20 01:00 -> 02:00, 1985-09-28 02:00 -> 01:00 # From Kıvanç Yazan (2016-09-25): # 1) For 1986-2006, DST started at 01:00 local and ended at 02:00 local, with # no exceptions. # 2) 1994's lastSun was overridden with Mar 20 ... # Here are official papers: # http://www.resmigazete.gov.tr/arsiv/19032.pdf#page=2 for 1986 # http://www.resmigazete.gov.tr/arsiv/19400.pdf#page=4 for 1987 # http://www.resmigazete.gov.tr/arsiv/19752.pdf#page=15 for 1988 # http://www.resmigazete.gov.tr/arsiv/20102.pdf#page=6 for 1989 # http://www.resmigazete.gov.tr/arsiv/20464.pdf#page=1 for 1990 - 1992 # http://www.resmigazete.gov.tr/arsiv/21531.pdf#page=15 for 1993 - 1995 # http://www.resmigazete.gov.tr/arsiv/21879.pdf#page=1 for overriding 1994 # http://www.resmigazete.gov.tr/arsiv/22588.pdf#page=1 for 1996, 1997 # http://www.resmigazete.gov.tr/arsiv/23286.pdf#page=10 for 1998 - 2000 # http://www.resmigazete.gov.tr/eskiler/2001/03/20010324.htm#2 - for 2001 # http://www.resmigazete.gov.tr/eskiler/2002/03/20020316.htm#2 - for 2002-2006 # From Paul Eggert (2016-09-25): # Prefer the above sources to Shanks & Pottenger for timestamps after 1985. # From Steffen Thorsen (2007-03-09): # Starting 2007 though, it seems that they are adopting EU's 1:00 UTC # start/end time, according to the following page (2007-03-07): # http://www.ntvmsnbc.com/news/402029.asp # The official document is located here - it is in Turkish...: # http://rega.basbakanlik.gov.tr/eskiler/2007/03/20070307-7.htm # I was able to locate the following seemingly official document # (on a non-government server though) describing dates between 2002 and 2006: # http://www.alomaliye.com/bkk_2002_3769.htm # From Gökdeniz Karadağ (2011-03-10): # According to the articles linked below, Turkey will change into summer # time zone (GMT+3) on March 28, 2011 at 3:00 a.m. instead of March 27. # This change is due to a nationwide exam on 27th. # https://www.worldbulletin.net/?aType=haber&ArticleID=70872 # Turkish: # https://www.hurriyet.com.tr/yaz-saati-uygulamasi-bir-gun-ileri-alindi-17230464 # From Faruk Pasin (2014-02-14): # The DST for Turkey has been changed for this year because of the # Turkish Local election.... # http://www.sabah.com.tr/Ekonomi/2014/02/12/yaz-saatinde-onemli-degisiklik # ... so Turkey will move clocks forward one hour on March 31 at 3:00 a.m. # From Randal L. Schwartz (2014-04-15): # Having landed on a flight from the states to Istanbul (via AMS) on March 31, # I can tell you that NOBODY (even the airlines) respected this timezone DST # change delay. Maybe the word just didn't get out in time. # From Paul Eggert (2014-06-15): # The press reported massive confusion, as election officials obeyed the rule # change but cell phones (and airline baggage systems) did not. See: # Kostidis M. Eventful elections in Turkey. Balkan News Agency # http://www.balkaneu.com/eventful-elections-turkey/ 2014-03-30. # I guess the best we can do is document the official time. # From Fatih (2015-09-29): # It's officially announced now by the Ministry of Energy. # Turkey delays winter time to 8th of November 04:00 # http://www.aa.com.tr/tr/turkiye/yaz-saati-uygulamasi-8-kasimda-sona-erecek/362217 # # From BBC News (2015-10-25): # Confused Turks are asking "what's the time?" after automatic clocks defied a # government decision ... "For the next two weeks #Turkey is on EEST... Erdogan # Engineered Standard Time," said Twitter user @aysekarahasan. # http://www.bbc.com/news/world-europe-34631326 # From Burak AYDIN (2016-09-08): # Turkey will stay in Daylight Saving Time even in winter.... # http://www.resmigazete.gov.tr/eskiler/2016/09/20160908-2.pdf # # From Paul Eggert (2016-09-07): # The change is permanent, so this is the new standard time in Turkey. # It takes effect today, which is not much notice. # From Kıvanç Yazan (2017-10-28): # Turkey will go back to Daylight Saving Time starting 2018-10. # http://www.resmigazete.gov.tr/eskiler/2017/10/20171028-5.pdf # # From Even Scharning (2017-11-08): # ... today it was announced that the DST will become "continuous": # http://www.hurriyet.com.tr/son-dakika-yaz-saati-uygulamasi-surekli-hale-geldi-40637482 # From Paul Eggert (2017-11-08): # Although Google Translate misfires on that source, it looks like # Turkey reversed last month's decision, and so will stay at +03. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Turkey 1916 only - May 1 0:00 1:00 S Rule Turkey 1916 only - Oct 1 0:00 0 - Rule Turkey 1920 only - Mar 28 0:00 1:00 S Rule Turkey 1920 only - Oct 25 0:00 0 - Rule Turkey 1921 only - Apr 3 0:00 1:00 S Rule Turkey 1921 only - Oct 3 0:00 0 - Rule Turkey 1922 only - Mar 26 0:00 1:00 S Rule Turkey 1922 only - Oct 8 0:00 0 - # Whitman gives 1923 Apr 28 - Sep 16 and no DST in 1924-1925; # go with Shanks & Pottenger. Rule Turkey 1924 only - May 13 0:00 1:00 S Rule Turkey 1924 1925 - Oct 1 0:00 0 - Rule Turkey 1925 only - May 1 0:00 1:00 S Rule Turkey 1940 only - Jul 1 0:00 1:00 S Rule Turkey 1940 only - Oct 6 0:00 0 - Rule Turkey 1940 only - Dec 1 0:00 1:00 S Rule Turkey 1941 only - Sep 21 0:00 0 - Rule Turkey 1942 only - Apr 1 0:00 1:00 S Rule Turkey 1945 only - Oct 8 0:00 0 - Rule Turkey 1946 only - Jun 1 0:00 1:00 S Rule Turkey 1946 only - Oct 1 0:00 0 - Rule Turkey 1947 1948 - Apr Sun>=16 0:00 1:00 S Rule Turkey 1947 1951 - Oct Sun>=2 0:00 0 - Rule Turkey 1949 only - Apr 10 0:00 1:00 S Rule Turkey 1950 only - Apr 16 0:00 1:00 S Rule Turkey 1951 only - Apr 22 0:00 1:00 S # DST for 15 months; unusual but we'll let it pass. Rule Turkey 1962 only - Jul 15 0:00 1:00 S Rule Turkey 1963 only - Oct 30 0:00 0 - Rule Turkey 1964 only - May 15 0:00 1:00 S Rule Turkey 1964 only - Oct 1 0:00 0 - Rule Turkey 1973 only - Jun 3 1:00 1:00 S Rule Turkey 1973 1976 - Oct Sun>=31 2:00 0 - Rule Turkey 1974 only - Mar 31 2:00 1:00 S Rule Turkey 1975 only - Mar 22 2:00 1:00 S Rule Turkey 1976 only - Mar 21 2:00 1:00 S Rule Turkey 1977 1978 - Apr Sun>=1 2:00 1:00 S Rule Turkey 1977 1978 - Oct Sun>=15 2:00 0 - Rule Turkey 1978 only - Jun 29 0:00 0 - Rule Turkey 1983 only - Jul 31 2:00 1:00 S Rule Turkey 1983 only - Oct 2 2:00 0 - Rule Turkey 1985 only - Apr 20 1:00s 1:00 S Rule Turkey 1985 only - Sep 28 1:00s 0 - Rule Turkey 1986 1993 - Mar lastSun 1:00s 1:00 S Rule Turkey 1986 1995 - Sep lastSun 1:00s 0 - Rule Turkey 1994 only - Mar 20 1:00s 1:00 S Rule Turkey 1995 2006 - Mar lastSun 1:00s 1:00 S Rule Turkey 1996 2006 - Oct lastSun 1:00s 0 - # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Europe/Istanbul 1:55:52 - LMT 1880 1:56:56 - IMT 1910 Oct # Istanbul Mean Time? 2:00 Turkey EE%sT 1978 Jun 29 3:00 Turkey %z 1984 Nov 1 2:00 2:00 Turkey EE%sT 2007 2:00 EU EE%sT 2011 Mar 27 1:00u 2:00 - EET 2011 Mar 28 1:00u 2:00 EU EE%sT 2014 Mar 30 1:00u 2:00 - EET 2014 Mar 31 1:00u 2:00 EU EE%sT 2015 Oct 25 1:00u 2:00 1:00 EEST 2015 Nov 8 1:00u 2:00 EU EE%sT 2016 Sep 7 3:00 - %z # Ukraine # # From Alois Treindl (2014-03-01): # REGULATION A N O V A on March 20, 1992 N 139 ... means that from # 1992 on, Ukraine had DST with begin time at 02:00 am, on last Sunday # in March, and end time 03:00 am, last Sunday in September.... # CABINET OF MINISTERS OF UKRAINE RESOLUTION on May 13, 1996 N 509 # "On the order of computation time on the territory of Ukraine" .... # As this cabinet decision is from May 1996, it seems likely that the # transition in March 1996, which predates it, was still at 2:00 am # and not at 3:00 as would have been under EU rules. # This is why I have set the change to EU rules into May 1996, # so that the change in March is stil covered by the Ukraine rule. # The next change in October 1996 happened under EU rules. # # From Paul Eggert (2022-08-27): # For now, assume that Ukraine's zones all followed the same rules, # except that Crimea switched to Moscow time in 1994 as described elsewhere. # From Igor Karpov, who works for the Ukrainian Ministry of Justice, # via Garrett Wollman (2003-01-27): # BTW, I've found the official document on this matter. It's government # regulations No. 509, May 13, 1996. In my poor translation it says: # "Time in Ukraine is set to second timezone (Kiev time). Each last Sunday # of March at 3am the time is changing to 4am and each last Sunday of # October the time at 4am is changing to 3am" # From Alexander Krivenyshev (2011-09-20): # On September 20, 2011 the deputies of the Verkhovna Rada agreed to # abolish the transfer clock to winter time. # # Bill No. 8330 of MP from the Party of Regions Oleg Nadoshi got # approval from 266 deputies. # # Ukraine abolishes transfer back to the winter time (in Russian) # http://news.mail.ru/politics/6861560/ # # The Ukrainians will no longer change the clock (in Russian) # http://www.segodnya.ua/news/14290482.html # # Deputies cancelled the winter time (in Russian) # https://www.pravda.com.ua/rus/news/2011/09/20/6600616/ # # From Philip Pizzey (2011-10-18): # Today my Ukrainian colleagues have informed me that the # Ukrainian parliament have decided that they will go to winter # time this year after all. # # From Udo Schwedt (2011-10-18): # As far as I understand, the recent change to the Ukrainian time zone # (Europe/Kiev) to introduce permanent daylight saving time (similar # to Russia) was reverted today: # http://portal.rada.gov.ua/rada/control/en/publish/article/info_left?art_id=287324&cat_id=105995 # # Also reported by Alexander Bokovoy (2011-10-18) who also noted: # The law documents themselves are at # http://w1.c1.rada.gov.ua/pls/zweb_n/webproc4_1?id=&pf3511=41484 # From Vladimir in Moscow via Alois Treindl re Kyiv time 1991/2 (2014-02-28): # First in Ukraine they changed Time zone from UTC+3 to UTC+2 with DST: # 03 25 1990 02:00 -03.00 1 Time Zone 3 with DST # 07 01 1990 02:00 -02.00 1 Time Zone 2 with DST # * Ukrainian Government's Resolution of 18.06.1990, No. 134. # http://search.ligazakon.ua/l_doc2.nsf/link1/T001500.html # # They did not end DST in September, 1990 (according to the law, # "summer time" was still in action): # 09 30 1990 03:00 -02.00 1 Time Zone 2 with DST # * Ukrainian Government's Resolution of 21.09.1990, No. 272. # http://search.ligazakon.ua/l_doc2.nsf/link1/KP900272.html # # Again no change in March, 1991 ("summer time" in action): # 03 31 1991 02:00 -02.00 1 Time Zone 2 with DST # # DST ended in September 1991 ("summer time" ended): # 09 29 1991 03:00 -02.00 0 Time Zone 2, no DST # * Ukrainian Government's Resolution of 25.09.1991, No. 225. # http://www.uazakon.com/documents/date_21/pg_iwgdoc.htm # This is an answer. # # Since 1992 they had normal DST procedure: # 03 29 1992 02:00 -02.00 1 DST started # 09 27 1992 03:00 -02.00 0 DST ended # * Ukrainian Government's Resolution of 20.03.1992, No. 139. # http://www.uazakon.com/documents/date_8u/pg_grcasa.htm # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Europe/Kyiv 2:02:04 - LMT 1880 2:02:04 - KMT 1924 May 2 # Kyiv Mean Time 2:00 - EET 1930 Jun 21 3:00 - MSK 1941 Sep 20 1:00 C-Eur CE%sT 1943 Nov 6 3:00 Russia MSK/MSD 1990 Jul 1 2:00 2:00 1:00 EEST 1991 Sep 29 3:00 2:00 C-Eur EE%sT 1996 May 13 2:00 EU EE%sT ############################################################################### # One source shows that Bulgaria, Cyprus, Finland, and Greece observe DST from # the last Sunday in March to the last Sunday in September in 1986. # The source shows Romania changing a day later than everybody else. # # According to Bernard Sieloff's source, Poland is in the MET time zone but # uses the WE DST rules. The Western USSR uses EET+1 and ME DST rules. # Bernard Sieloff's source claims Romania switches on the same day, but at # 00:00 standard time (i.e., 01:00 DST). It also claims that Turkey # switches on the same day, but switches on at 01:00 standard time # and off at 00:00 standard time (i.e., 01:00 DST) # ... # Date: Wed, 28 Jan 87 16:56:27 -0100 # From: Tom Hofmann # ... # # ...the European time rules are...standardized since 1981, when # most European countries started DST. Before that year, only # a few countries (UK, France, Italy) had DST, each according # to own national rules. In 1981, however, DST started on # 'Apr firstSun', and not on 'Mar lastSun' as in the following # years... # But also since 1981 there are some more national exceptions # than listed in 'europe': Switzerland, for example, joined DST # one year later, Denmark ended DST on 'Oct 1' instead of 'Sep # lastSun' in 1981 - I don't know how they handle now. # # Finally, DST ist always from 'Apr 1' to 'Oct 1' in the # Soviet Union (as far as I know). # # Tom Hofmann, Scientific Computer Center, CIBA-GEIGY AG, # 4002 Basle, Switzerland # ... # ... # Date: Wed, 4 Feb 87 22:35:22 +0100 # From: Dik T. Winter # ... # # The information from Tom Hofmann is (as far as I know) not entirely correct. # After a request from chongo at amdahl I tried to retrieve all information # about DST in Europe. I was able to find all from about 1969. # # ...standardization on DST in Europe started in about 1977 with switches on # first Sunday in April and last Sunday in September... # In 1981 UK joined Europe insofar that # the starting day for both shifted to last Sunday in March. And from 1982 # the whole of Europe used DST, with switch dates April 1 and October 1 in # the Sov[i]et Union. In 1985 the SU reverted to standard Europe[a]n switch # dates... # # It should also be remembered that time-zones are not constants; e.g. # Portugal switched in 1976 from MET (or CET) to WET with DST... # Note also that though there were rules for switch dates not # all countries abided to these dates, and many individual deviations # occurred, though not since 1982 I believe. Another note: it is always # assumed that DST is 1 hour ahead of normal time, this need not be the # case; at least in the Netherlands there have been times when DST was 2 hours # in advance of normal time. # # ... # dik t. winter, cwi, amsterdam, nederland # ... # From Bob Devine (1988-01-28): # ... # Greece: Last Sunday in April to last Sunday in September (iffy on dates). # Since 1978. Change at midnight. # ... # Monaco: has same DST as France. # ...