Here's a patch to the Zion rules that gives a program to generate the rules, plus the DST transitions for the years 2010 through 2037. =================================================================== RCS file: asia,v retrieving revision 1.1 retrieving revision 1.2 diff -c -r1.1 -r1.2 *** asia 1992/04/23 17:34:49 1.1 --- asia 1993/06/17 00:04:53 1.2 *************** *** 119,124 **** --- 119,157 ---- # [**] actually Saturday night as the Jewish day commences at nightfall. # [***] the Jewish Lunar New Year. + # From Paul Eggert (June 16, 1993). Ed Reingold and I converted the above + # rules into the following Emacs lisp code. It requires GNU Emacs 19.13 + # or later. If you run the code, the Zion rules will be inserted into + # your Emacs buffer. Reference: ``Calendrical Calculations'' by Nachum + # Dershowitz and Edward M. Reingold, Software--Practice and Experience, + # Volume 20, Number 9 (September, 1990), pages 899-928. + # + # (calendar-for-loop + # year from 1989 to 2037 do + # (let ((dst-starts + # (calendar-gregorian-from-absolute + # (calendar-dayname-on-or-before + # 0 + # (calendar-absolute-from-hebrew + # (list 1 28 (+ year 3760)))))) + # (dst-ends + # (calendar-gregorian-from-absolute + # (calendar-dayname-on-or-before + # 0 + # (- (calendar-absolute-from-hebrew (list 7 1 (+ year 3761))) 3))))) + # (insert (format "Rule\tZion\t%d\tonly\t-\t%3s\t%2d\t0:00\t1:00\tD\n" + # year + # (substring + # (calendar-month-name (extract-calendar-month dst-starts)) + # 0 3) + # (extract-calendar-day dst-starts))) + # (insert (format "Rule\tZion\t%d\tonly\t-\t%3s\t%2d\t0:00\t0:00\tS\n" + # year + # (substring + # (calendar-month-name (extract-calendar-month dst-ends)) + # 0 3) + # (extract-calendar-day dst-ends))))) + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Zion 1989 only - Apr 30 0:00 1:00 D Rule Zion 1989 only - Sep 24 0:00 0:00 S *************** *** 162,167 **** --- 195,256 ---- Rule Zion 2008 only - Sep 21 0:00 0:00 S Rule Zion 2009 only - Apr 19 0:00 1:00 D Rule Zion 2009 only - Sep 13 0:00 0:00 S + Rule Zion 2010 only - Apr 11 0:00 1:00 D + Rule Zion 2010 only - Sep 5 0:00 0:00 S + Rule Zion 2011 only - May 1 0:00 1:00 D + Rule Zion 2011 only - Sep 25 0:00 0:00 S + Rule Zion 2012 only - Apr 15 0:00 1:00 D + Rule Zion 2012 only - Sep 9 0:00 0:00 S + Rule Zion 2013 only - Apr 7 0:00 1:00 D + Rule Zion 2013 only - Sep 1 0:00 0:00 S + Rule Zion 2014 only - Apr 27 0:00 1:00 D + Rule Zion 2014 only - Sep 21 0:00 0:00 S + Rule Zion 2015 only - Apr 12 0:00 1:00 D + Rule Zion 2015 only - Sep 6 0:00 0:00 S + Rule Zion 2016 only - May 1 0:00 1:00 D + Rule Zion 2016 only - Sep 25 0:00 0:00 S + Rule Zion 2017 only - Apr 23 0:00 1:00 D + Rule Zion 2017 only - Sep 17 0:00 0:00 S + Rule Zion 2018 only - Apr 8 0:00 1:00 D + Rule Zion 2018 only - Sep 2 0:00 0:00 S + Rule Zion 2019 only - Apr 28 0:00 1:00 D + Rule Zion 2019 only - Sep 22 0:00 0:00 S + Rule Zion 2020 only - Apr 19 0:00 1:00 D + Rule Zion 2020 only - Sep 13 0:00 0:00 S + Rule Zion 2021 only - Apr 4 0:00 1:00 D + Rule Zion 2021 only - Aug 29 0:00 0:00 S + Rule Zion 2022 only - Apr 24 0:00 1:00 D + Rule Zion 2022 only - Sep 18 0:00 0:00 S + Rule Zion 2023 only - Apr 16 0:00 1:00 D + Rule Zion 2023 only - Sep 10 0:00 0:00 S + Rule Zion 2024 only - May 5 0:00 1:00 D + Rule Zion 2024 only - Sep 29 0:00 0:00 S + Rule Zion 2025 only - Apr 20 0:00 1:00 D + Rule Zion 2025 only - Sep 14 0:00 0:00 S + Rule Zion 2026 only - Apr 12 0:00 1:00 D + Rule Zion 2026 only - Sep 6 0:00 0:00 S + Rule Zion 2027 only - May 2 0:00 1:00 D + Rule Zion 2027 only - Sep 26 0:00 0:00 S + Rule Zion 2028 only - Apr 23 0:00 1:00 D + Rule Zion 2028 only - Sep 17 0:00 0:00 S + Rule Zion 2029 only - Apr 8 0:00 1:00 D + Rule Zion 2029 only - Sep 2 0:00 0:00 S + Rule Zion 2030 only - Apr 28 0:00 1:00 D + Rule Zion 2030 only - Sep 22 0:00 0:00 S + Rule Zion 2031 only - Apr 20 0:00 1:00 D + Rule Zion 2031 only - Sep 14 0:00 0:00 S + Rule Zion 2032 only - Apr 4 0:00 1:00 D + Rule Zion 2032 only - Aug 29 0:00 0:00 S + Rule Zion 2033 only - Apr 24 0:00 1:00 D + Rule Zion 2033 only - Sep 18 0:00 0:00 S + Rule Zion 2034 only - Apr 16 0:00 1:00 D + Rule Zion 2034 only - Sep 10 0:00 0:00 S + Rule Zion 2035 only - May 6 0:00 1:00 D + Rule Zion 2035 only - Sep 30 0:00 0:00 S + Rule Zion 2036 only - Apr 20 0:00 1:00 D + Rule Zion 2036 only - Sep 14 0:00 0:00 S + Rule Zion 2037 only - Apr 12 0:00 1:00 D + Rule Zion 2037 only - Sep 6 0:00 0:00 S # Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL] Zone Israel 2:00 Zion I%sT