function [ y, m, d, f ] = jed_to_ymdf_saka ( jed ) %*****************************************************************************80 % %% JED_TO_YMDF_SAKA converts a JED to a Saka YMDF date. % % Licensing: % % This code is distributed under the GNU LGPL license. % % Modified: % % 15 July 2012 % % Author: % % John Burkardt % % Reference: % % Edward Richards, % Algorithm F, % Mapping Time, The Calendar and Its History, % Oxford, 1999, pages 324-325. % % Parameters: % % Input, real JED, the Julian Ephemeris Date. % % Output, integer Y, M, D, real F, % the YMDF date. % % % Determine the computational date (Y'/M'/D'). % j = floor ( jed + 0.5 ); f = ( jed + 0.5 ) - j; g = floor ( ( 4 * j + 274073 ) / 146097 ); g = floor ( ( 3 * g ) / 4 ) ) - 36; j_prime = j + 1348 + g; y_prime = floor ( ( 4 * j_prime + 3 ) / 1461 ); t_prime = floor ( mod ( 4 * j_prime + 3, 1461 ) / 4 ); x = floor ( t_prime / 365 ); z = floor ( t_prime / 185 ) - x; s = 31 - z; m_prime = floor ( ( t_prime - 5 * z ) / s ); d_prime = 6 * x + mod ( t_prime - 5 * z, s ); % % Convert the computational date to a calendar date. % d = d_prime + 1; m = mod ( m_prime + 1, 12 ) + 1; y = y_prime - 4794 + floor ( ( 13 - m ) / 12 ); return end