latest entries for Israeli time zones
Paul Eggert
eggert at twinsun.com
Sun Sep 5 10:02:07 UTC 1993
After I wrote a note in comp.risks about Solaris 2.2 time zone bugs, I got a
message from Yitschak Goldberg <yits at eandm.co.il> that the latest Olson tables
weren't right either. After asking around, Ephraim Silverberg kindly sent me
his latest info; I enclose his note at the end of this message. So I propose
the following patch to the `asia' file.
----- start of patch -----
===================================================================
RCS file: asia,v
retrieving revision 7.4
retrieving revision 7.4.1.1
diff -c -r7.4 -r7.4.1.1
*** asia 1993/06/18 03:34:10 7.4
--- asia 1993/09/05 09:58:16 7.4.1.1
***************
*** 89,315 ****
# year; as information, regarding exact times and dates during this period,
# is not readily available at the present time, the rules commence starting
# with the year 1989.
- #
- # From 1989 onwards the rules are as follows:
- #
- # 1. Daylight Savings Time commences midnight of the first Saturday night
- # following the seven-day festival of Pesach (Passover). The transition
- # is from midnight Israel Standard Time to 1 a.m. Israel Daylight Savings
- # time. As the Pesach festival is dependent on the Lunar calendar (the
- # first day is always on the 15th day of the month of Nisan), the rule
- # changes every year on the Gregorian calendar.
- #
- # 2. Standard Time is reinstated on the Saturday night whereupon Jews
- # following the Ashkenazi (European) rite begin to recite the Selichot
- # (forgiveness) prayers prior to the Jewish Lunar New Year. The transition
- # is from midnight Israel Daylight Savings time to 11 p.m. Israel Standard
- # Time. The law (according to the Ashkenazi custom) concerning the
- # commencement of the Selichot prayers is described in chapter 128, section
- # 5 of the "Code of Jewish Law," by Rabbi Shlomo Ganzfried (translated by
- # Hyman E. Goldin):
- #
- # Beginning with the Sunday [**] before Rosh Hashanah [***],
- # we rise early for the service of Selichot (supplications for
- # forgiveness). If Rosh Hashanah occurs on Monday or Tuesday, we
- # begin saying the Selichot from the Sunday of the preceding week.
- #
- # This, too, varies from year to year on the Gregorian calendar and, thus,
- # two explicit timezone rules are required for each Gregorian year.
- #
- # [**] 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
! Rule Zion 1990 only - Apr 22 0:00 1:00 D
! Rule Zion 1990 only - Sep 16 0:00 0:00 S
! Rule Zion 1991 only - Apr 7 0:00 1:00 D
Rule Zion 1991 only - Sep 1 0:00 0:00 S
! Rule Zion 1992 only - Apr 26 0:00 1:00 D
! Rule Zion 1992 only - Sep 20 0:00 0:00 S
! Rule Zion 1993 only - Apr 18 0:00 1:00 D
! Rule Zion 1993 only - Sep 12 0:00 0:00 S
! Rule Zion 1994 only - Apr 3 0:00 1:00 D
! Rule Zion 1994 only - Aug 28 0:00 0:00 S
! Rule Zion 1995 only - Apr 23 0:00 1:00 D
! Rule Zion 1995 only - Sep 17 0:00 0:00 S
! Rule Zion 1996 only - Apr 14 0:00 1:00 D
! Rule Zion 1996 only - Sep 8 0:00 0:00 S
! Rule Zion 1997 only - May 4 0:00 1:00 D
! Rule Zion 1997 only - Sep 28 0:00 0:00 S
! Rule Zion 1998 only - Apr 19 0:00 1:00 D
! Rule Zion 1998 only - Sep 13 0:00 0:00 S
! Rule Zion 1999 only - Apr 11 0:00 1:00 D
! Rule Zion 1999 only - Sep 5 0:00 0:00 S
! Rule Zion 2000 only - Apr 30 0:00 1:00 D
! Rule Zion 2000 only - Sep 24 0:00 0:00 S
! Rule Zion 2001 only - Apr 15 0:00 1:00 D
! Rule Zion 2001 only - Sep 9 0:00 0:00 S
! Rule Zion 2002 only - Apr 7 0:00 1:00 D
! Rule Zion 2002 only - Sep 1 0:00 0:00 S
! Rule Zion 2003 only - Apr 27 0:00 1:00 D
! Rule Zion 2003 only - Sep 21 0:00 0:00 S
! Rule Zion 2004 only - Apr 18 0:00 1:00 D
! Rule Zion 2004 only - Sep 12 0:00 0:00 S
! Rule Zion 2005 only - May 1 0:00 1:00 D
! Rule Zion 2005 only - Sep 25 0:00 0:00 S
! Rule Zion 2006 only - Apr 23 0:00 1:00 D
! Rule Zion 2006 only - Sep 17 0:00 0:00 S
! Rule Zion 2007 only - Apr 15 0:00 1:00 D
! Rule Zion 2007 only - Sep 9 0:00 0:00 S
! Rule Zion 2008 only - Apr 27 0:00 1:00 D
! 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
-
- # The following is a chart of the day of the week and Gregorian date of
- # the first day of Pesach and the first day of Rosh Hashanah for the years
- # 1989 through 2009 inclusive.
- #
- # First Day of Passover
- # ---------------------
- # Gregorian Year Day of Week Month Day
- # -------------- ----------- ----- ---
- # 1989 Thursday April 20
- # 1990 Tuesday April 10
- # 1991 Saturday March 30
- # 1992 Saturday April 18
- # 1993 Tuesday April 6
- # 1994 Sunday March 27
- # 1995 Saturday April 15
- # 1996 Thursday April 4
- # 1997 Tuesday April 22
- # 1998 Saturday April 11
- # 1999 Thursday April 1
- # 2000 Thursday April 20
- # 2001 Sunday April 8
- # 2002 Thursday March 28
- # 2003 Thursday April 17
- # 2004 Tuesday April 6
- # 2005 Sunday April 24
- # 2006 Thursday April 13
- # 2007 Tuesday April 3
- # 2008 Sunday April 20
- # 2009 Thursday April 9
- #
- # First Day of Rosh Hashanah
- # --------------------------
- # Gregorian Year Day of Week Month Day
- # -------------- ----------- ----- ---
- # 1989 Saturday September 30
- # 1990 Thursday September 20
- # 1991 Monday September 9
- # 1992 Monday September 28
- # 1993 Thursday September 16
- # 1994 Tuesday September 6
- # 1995 Monday September 25
- # 1996 Saturday September 14
- # 1997 Thursday October 2
- # 1998 Monday September 21
- # 1999 Saturday September 11
- # 2000 Saturday September 30
- # 2001 Tuesday September 18
- # 2002 Saturday September 7
- # 2003 Saturday September 27
- # 2004 Thursday September 16
- # 2005 Tuesday October 4
- # 2006 Saturday September 23
- # 2007 Thursday September 13
- # 2008 Tuesday September 30
- # 2009 Saturday September 19
###############################################################################
--- 89,132 ----
# year; as information, regarding exact times and dates during this period,
# is not readily available at the present time, the rules commence starting
# with the year 1989.
! # From Ephraim Silverberg (September 5, 1993):
#
! # According to the Office of the Secretary General of the Ministry of
! # Interior, there is NO set rule for Daylight-Savings/Standard time changes.
! # Each year they decide anew what havoc to wreak on the country. However,
! # there is a "supposed" set of rules which is subject to change depending
! # on the party the Minister of Interior, the size of the coalition
! # government, the phase of the moon and the direction of the wind. Hence,
! # changes may need to be made on a semi-annual basis. One thing is entrenched
! # in law, however: that there must be at least 150 days on daylight savings
! # time annually.
# 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 3 0:00 0:00 S
! Rule Zion 1990 only - Mar 25 0:00 1:00 D
! Rule Zion 1990 only - Aug 26 0:00 0:00 S
! Rule Zion 1991 only - Mar 24 0:00 1:00 D
Rule Zion 1991 only - Sep 1 0:00 0:00 S
! Rule Zion 1992 only - Mar 29 0:00 1:00 D
! Rule Zion 1992 only - Sep 6 0:00 0:00 S
! Rule Zion 1993 only - Apr 2 0:00 1:00 D
! Rule Zion 1993 only - Sep 5 0:00 0:00 S
+ # The dates for 1994-1995 were obtained from Office of the Spokeswoman for
+ # the Ministry of Interior, Jerusalem. There are no dates yet for 1996 and
+ # beyond so your guess is as good as theirs (those who are interested can
+ # call 972-2-701411 and ask for the spokeswoman).
+
+ # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
+ Rule Zion 1994 only - Apr 1 0:00 1:00 D
+ Rule Zion 1994 only - Aug 28 0:00 0:00 S
+ Rule Zion 1995 only - Mar 31 0:00 1:00 D
+ Rule Zion 1995 only - Aug 27 0:00 0:00 S
+
# Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL]
Zone Israel 2:00 Zion I%sT
###############################################################################
----- end of patch -----
From: Ephraim Silverberg <ephraim at CS.HUJI.AC.IL>
Subject: Re: bugs in entries for Israeli time zones?
To: eggert at twinsun.com (Paul Eggert)
Date: Sun, 5 Sep 93 11:12:02 EET
In-Reply-To: <9309022041.AA15967 at spot.twinsun.com>; from "Paul Eggert" at Sep 2, 93 1:40 pm
> The latest version of Arthur David Olson's time zone package claims that
> Israel switches from summer time to winter time on September 12. But Yitschak
> Goldberg <yits at eandm.co.il> writes that it really switches on Sept. 5 this
> year. Here is the current entry. Could you tell me what sort of corrections
> are needed? I'd like to forward the fixes to Olson (and also to Richard
> Stallman, the Emacs author).
>
> I'm interested in both the historical dates that the time zones changed, and
> in the current rules (even if they are likely to change soon). Please don't
> feel that you need to make detailed corrections to all this glop! I just
> need to know what the current rules are and what the actual transitions
> were between 1989 and now. Thanks for any help you can provide.
Hi.
Appended is the ZIC file with the most current information.
Ephraim
--------------------------------------------------------------------------------
# Zone Information Compiler (ZIC) File for the State of Israel (1989-2009)
# According to the Office of the Secretary General of the Ministry of
# Interior, there is NO set rule for Daylight-Savings/Standard time changes.
# Each year they decide anew what havoc to wreak on the country. However,
# there is a "supposed" set of rules which is subject to change depending
# on the party the Minister of Interior, the size of the coalition
# government, the phase of the moon and the direction of the wind. Hence,
# changes may need to be made on a semi-annual basis. One thing is entrenched
# in law, however: that there must be at least 150 days on daylight savings
# time annually.
# 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 3 0:00 0:00 S
Rule Zion 1990 only - Mar 25 0:00 1:00 D
Rule Zion 1990 only - Aug 26 0:00 0:00 S
Rule Zion 1991 only - Mar 24 0:00 1:00 D
Rule Zion 1991 only - Sep 1 0:00 0:00 S
Rule Zion 1992 only - Mar 29 0:00 1:00 D
Rule Zion 1992 only - Sep 6 0:00 0:00 S
Rule Zion 1993 only - Apr 2 0:00 1:00 D
Rule Zion 1993 only - Sep 5 0:00 0:00 S
# The dates for 1994-1995 were obtained from Office of the Spokeswoman for
# the Ministry of Interior, Jerusalem. There are no dates yet for 1996 and
# beyond so your guess is as good as theirs (those who are interested can
# call 972-2-701411 and ask for the spokeswoman).
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Zion 1994 only - Apr 1 0:00 1:00 D
Rule Zion 1994 only - Aug 28 0:00 0:00 S
Rule Zion 1995 only - Mar 31 0:00 1:00 D
Rule Zion 1995 only - Aug 27 0:00 0:00 S
# These rules are probably wrong, but they are close approximations (usually
# withing two weeks):
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Zion 1996 only - Apr 14 0:00 1:00 D
Rule Zion 1996 only - Sep 8 0:00 0:00 S
Rule Zion 1997 only - May 4 0:00 1:00 D
Rule Zion 1997 only - Sep 28 0:00 0:00 S
Rule Zion 1998 only - Apr 19 0:00 1:00 D
Rule Zion 1998 only - Sep 13 0:00 0:00 S
Rule Zion 1999 only - Apr 11 0:00 1:00 D
Rule Zion 1999 only - Sep 5 0:00 0:00 S
Rule Zion 2000 only - Apr 30 0:00 1:00 D
Rule Zion 2000 only - Sep 24 0:00 0:00 S
Rule Zion 2001 only - Apr 15 0:00 1:00 D
Rule Zion 2001 only - Sep 9 0:00 0:00 S
Rule Zion 2002 only - Apr 7 0:00 1:00 D
Rule Zion 2002 only - Sep 1 0:00 0:00 S
Rule Zion 2003 only - Apr 27 0:00 1:00 D
Rule Zion 2003 only - Sep 21 0:00 0:00 S
Rule Zion 2004 only - Apr 18 0:00 1:00 D
Rule Zion 2004 only - Sep 12 0:00 0:00 S
Rule Zion 2005 only - May 1 0:00 1:00 D
Rule Zion 2005 only - Sep 25 0:00 0:00 S
Rule Zion 2006 only - Apr 23 0:00 1:00 D
Rule Zion 2006 only - Sep 17 0:00 0:00 S
Rule Zion 2007 only - Apr 15 0:00 1:00 D
Rule Zion 2007 only - Sep 9 0:00 0:00 S
Rule Zion 2008 only - Apr 27 0:00 1:00 D
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
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Israel 2:00 Zion I%sT
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