- tz - lists.iana.org

tzcode93e.tar.Z and tzdata93e.tar.Z
by ado Sept. 6, 1993

Sept. 6, 1993

Updated versions of the time zone stuff are available by anonymous ftp from elsie.nci.nih.gov (128.231.16.1); you'll want the files tzcode93e.tar.Z and tzdata93e.tar.Z from the "pub" directory. There's updated data for Israel, England, and Kwajalein; there's also an update to "zdump" to cope with Kwajalein's 24-hour jump. Thanks to Paul Eggert and Peter Ilieve for the changes. --ado

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latest entries for Israeli time zones
by eggert＠twinsun.com Sept. 5, 1993

Sept. 5, 1993

After I wrote a note in comp.risks about Solaris 2.2 time zone bugs, I got a message from Yitschak Goldberg <yits(a)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(a)CS.HUJI.AC.IL> Subject: Re: bugs in entries for Israeli time zones? To: eggert(a)twinsun.com (Paul Eggert) Date: Sun, 5 Sep 93 11:12:02 EET In-Reply-To: <9309022041.AA15967(a)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(a)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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Re: Kwajalein bug fix
by ado Aug. 28, 1993

Aug. 28, 1993

Thanks to Paul Eggert for the Kwajalein changes. My notions on how to do it are attached. It might be better to toss Kwajalein into australasia than to create a new file; as I recall, some vendors might be using a "patch" scheme that's better at handling changes than handling additions. I also took the opportunity while visiting zdump to eliminate the "VERY approximate" kludge in handling zdump's "-c" option. (Given the relentless increase in processor power, maybe the better thing to do is eliminate the "-c" option.) I'll wait a bit for feedback from this list; eventually folks should expect to see tzcode93e.tar.Z and tzdata93e.tar.Z on elsie.nci.nih.gov. --ado SCCS/s.australasia: 7.13 vs. 7.14 *** 7.13/australasia Sat Aug 28 12:29:52 1993 --- 7.14/australasia Sat Aug 28 12:29:52 1993 *************** *** 1,4 **** ! # @(#)australasia 7.13 # Notes are at the end of this file --- 1,4 ---- ! # @(#)australasia 7.14 # Notes are at the end of this file *************** *** 105,110 **** --- 105,118 ---- ############################################################################### + # Kwajalein + + # Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL] + Zone Kwajalein -12:00 - KST 1993 Aug 20 + 12:00 - KST + + ############################################################################### + # NOTES ############################################################################### *************** *** 431,433 **** --- 439,451 ---- # From Arthur David Olson (March 8, 1992): # The chosen rules use the Davies October 8 values for the start of DST in 1989 # rather than the October 1 value. + + ############################################################################### + + # Kwajalein + + # In comp.risks 14.87 (26 August 1993), Peter Neumann writes: + # I wonder what happened in Kwajalein, where there was NO Friday, + # August 20, 1993. Thursday night at midnight Kwajalein switched sides with + # respect to the International Date Line, to rejoin its fellow islands, + # going from 11:59 p.m. Thursday to 12:00 m. Saturday in a blink. SCCS/s.zdump.c: 7.3 vs. 7.5 *** 7.3/zdump.c Sat Aug 28 12:30:03 1993 --- 7.5/zdump.c Sat Aug 28 12:30:03 1993 *************** *** 1,6 **** #ifndef lint #ifndef NOID ! static char elsieid[] = "@(#)zdump.c 7.3"; #endif /* !defined NOID */ #endif /* !defined lint */ --- 1,6 ---- #ifndef lint #ifndef NOID ! static char elsieid[] = "@(#)zdump.c 7.5"; #endif /* !defined NOID */ #endif /* !defined lint */ *************** *** 39,46 **** #define SECSPERMIN 60 #endif /* !defined SECSPERMIN */ #ifndef SECSPERHOUR ! #define SECSPERHOUR 3600 #endif /* !defined SECSPERHOUR */ #ifndef HOURSPERDAY --- 39,50 ---- #define SECSPERMIN 60 #endif /* !defined SECSPERMIN */ + #ifndef MINSPERHOUR + #define MINSPERHOUR 60 + #endif /* !defined MINSPERHOUR */ + #ifndef SECSPERHOUR ! #define SECSPERHOUR (SECSPERMIN * MINSPERHOUR) #endif /* !defined SECSPERHOUR */ #ifndef HOURSPERDAY *************** *** 51,60 **** --- 55,72 ---- #define EPOCH_YEAR 1970 #endif /* !defined EPOCH_YEAR */ + #ifndef TM_YEAR_BASE + #define TM_YEAR_BASE 1900 + #endif /* !defined TM_YEAR_BASE */ + #ifndef DAYSPERNYEAR #define DAYSPERNYEAR 365 #endif /* !defined DAYSPERNYEAR */ + #ifndef isleap + #define isleap(y) ((((y) % 4) == 0 && ((y) % 100) != 0) || ((y) % 400) == 0) + #endif /* !defined isleap */ + extern char ** environ; extern int getopt(); extern char * optarg; *************** *** 104,116 **** argv[0], argv[0]); (void) exit(EXIT_FAILURE); } ! if (cutoff != NULL) cutyear = atoi(cutoff); ! /* ! ** VERY approximate. ! */ ! cuttime = (long) (cutyear - EPOCH_YEAR) * ! SECSPERHOUR * HOURSPERDAY * DAYSPERNYEAR; (void) time(&now); longest = 0; for (i = optind; i < argc; ++i) --- 116,130 ---- argv[0], argv[0]); (void) exit(EXIT_FAILURE); } ! if (cutoff != NULL) { ! int y; ! cutyear = atoi(cutoff); ! cuttime = 0; ! for (y = EPOCH_YEAR; y < cutyear; ++y) ! cuttime += DAYSPERNYEAR + isleap(y); ! cuttime *= SECSPERHOUR * HOURSPERDAY; ! } (void) time(&now); longest = 0; for (i = optind; i < argc; ++i) *************** *** 231,243 **** struct tm * oldp; { long result; ! result = newp->tm_hour - oldp->tm_hour; ! if (result < 0) ! result += HOURSPERDAY; ! result *= SECSPERHOUR; ! result += (newp->tm_min - oldp->tm_min) * SECSPERMIN; ! return result + newp->tm_sec - oldp->tm_sec; } static void --- 245,265 ---- struct tm * oldp; { long result; + int tmy; ! if (newp->tm_year < oldp->tm_year) ! return -delta(oldp, newp); ! result = 0; ! for (tmy = oldp->tm_year; tmy < newp->tm_year; ++tmy) ! result += DAYSPERNYEAR + isleap(tmy + TM_YEAR_BASE); ! result += newp->tm_yday - oldp->tm_yday; ! result *= HOURSPERDAY; ! result += newp->tm_hour - oldp->tm_hour; ! result *= MINSPERHOUR; ! result += newp->tm_min - oldp->tm_min; ! result *= SECSPERMIN; ! result += newp->tm_sec - oldp->tm_sec; ! return result; } static void

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Kwajalein bug fix
by eggert＠stet.twinsun.com Aug. 26, 1993

Aug. 26, 1993

Kwajalein's missing day uncovered a bug in zdump.c, which missed the 24-hour jump ahead because the jump was masked by the HOURSPERDAY hack in the `delta' function. Here's a patch, plus a proposed new `pacific' file for islands in the Pacific. I've made up the abbreviation `KST'; I don't know what abbreviation Kwajaleinians really use. I don't know when Kwajalein originally started using -12:00 -- it must have been soon after WW II. *** /dev/null Fri Aug 27 07:48:01 1993 --- pacific Fri Aug 27 07:38:41 1993 *************** *** 0 **** --- 1,14 ---- + # @(#)pacific + + + # Kwajalein + + # In comp.risks 14.87 (26 August 1993), Peter Neumann writes: + # I wonder what happened in Kwajalein, where there was NO Friday, + # August 20, 1993. Thursday night at midnight Kwajalein switched sides with + # respect to the International Date Line, to rejoin its fellow islands, + # going from 11:59 p.m. Thursday to 12:00 m. Saturday in a blink. + + # Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL] + Zone Kwajalein -12:00 - KST 1993 Aug 20 + 12:00 - KST =================================================================== RCS file: zdump.c,v retrieving revision 7.3 retrieving revision 7.3.1.1 diff -c -r7.3 -r7.3.1.1 *** zdump.c 1993/01/08 12:00:38 7.3 --- zdump.c 1993/08/26 21:08:10 7.3.1.1 *************** *** 55,60 **** --- 55,64 ---- #define DAYSPERNYEAR 365 #endif /* !defined DAYSPERNYEAR */ + #ifndef TM_YEAR_BASE + #define TM_YEAR_BASE 1900 + #endif + extern char ** environ; extern int getopt(); extern char * optarg; *************** *** 230,243 **** struct tm * newp; struct tm * oldp; { ! long result; ! ! result = newp->tm_hour - oldp->tm_hour; ! if (result < 0) ! result += HOURSPERDAY; ! result *= SECSPERHOUR; ! result += (newp->tm_min - oldp->tm_min) * SECSPERMIN; ! return result + newp->tm_sec - oldp->tm_sec; } static void --- 234,256 ---- struct tm * newp; struct tm * oldp; { ! int newy = newp->tm_year + (TM_YEAR_BASE - 1); ! int oldy = oldp->tm_year + (TM_YEAR_BASE - 1); ! return ! ( ! ( ! ( ! /* difference in day of year */ ! newp->tm_yday - oldp->tm_yday ! /* + intervening leap days */ ! + (newy/4 - oldy/4) ! - (newy/100 - oldy/100) ! + (newy/400 - oldy/400) ! /* + difference in years * 365 */ ! + (long)(newy-oldy) * 365 ! )*24 + (newp->tm_hour - oldp->tm_hour) ! )*60 + (newp->tm_min - oldp->tm_min) ! )*60 + (newp->tm_sec - oldp->tm_sec); } static void

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Item forwarded from comp.protocols.time.ntp
by ado Aug. 26, 1993

Aug. 26, 1993

> From bob(a)kahala.soest.hawaii.edu Mon Aug 23 17:07:53 1993 > Path: nih-csl!darwin.sura.net!howland.reston.ans.net!agate!ames!news.Hawaii.Edu!kahala!bob > From: bob(a)kahala.soest.hawaii.edu (Bob Cunningham) > Newsgroups: comp.protocols.time.ntp > Subject: time trivia, Kwajelein skips a day > Message-ID: <CC8DD5.7It(a)news.Hawaii.Edu> > Date: 23 Aug 93 21:07:53 GMT > Sender: news(a)news.Hawaii.Edu > Organization: School of Ocean and Earth Science and Technology > Lines: 18 > Originator: bob@kahala > > Everyone living on the remote Pacific atoll of Kwajelein in the > Marshall Islands will have a good excuse for not remembering last > Saturdy night. There wasn't one. Residents went to bed on Friday and > woke up on Sunday. There was no 21st of August. The government just > changed Kwajelein to Marshallese time, effectively jumping the island > from one side of the International Date Line to the far side (where it > actually is, the IDL being 300 miles to east of Kwaj). The US Army has > for the last 40 years been synchronizing the day of the week for its > workers on Kwaj with the US mainland. > > But most workers didn't lose a day off. The work week was shifted to > Tuesday through Saturday, corresponding with Monday through Friday on > the mainland. > > -- > Bob Cunningham > bob(a)soest.hawaii.edu > School of Ocean & Earth Science & Technology, University of Hawaii

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Is leap second support working in the latest time zone code?
by eggert＠twinsun.com July 9, 1993

July 9, 1993

With the latest time zone code I tried `zdump -v right/US/Pacific' and got the following output. This looks wrong to me -- the times labeled `GMT' are actually International Atomic Time (TAI), not Coordinated Universal Time (UTC). zdump uses gmtime to print the GMT part. But even with leap second support, gmtime should yield UTC, not TAI, at least according to ANSI C X3.159-1989 section 4.12.3.3. Or am I missing something here? right/US/Pacific Sun Apr 4 10:00:16 1993 GMT = Sun Apr 4 01:59:59 1993 PST isdst=0 right/US/Pacific Sun Apr 4 10:00:17 1993 GMT = Sun Apr 4 03:00:00 1993 PDT isdst=1 right/US/Pacific Thu Jul 1 00:00:17 1993 GMT = Wed Jun 30 16:59:60 1993 PDT isdst=1 right/US/Pacific Thu Jul 1 00:00:18 1993 GMT = Wed Jun 30 17:00:00 1993 PDT isdst=1 right/US/Pacific Sun Oct 31 09:00:17 1993 GMT = Sun Oct 31 01:59:59 1993 PDT isdst=1 right/US/Pacific Sun Oct 31 09:00:18 1993 GMT = Sun Oct 31 01:00:00 1993 PST isdst=0

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Solaris 2.2 has many timezone bugs
by eggert＠shadow.twinsun.com June 22, 1993

June 22, 1993

Solaris 2.2 seems based on a particularly ancient version of the timezone code. It has many bugs that, near as I can tell, were fixed as long ago as 1989 in the public domain version. This is a real step backwards from SunOS 4.1.x. The most serious bug will occur on October 24, 1993 in GB-Eire: Solaris 2.2's switch from summer to winter time will be delayed until October 31. There are some other bugs in Australia, Brazil, Chile, Israel, and Korea zones. I just filed an official bug report with Sun, but I don't have much hope of it having an effect in time. Perhaps someone with some influence at Sun can get them to upgrade to the latest tz code before Solaris 2.3 comes out. Or I could just post a note to comp.risks...

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Julian date conversion code
by jim＠bilbo.suite.com June 19, 1993

June 19, 1993

Does anyone know where I can find some public domain code that converts Julian (and Modified Julian) Dates to "seconds since start of (UNIX/GMT)" and back? thanks, Jim-Miller(a)suite.com

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Re: tz93c botches time zone transitions in Brazil
by ado June 18, 1993

June 18, 1993

Thanks for this new fix. Both it and the new data on Israel are now incorporated in ~ftp/pub/tzcode93d.tar.Z and ~ftp/pub/tzdata93d.tar.Z on elsie.nci.nih.gov (128.231.16.1). (And I think the woes of elsie's transition from being a Sun 3 to being a Sun 4 are over.) --ado

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tz93c botches time zone transitions in Brazil
by eggert＠twinsun.com June 18, 1993

June 18, 1993

Ed Reingold noticed that SunOS 4.1.2 mishandles the time zone transitions in Brazil. Typically, it claims that the transitions occur on Friday, whereas the rule says they should occur on Saturday. The bug is still present in tz93c (the 1993-06-06 version of the time zone code). I looked into the problem, and discovered that zic botches any rule whose ON field is of the form `DAY<=N', where DAY is not Sunday, and where the Nth day of the current year is not DAY. In this case, it acts as if you specified the previous day to DAY. As it happens, the only rules of this form in the database are those of Brazil. For example if you run `zdump -v Brazil/East' you'll see that most of the transitions occur on Friday, but they're all supposed to occur on Saturday. Here is a patch to tz93c. I'm amazed that this bug has never been reported in all these years. Shall we chalk it up to Brazil's strict import restrictions on American software? =================================================================== RCS file: zic.c,v retrieving revision 7.8 retrieving revision 7.8.1.1 diff -c -r7.8 -r7.8.1.1 *** zic.c 1993/06/06 23:31:38 7.8 --- zic.c 1993/06/18 02:58:46 7.8.1.1 *************** *** 1819,1825 **** } else { dayoff = oadd(dayoff, (long) -1); if (--wday < 0) ! wday = LDAYSPERWEEK; --i; } if (i < 0 || i >= len_months[isleap(y)][m]) { --- 1819,1825 ---- } else { dayoff = oadd(dayoff, (long) -1); if (--wday < 0) ! wday = LDAYSPERWEEK - 1; --i; } if (i < 0 || i >= len_months[isleap(y)][m]) {

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