# Links and zones for backward compatibility # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. # This file provides links from old or merged timezone names to current ones. # It also provides a few zone entries for old naming conventions. # Many names changed in 1993 and in 1995, and many merged names moved here # in the period from 2013 through 2022. Several of these names are # also present in the file 'backzone', which has data important only # for pre-1970 timestamps and so is out of scope for tzdb proper. # Although this file is optional and tzdb will work if you omit it by # building with 'make BACKWARD=', in practice downstream users # typically use this file for backward compatibility. # This file is divided into sections, one for each major reason for a # backward compatibility link or zone. Each section of links is # sorted by name. # A "#= TARGET1" comment labels each link inserted only because some # .zi parsers (including tzcode through 2022e) mishandle links to links. # The comment says what the target would be if these parsers were fixed # so that data could contain links to links. For example, the line # "Link Australia/Sydney Australia/ACT #= Australia/Canberra" would be # "Link Australia/Canberra Australia/ACT" were it not that data lines # refrain from linking to links like Australia/Canberra, which means # the Australia/ACT line links instead to Australia/Sydney, # Australia/Canberra's target. # Pre-1993 naming conventions # Link TARGET LINK-NAME #= TARGET1 Link Australia/Sydney Australia/ACT #= Australia/Canberra Link Australia/Lord_Howe Australia/LHI Link Australia/Sydney Australia/NSW Link Australia/Darwin Australia/North Link Australia/Brisbane Australia/Queensland Link Australia/Adelaide Australia/South Link Australia/Hobart Australia/Tasmania Link Australia/Melbourne Australia/Victoria Link Australia/Perth Australia/West Link Australia/Broken_Hill Australia/Yancowinna Link America/Rio_Branco Brazil/Acre #= America/Porto_Acre Link America/Noronha Brazil/DeNoronha Link America/Sao_Paulo Brazil/East Link America/Manaus Brazil/West Link Europe/Brussels CET Link America/Halifax Canada/Atlantic Link America/Winnipeg Canada/Central # This line is commented out, as the name exceeded the 14-character limit # and was an unused misnomer. #Link America/Regina Canada/East-Saskatchewan Link America/Toronto Canada/Eastern Link America/Edmonton Canada/Mountain Link America/St_Johns Canada/Newfoundland Link America/Vancouver Canada/Pacific Link America/Regina Canada/Saskatchewan Link America/Whitehorse Canada/Yukon Link America/Santiago Chile/Continental Link Pacific/Easter Chile/EasterIsland Link America/Havana Cuba Link Europe/Athens EET Link America/Panama EST Link Africa/Cairo Egypt Link Europe/Dublin Eire # Vanguard section, for most .zi parsers. #Link GMT Etc/GMT #Link GMT Etc/GMT+0 #Link GMT Etc/GMT-0 #Link GMT Etc/GMT0 #Link GMT Etc/Greenwich # Rearguard section, for TZUpdater 2.3.2 and earlier. Link Etc/GMT Etc/GMT+0 Link Etc/GMT Etc/GMT-0 Link Etc/GMT Etc/GMT0 Link Etc/GMT Etc/Greenwich # End of rearguard section. Link Etc/UTC Etc/UCT Link Etc/UTC Etc/Universal Link Etc/UTC Etc/Zulu Link Europe/London GB Link Europe/London GB-Eire # Vanguard section, for most .zi parsers. #Link GMT GMT+0 #Link GMT GMT-0 #Link GMT GMT0 #Link GMT Greenwich # Rearguard section, for TZUpdater 2.3.2 and earlier. Link Etc/GMT GMT+0 Link Etc/GMT GMT-0 Link Etc/GMT GMT0 Link Etc/GMT Greenwich # End of rearguard section. Link Asia/Hong_Kong Hongkong Link Africa/Abidjan Iceland #= Atlantic/Reykjavik Link Asia/Tehran Iran Link Asia/Jerusalem Israel Link America/Jamaica Jamaica Link Asia/Tokyo Japan Link Pacific/Kwajalein Kwajalein Link Africa/Tripoli Libya Link Europe/Brussels MET Link America/Phoenix MST Link America/Tijuana Mexico/BajaNorte Link America/Mazatlan Mexico/BajaSur Link America/Mexico_City Mexico/General Link Pacific/Auckland NZ Link Pacific/Chatham NZ-CHAT Link America/Denver Navajo #= America/Shiprock Link Asia/Shanghai PRC Link Europe/Warsaw Poland Link Europe/Lisbon Portugal Link Asia/Taipei ROC Link Asia/Seoul ROK Link Asia/Singapore Singapore Link Europe/Istanbul Turkey Link Etc/UTC UCT Link America/Anchorage US/Alaska Link America/Adak US/Aleutian Link America/Phoenix US/Arizona Link America/Chicago US/Central Link America/Indiana/Indianapolis US/East-Indiana Link America/New_York US/Eastern Link Pacific/Honolulu US/Hawaii Link America/Indiana/Knox US/Indiana-Starke Link America/Detroit US/Michigan Link America/Denver US/Mountain Link America/Los_Angeles US/Pacific Link Pacific/Pago_Pago US/Samoa Link Etc/UTC UTC Link Etc/UTC Universal Link Europe/Moscow W-SU Link Etc/UTC Zulu # Two-part names that were renamed mostly to three-part names in 1995 # Link TARGET LINK-NAME #= TARGET1 Link America/Argentina/Buenos_Aires America/Buenos_Aires Link America/Argentina/Catamarca America/Catamarca Link America/Argentina/Cordoba America/Cordoba Link America/Indiana/Indianapolis America/Indianapolis Link America/Argentina/Jujuy America/Jujuy Link America/Indiana/Knox America/Knox_IN Link America/Kentucky/Louisville America/Louisville Link America/Argentina/Mendoza America/Mendoza Link America/Puerto_Rico America/Virgin #= America/St_Thomas Link Pacific/Pago_Pago Pacific/Samoa # Pre-2013 practice, which typically had a Zone per zone.tab line # Link TARGET LINK-NAME Link Africa/Abidjan Africa/Accra Link Africa/Nairobi Africa/Addis_Ababa Link Africa/Nairobi Africa/Asmara Link Africa/Abidjan Africa/Bamako Link Africa/Lagos Africa/Bangui Link Africa/Abidjan Africa/Banjul Link Africa/Maputo Africa/Blantyre Link Africa/Lagos Africa/Brazzaville Link Africa/Maputo Africa/Bujumbura Link Africa/Abidjan Africa/Conakry Link Africa/Abidjan Africa/Dakar Link Africa/Nairobi Africa/Dar_es_Salaam Link Africa/Nairobi Africa/Djibouti Link Africa/Lagos Africa/Douala Link Africa/Abidjan Africa/Freetown Link Africa/Maputo Africa/Gaborone Link Africa/Maputo Africa/Harare Link Africa/Nairobi Africa/Kampala Link Africa/Maputo Africa/Kigali Link Africa/Lagos Africa/Kinshasa Link Africa/Lagos Africa/Libreville Link Africa/Abidjan Africa/Lome Link Africa/Lagos Africa/Luanda Link Africa/Maputo Africa/Lubumbashi Link Africa/Maputo Africa/Lusaka Link Africa/Lagos Africa/Malabo Link Africa/Johannesburg Africa/Maseru Link Africa/Johannesburg Africa/Mbabane Link Africa/Nairobi Africa/Mogadishu Link Africa/Lagos Africa/Niamey Link Africa/Abidjan Africa/Nouakchott Link Africa/Abidjan Africa/Ouagadougou Link Africa/Lagos Africa/Porto-Novo Link America/Puerto_Rico America/Anguilla Link America/Puerto_Rico America/Antigua Link America/Puerto_Rico America/Aruba Link America/Panama America/Atikokan Link America/Puerto_Rico America/Blanc-Sablon Link America/Panama America/Cayman Link America/Phoenix America/Creston Link America/Puerto_Rico America/Curacao Link America/Puerto_Rico America/Dominica Link America/Puerto_Rico America/Grenada Link America/Puerto_Rico America/Guadeloupe Link America/Puerto_Rico America/Kralendijk Link America/Puerto_Rico America/Lower_Princes Link America/Puerto_Rico America/Marigot Link America/Puerto_Rico America/Montserrat Link America/Toronto America/Nassau Link America/Puerto_Rico America/Port_of_Spain Link America/Puerto_Rico America/St_Barthelemy Link America/Puerto_Rico America/St_Kitts Link America/Puerto_Rico America/St_Lucia Link America/Puerto_Rico America/St_Thomas Link America/Puerto_Rico America/St_Vincent Link America/Puerto_Rico America/Tortola Link Pacific/Port_Moresby Antarctica/DumontDUrville Link Pacific/Auckland Antarctica/McMurdo Link Asia/Riyadh Antarctica/Syowa Link Europe/Berlin Arctic/Longyearbyen Link Asia/Riyadh Asia/Aden Link Asia/Qatar Asia/Bahrain Link Asia/Kuching Asia/Brunei Link Asia/Singapore Asia/Kuala_Lumpur Link Asia/Riyadh Asia/Kuwait Link Asia/Dubai Asia/Muscat Link Asia/Bangkok Asia/Phnom_Penh Link Asia/Bangkok Asia/Vientiane Link Africa/Abidjan Atlantic/Reykjavik Link Africa/Abidjan Atlantic/St_Helena Link Europe/Brussels Europe/Amsterdam Link Europe/Prague Europe/Bratislava Link Europe/Zurich Europe/Busingen Link Europe/Berlin Europe/Copenhagen Link Europe/London Europe/Guernsey Link Europe/London Europe/Isle_of_Man Link Europe/London Europe/Jersey Link Europe/Belgrade Europe/Ljubljana Link Europe/Brussels Europe/Luxembourg Link Europe/Helsinki Europe/Mariehamn Link Europe/Paris Europe/Monaco Link Europe/Berlin Europe/Oslo Link Europe/Belgrade Europe/Podgorica Link Europe/Rome Europe/San_Marino Link Europe/Belgrade Europe/Sarajevo Link Europe/Belgrade Europe/Skopje Link Europe/Berlin Europe/Stockholm Link Europe/Zurich Europe/Vaduz Link Europe/Rome Europe/Vatican Link Europe/Belgrade Europe/Zagreb Link Africa/Nairobi Indian/Antananarivo Link Asia/Bangkok Indian/Christmas Link Asia/Yangon Indian/Cocos Link Africa/Nairobi Indian/Comoro Link Indian/Maldives Indian/Kerguelen Link Asia/Dubai Indian/Mahe Link Africa/Nairobi Indian/Mayotte Link Asia/Dubai Indian/Reunion Link Pacific/Port_Moresby Pacific/Chuuk Link Pacific/Tarawa Pacific/Funafuti Link Pacific/Tarawa Pacific/Majuro Link Pacific/Pago_Pago Pacific/Midway Link Pacific/Guadalcanal Pacific/Pohnpei Link Pacific/Guam Pacific/Saipan Link Pacific/Tarawa Pacific/Wake Link Pacific/Tarawa Pacific/Wallis # Non-zone.tab locations with timestamps since 1970 that duplicate # those of an existing location # Link TARGET LINK-NAME Link Africa/Abidjan Africa/Timbuktu Link America/Argentina/Catamarca America/Argentina/ComodRivadavia Link America/Adak America/Atka Link America/Panama America/Coral_Harbour Link America/Tijuana America/Ensenada Link America/Indiana/Indianapolis America/Fort_Wayne Link America/Toronto America/Montreal Link America/Toronto America/Nipigon Link America/Iqaluit America/Pangnirtung Link America/Rio_Branco America/Porto_Acre Link America/Winnipeg America/Rainy_River Link America/Argentina/Cordoba America/Rosario Link America/Tijuana America/Santa_Isabel Link America/Denver America/Shiprock Link America/Toronto America/Thunder_Bay Link America/Edmonton America/Yellowknife Link Pacific/Auckland Antarctica/South_Pole Link Asia/Ulaanbaatar Asia/Choibalsan Link Asia/Shanghai Asia/Chongqing Link Asia/Shanghai Asia/Harbin Link Asia/Urumqi Asia/Kashgar Link Asia/Jerusalem Asia/Tel_Aviv Link Europe/Berlin Atlantic/Jan_Mayen Link Australia/Sydney Australia/Canberra Link Australia/Hobart Australia/Currie Link Europe/London Europe/Belfast Link Europe/Chisinau Europe/Tiraspol Link Europe/Kyiv Europe/Uzhgorod Link Europe/Kyiv Europe/Zaporozhye Link Pacific/Kanton Pacific/Enderbury Link Pacific/Honolulu Pacific/Johnston Link Pacific/Port_Moresby Pacific/Yap Link Europe/Lisbon WET # Alternate names for the same location # Link TARGET LINK-NAME #= TARGET1 Link Africa/Nairobi Africa/Asmera #= Africa/Asmara Link America/Nuuk America/Godthab Link Asia/Ashgabat Asia/Ashkhabad Link Asia/Kolkata Asia/Calcutta Link Asia/Shanghai Asia/Chungking #= Asia/Chongqing Link Asia/Dhaka Asia/Dacca # Istanbul is in both continents. Link Europe/Istanbul Asia/Istanbul Link Asia/Kathmandu Asia/Katmandu Link Asia/Macau Asia/Macao Link Asia/Yangon Asia/Rangoon Link Asia/Ho_Chi_Minh Asia/Saigon Link Asia/Thimphu Asia/Thimbu Link Asia/Makassar Asia/Ujung_Pandang Link Asia/Ulaanbaatar Asia/Ulan_Bator Link Atlantic/Faroe Atlantic/Faeroe Link Europe/Kyiv Europe/Kiev # Classically, Cyprus is in Asia; e.g. see Herodotus, Histories, I.72. # However, for various reasons many users expect to find it under Europe. Link Asia/Nicosia Europe/Nicosia Link Pacific/Honolulu HST Link Pacific/Guadalcanal Pacific/Ponape #= Pacific/Pohnpei Link Pacific/Port_Moresby Pacific/Truk #= Pacific/Chuuk # The backward-compatibility zones PST8PDT, MST7MDT, CST6CDT, and EST5EDT # Near-copy of US rules in the northamerica file, # so that this file can be compiled separately. # To conform to POSIX, this copy uses D instead of W for War and P for Peace. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule USback 1918 1919 - Mar lastSun 2:00 1:00 D Rule USback 1918 1919 - Oct lastSun 2:00 0 S Rule USback 1942 only - Feb 9 2:00 1:00 D # War Rule USback 1945 only - Aug 14 23:00u 1:00 D # Peace Rule USback 1945 only - Sep 30 2:00 0 S Rule USback 1967 2006 - Oct lastSun 2:00 0 S Rule USback 1967 1973 - Apr lastSun 2:00 1:00 D Rule USback 1974 only - Jan 6 2:00 1:00 D Rule USback 1975 only - Feb lastSun 2:00 1:00 D Rule USback 1976 1986 - Apr lastSun 2:00 1:00 D Rule USback 1987 2006 - Apr Sun>=1 2:00 1:00 D Rule USback 2007 max - Mar Sun>=8 2:00 1:00 D Rule USback 2007 max - Nov Sun>=1 2:00 0 S # From Arthur David Olson (2005-12-19): # We generate the files specified below to guard against old files with # obsolete information being left in the time zone binary directory. # We limit the list to names that have appeared in previous versions of # this time zone package. # We do these as separate Zones rather than as Links to avoid problems if # a particular place changes whether it observes DST. # # From Paul Eggert (2026-07-24): # These zones are for backward compatibility with Unix System V (1983). # They are ahistorical, in that they pretend standard time extends # backward indefinitely into the past. # They use USback (not US) rules so that they conform to POSIX instead # of using abbreviations like EWT for Eastern War Time during World War II. # The zones are here, not in the northamerica file, to lessen # confusion downstream by making it clear that the zones are present # only for backward compatibility. # New software should use settings like TZ='America/New_York' instead # of these backwards-compatibility zones. # # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone PST8PDT -8:00 USback P%sT Zone MST7MDT -7:00 USback M%sT Zone CST6CDT -6:00 USback C%sT Zone EST5EDT -5:00 USback E%sT