November 2018 - tz - lists.iana.org

proposed time zone package changes (Samoa, Factory, et al.)
by Arthur David Olson Aug. 28, 2019

Aug. 28, 2019

Below find proposed time zone package changes; the executive summary: * Makefile Change LOCALTIME default from "Factory" to "GMT"; do not compile "factory" file (but keep it in the distribution). * Theory Remove reference to "Factory" zone. * australasia Change end of DST in Samoa in 2011 from 2011-04-03 0:00 to 2011-04-03 1:00 (thanks to Raymond Hughes for a reference). * localtime.c Initialize ttinfo structures filled by tzparse (thanks to Ravindra for reporting a valgrind warning). * zic.c Fix generation of POSIX strings for zones with rules using "weekday<=n" forms of dates (thanks to Lei Liu for finding the problem). Also, limit output for non-POSIX-specificable zones defined to follow the same rules every year. (Note that no zones of either of the above types appear in the distribution; these changes cater to add-on zones). If no problems are found, 2010n will appear on 2010-10-25. --ado diff -r -c old/Makefile new/Makefile *** old/Makefile Mon Sep 27 09:24:25 2010 --- new/Makefile Tue Oct 12 12:36:50 2010 *************** *** 1,5 **** # <pre> ! # @(#)Makefile 8.8 # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. --- 1,5 ---- # <pre> ! # @(#)Makefile 8.9 # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. *************** *** 12,18 **** # make zonenames # to get a list of the values you can use for LOCALTIME. ! LOCALTIME= Factory # If you want something other than Eastern United States time as a template # for handling POSIX-style time zone environment variables, --- 12,18 ---- # make zonenames # to get a list of the values you can use for LOCALTIME. ! LOCALTIME= GMT # If you want something other than Eastern United States time as a template # for handling POSIX-style time zone environment variables, *************** *** 262,269 **** DOCS= README Theory $(MANS) date.1 Makefile PRIMARY_YDATA= africa antarctica asia australasia \ europe northamerica southamerica ! YDATA= $(PRIMARY_YDATA) pacificnew etcetera factory backward ! NDATA= systemv SDATA= solar87 solar88 solar89 TDATA= $(YDATA) $(NDATA) $(SDATA) TABDATA= iso3166.tab zone.tab --- 262,269 ---- DOCS= README Theory $(MANS) date.1 Makefile PRIMARY_YDATA= africa antarctica asia australasia \ europe northamerica southamerica ! YDATA= $(PRIMARY_YDATA) pacificnew etcetera backward ! NDATA= systemv factory SDATA= solar87 solar88 solar89 TDATA= $(YDATA) $(NDATA) $(SDATA) TABDATA= iso3166.tab zone.tab diff -r -c old/Theory new/Theory *** old/Theory Mon Sep 27 09:24:25 2010 --- new/Theory Tue Oct 12 12:36:50 2010 *************** *** 1,4 **** ! @(#)Theory 8.4 This file is in the public domain, so clarified as of 2009-05-17 by Arthur David Olson. --- 1,4 ---- ! @(#)Theory 8.5 This file is in the public domain, so clarified as of 2009-05-17 by Arthur David Olson. *************** *** 287,294 **** See the file `backward' for most of these older names (e.g. `US/Eastern' instead of `America/New_York'). The other old-fashioned names still supported are ! `WET', `CET', `MET', `EET' (see the file `europe'), ! and `Factory' (see the file `factory'). ----- Time zone abbreviations ----- --- 287,293 ---- See the file `backward' for most of these older names (e.g. `US/Eastern' instead of `America/New_York'). The other old-fashioned names still supported are ! `WET', `CET', `MET', and `EET' (see the file `europe'). ----- Time zone abbreviations ----- diff -r -c old/australasia new/australasia *** old/australasia Mon Sep 27 09:24:27 2010 --- new/australasia Tue Oct 12 13:14:56 2010 *************** *** 1,5 **** # <pre> ! # @(#)australasia 8.18 # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. --- 1,5 ---- # <pre> ! # @(#)australasia 8.19 # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. *************** *** 487,497 **** # http://www.parliament.gov.ws/documents/acts/Daylight%20Saving%20Act%20%2020… # </a> Zone Pacific/Apia 12:33:04 - LMT 1879 Jul 5 -11:26:56 - LMT 1911 -11:30 - SAMT 1950 # Samoa Time -11:00 - WST 2010 Sep 26 ! -11:00 1:00 WSDT 2011 Apr 3 -11:00 - WST # Solomon Is --- 487,507 ---- # http://www.parliament.gov.ws/documents/acts/Daylight%20Saving%20Act%20%2020… # </a> + # From Raymond Hughes (2010-10-07): + # Please see + # <a href="http://www.mcil.gov.ws"> + # http://www.mcil.gov.ws + # </a>, + # the Ministry of Commerce, Industry and Labour (sideframe) "Last Sunday + # September 2010 (26/09/10) - adjust clocks forward from 12:00 midnight + # to 01:00am and First Sunday April 2011 (03/04/11) - adjust clocks + # backwards from 1:00am to 12:00am" + Zone Pacific/Apia 12:33:04 - LMT 1879 Jul 5 -11:26:56 - LMT 1911 -11:30 - SAMT 1950 # Samoa Time -11:00 - WST 2010 Sep 26 ! -11:00 1:00 WSDT 2011 Apr 3 1:00 -11:00 - WST # Solomon Is diff -r -c old/localtime.c new/localtime.c *** old/localtime.c Mon Sep 27 09:24:26 2010 --- new/localtime.c Tue Oct 12 12:36:51 2010 *************** *** 5,11 **** #ifndef lint #ifndef NOID ! static char elsieid[] = "@(#)localtime.c 8.14"; #endif /* !defined NOID */ #endif /* !defined lint */ --- 5,11 ---- #ifndef lint #ifndef NOID ! static char elsieid[] = "@(#)localtime.c 8.15"; #endif /* !defined NOID */ #endif /* !defined lint */ *************** *** 914,919 **** --- 914,920 ---- register unsigned char * typep; register char * cp; register int load_result; + static struct ttinfo zttinfo; INITIALIZE(dstname); stdname = name; *************** *** 986,991 **** --- 987,993 ---- /* ** Two transitions per year, from EPOCH_YEAR forward. */ + sp->ttis[0] = sp->ttis[1] = zttinfo; sp->ttis[0].tt_gmtoff = -dstoffset; sp->ttis[0].tt_isdst = 1; sp->ttis[0].tt_abbrind = stdlen + 1; *************** *** 1099,1106 **** } /* ** Finally, fill in ttis. - ** ttisstd and ttisgmt need not be handled. */ sp->ttis[0].tt_gmtoff = -stdoffset; sp->ttis[0].tt_isdst = FALSE; sp->ttis[0].tt_abbrind = 0; --- 1101,1108 ---- } /* ** Finally, fill in ttis. */ + sp->ttis[0] = sp->ttis[1] = zttinfo; sp->ttis[0].tt_gmtoff = -stdoffset; sp->ttis[0].tt_isdst = FALSE; sp->ttis[0].tt_abbrind = 0; *************** *** 1113,1118 **** --- 1115,1121 ---- dstlen = 0; sp->typecnt = 1; /* only standard time */ sp->timecnt = 0; + sp->ttis[0] = zttinfo; sp->ttis[0].tt_gmtoff = -stdoffset; sp->ttis[0].tt_isdst = 0; sp->ttis[0].tt_abbrind = 0; diff -r -c old/zic.c new/zic.c *** old/zic.c Mon Sep 27 09:24:26 2010 --- new/zic.c Tue Oct 12 13:37:29 2010 *************** *** 3,9 **** ** 2006-07-17 by Arthur David Olson. */ ! static char elsieid[] = "@(#)zic.c 8.22"; #include "private.h" #include "locale.h" --- 3,9 ---- ** 2006-07-17 by Arthur David Olson. */ ! static char elsieid[] = "@(#)zic.c 8.24"; #include "private.h" #include "locale.h" *************** *** 1881,1896 **** register int week; if (rp->r_dycode == DC_DOWGEQ) { ! week = 1 + rp->r_dayofmonth / DAYSPERWEEK; ! if ((week - 1) * DAYSPERWEEK + 1 != rp->r_dayofmonth) return -1; } else if (rp->r_dycode == DC_DOWLEQ) { if (rp->r_dayofmonth == len_months[1][rp->r_month]) week = 5; else { ! week = 1 + rp->r_dayofmonth / DAYSPERWEEK; ! if (week * DAYSPERWEEK - 1 != rp->r_dayofmonth) return -1; } } else return -1; /* "cannot happen" */ (void) sprintf(result, "M%d.%d.%d", --- 1881,1896 ---- register int week; if (rp->r_dycode == DC_DOWGEQ) { ! if ((rp->r_dayofmonth % DAYSPERWEEK) != 1) return -1; + week = 1 + rp->r_dayofmonth / DAYSPERWEEK; } else if (rp->r_dycode == DC_DOWLEQ) { if (rp->r_dayofmonth == len_months[1][rp->r_month]) week = 5; else { ! if ((rp->r_dayofmonth % DAYSPERWEEK) != 0) return -1; + week = rp->r_dayofmonth / DAYSPERWEEK; } } else return -1; /* "cannot happen" */ (void) sprintf(result, "M%d.%d.%d", *************** *** 2018,2023 **** --- 2018,2024 ---- register char * envvar; register int max_abbr_len; register int max_envvar_len; + register int prodstic; /* all rules are min to max */ max_abbr_len = 2 + max_format_len + max_abbrvar_len; max_envvar_len = 2 * max_abbr_len + 5 * 9; *************** *** 2032,2037 **** --- 2033,2039 ---- timecnt = 0; typecnt = 0; charcnt = 0; + prodstic = zonecount == 1; /* ** Thanks to Earl Chew ** for noting the need to unconditionally initialize startttisstd. *************** *** 2053,2058 **** --- 2055,2062 ---- updateminmax(rp->r_loyear); if (rp->r_hiwasnum) updateminmax(rp->r_hiyear); + if (rp->r_lowasnum || rp->r_hiwasnum) + prodstic = FALSE; } } /* *************** *** 2075,2080 **** --- 2079,2094 ---- if (max_year <= INT_MAX - YEARSPERREPEAT) max_year += YEARSPERREPEAT; else max_year = INT_MAX; + /* + ** Regardless of any of the above, + ** for a "proDSTic" zone which specifies that its rules + ** always have and always will be in effect, + ** we only need one cycle to define the zone. + */ + if (prodstic) { + min_year = 1900; + max_year = min_year + YEARSPERREPEAT; + } } /* ** For the benefit of older systems,

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Big tech warns of 'Japan's millennium bug' ahead of Akihito's abdication
by Martin Burnicki April 30, 2019

April 30, 2019

Don't know if this has already been known, or if it's really relevant for this list, but ... "Big tech warns of 'Japan's millennium bug' ahead of Akihito's abdication" https://www.theguardian.com/technology/2018/jul/25/big-tech-warns-japan-mil… Martin -- Martin Burnicki Senior Software Engineer MEINBERG Funkuhren GmbH & Co. KG Email: martin.burnicki(a)meinberg.de Phone: +49 5281 9309-414 Linkedin: https://www.linkedin.com/in/martinburnicki/ Lange Wand 9, 31812 Bad Pyrmont, Germany Amtsgericht Hannover 17HRA 100322 Geschäftsführer/Managing Directors: Günter Meinberg, Werner Meinberg, Andre Hartmann, Heiko Gerstung Websites: https://www.meinberg.de https://www.meinbergglobal.com Training: https://www.meinberg.academy

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Brazilian state of Goiás may abolish DST
by World Time Zone April 26, 2019

April 26, 2019

According to some news Brazilian state of Goiás may abolish DST: "The Energy and Mines Commission of the House of Representatives approved a Legislative Decree that suspends daylight saving time in Goiás." http://www.infomoney.com.br/minhas-financas/consumo/noticia/7061178/comissa… Also, ".... this year the federal government even considered not implementing daylight saving time, but left the decision to 2018." Alexander Krivenyshev https://www.WorldTimeZone.com

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Metlakatla
by TechOps Jan. 22, 2019

Jan. 22, 2019

Hello. The Metlakatla community in Alaska has decided not to change its clock back an hour starting on November 4th, 2018 (day before yesterday). They will be gmtoff=-28800 year-round. I'm told this is the list to send this information to. Any assistance or advice on getting this updated in the database is appreciated. https://www.facebook.com/141055983004923/photos/pb.141055983004923.-2207520… [image: MIC time change.jpg] - Ryan _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ AKTechOps <http://serrc.org/techops> | techops(a)serrc.org | *(907) 523-7290* *| Brian 523-7248 | Michaela 523-7258 | Nate 523-7275 | Nick 523-7291 | Ryan 523-7272 | SERRC 586-6806 |*

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posix for asia/tehran is wrong
by Mark Nov. 30, 2018

Nov. 30, 2018

I've been adding DST time zone to espurna (https://github.com/xoseperez/espurna/pull/1295) All dst entries but asia/tehran, use Mm.n.d format to specify dst dates. The Tehran use 'Jn': "Asia/Tehran","<+0330>-3:30<+0430>,J80/0,J264/0" When I implement this 'J' format, I came out a day short. From https://en.wikipedia.org/wiki/Iran_Standard_Time: The Iranian DST starts on March 22 and ends on September 22 each year with the exception of leapyears in which the DST starts and ends one day prior. Year DST Start Date and Time DST End Date and Time *2014* Sat, Mar 22, 0:00 AM Mon, Sep 22, 0:00 AM *2015* Sun, Mar 22, 0:00 AM Tue, Sep 22, 0:00 AM *2016* Mon, Mar 21, 0:00 AM Wed, Sep 21, 0:00 AM *2017* Wed, Mar 22, 0:00 AM Fri, Sep 22, 0:00 AM *2018* Thu, Mar 22, 0:00 AM Sat, Sep 22, 0:00 AM This mean Tehran should be "Asia/Tehran","<+0330>-3:30<+0430>,80/0,264/0". The 'n' format, which counts 29 Feb, and starts count from 0, so would not come up a day short on non-leap years.

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[PROPOSED] * northamerica: Herbert Copeland stops time.
by Paul Eggert Nov. 30, 2018

Nov. 30, 2018

--- northamerica | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/northamerica b/northamerica index e590a30..17597e2 100644 --- a/northamerica +++ b/northamerica @@ -792,6 +792,22 @@ Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 # For a map of Indiana's time zone regions, see: # https://en.wikipedia.org/wiki/Time_in_Indiana # +# From Paul Eggert (2018-11-30): +# A brief but entertaining history of time in Indiana describes a 1949 debate +# in the Indiana House where city legislators (who favored "fast time") +# tussled with farm legislators (who didn't) over a bill to outlaw DST: +# "Lacking enough votes, the city faction tries to filibuster until time runs +# out on the session at midnight, but rural champion Rep. Herbert Copeland, +# R-Madison, leans over the gallery railing and forces the official clock +# back to 9 p.m., breaking it in the process. The clock sticks on 9 as the +# debate rages on into the night. The filibuster finally dies out and the +# bill passes, while outside the chamber, clocks read 3:30 a.m. In the end, +# it doesn't matter which side won. The law has no enforcement powers and +# is simply ignored by fast-time communities." +# How Indiana went from 'God's time' to split zones and daylight-saving. +# Indianapolis Star. 2018-11-27 14:58 -05. +# https://www.indystar.com/story/news/politics/2018/11/27/indianapolis-indian… +# # From Paul Eggert (2007-08-17): # Since 1970, most of Indiana has been like America/Indiana/Indianapolis, # with the following exceptions: -- 2.17.1

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Timezone history for some Pacific Islands.
by Phake Nick Nov. 30, 2018

Nov. 30, 2018

>From a Japanese wiki site https://wiki.suikawiki.org/n/南洋群島の標準時 there are some time change history about Pacific Islands that are not included in the tz database. Mainly, the history of time used in those islands during, before and after Japanese administration, and also DST used in Guam during 1960s and 1970s. For "Southern Islands" (modern region of Mariana + Palau + Federation of Micronesia + Marshall Islands): * A 1906 Japanese magazine shown the Caroline Islands and Mariana Islands who was occupied by Germany at the time as GMT+10, together with the like of German New Guinea. However there is a marking saying it have not been implemented (yet). No further information after that were found. * Japan invaded those islands in 1914, and records shows that they were instructed to use JST at the time * 1915 January telecommunication record on the Jaluit Atoll shows they use the meridian of 170E as standard time (GMT+11:20), which is similar to the longitude of the atoll. * 1915 February record say the 170E standard time is to be used until February 9 noon, and after February 9 noon they are to use JST. * However these are time used within the Japanese Military at the time and probably does not reflect the time used by local resident at the time (that is if they keep their own time back then) * In January 1919 the occupying force issued a command that split the area into three different timezone with meridian of 135E, 150E, 165E (JST+0, +1, +2), and the command was to become effective from February 1 of the same year. Despite the target of the command is still only for the occupying force itself, further publication have described the time as the standard time for the occupied area and thus it can probably be seen as such. ** Area that use meridian of 135E: Palau and Yap civil administration area (Southern Islands Western Standard Time) ** Area that use meridian of 150E: Truk(Chuuk) and Saipan civil administration area (Southern Islands Central Standard Time) ** Area that use meridian of 165E: Ponape(Pohnpei) and Jaluit civil administration area. (Southern Islands Eastern Standard Time) ** In the next few years Japanese occupation of those islands have been formalized via League of Nation Mandate (South Pacific Mandate) and formal governance structure have been established, these district [become subprefectures] and timezone classification have been inherited as standard time of the area. ** Saipan subprefecture include Mariana islands (exclude Guam which was occupied by America at the time), Palau and Yap subprefecture rule the Western Caroline Islands with 137E longitude as border, Truk and Ponape subprefecture rule the Eastern Caroline Islands with 154E as border, Ponape subprefecture also rule part of Marshall Islands to the west of 164E starting from (1918?) and Jalnuit subprefecture rule the rest of the Marshall Islands. * And then in year 1937, an announcement was made to change the time in the area into 2 timezones: ** Area that use meridian of 135E: area administered by Palau, Yap and Saipan subprefecture (Southern Islands Western Standard Time) ** Area that use meridian of 150E: area administered by Truk(Chuuk), Ponape(Pohnpei) and Jaluit subprefecture (Southern Islands Eastern Standard Time) * Another announcement issued in 1941 say that on April 1 that year, standard time of the Southern Islands would be changed to use the meridian of 135E (GMT+9), and thus abolishing timezone different within the area. * Then Pacific theater of WWII started and Japan slowly lose control on the island. The webpage I linked above contain no information during this period of time. Guam Island was briefly annexed by Japan during this period of time [year 1941-1944], however there are no detailed information about what time it use during that period. It would probably be reasonable to assume Guam use GMT+9 during that period of time like the surrounding area. * After the end of WWII, in 1946 February, a document written by the (former?) Japanese military personnel describe there are 3 hours time different between Caroline islands time/Wake island time and the Chungking time, which would mean the time being used there at the time was GMT+10. * After that, the area become Trust Territories of the Pacific Islands under American administration from year 1947. The site listed some American/International books/maps/publications about time used in those area during this period of time but they doesn't seems to be reliable information so it would be the best if someone know where can more reliable information can be found. * The site also pointed out that currently tzdata say Pacific/Kwajalein switched from GMT+11 to GMT-12 in 1969 October without explanation, however an 1993 article from NYT say it synchorized its day with US mainland about 40 years ago and thus the switch should occur at around 1950s instead. * Also, the NYT article linked in that website say the jump from GMT-12 to GMT+12 in year 1993 skipped Saturday that day, however the comment in tz database from that year say it skipped Friday. That seems to be an inconsistency that should be investigated, and the comment should probably be annotated accordingly if the comment was not accurate ANd then additional note for Bonin Islands: While not part of the Southern Islands, in the period of time during 1952-1968, Bonin Islands were placed under American administration. It would probably be worth investigating whether they're following the Japanese time or the Mariana time or some other time standard at the time. And then for Guam: * Currently tz database say Guam stopped using local mean time at 1901 but a 1902 earthquake report on Guam seems to be using LMT in the report when compares to the time the earthquake recorded on the Philippines (the site note that it take times for earthquake wave to transmit and thus the time different between records in different place would not be identical to the time different) ** The site say Shanks used 1901 end date for LMT time for a number of places around the world, probably using them as placeholder. Maybe those 1901 end date should be nuked from tz database? * A Japanese magazine in 1906 say Guam's time is "1.5 hours earlier than Japan" and "use 145 degree E meridian" which are contradictory to each other as 145E meridian mean GMT+9:40 and that is not 1.5 hours earlier than Japan. * And then there are some different records about Guam used GMT+9:30 at the time but each of those documents seems to give different transition time for when they give up :30 time different and move to GMT+10. But it most likely occurred before 1927 as a map published by US Navy that year shows Guam as using GMT+10, which appears to be credible as Guam was under US Military administration at the time. * As mentioned above, Guam was invaded by Japan during year 1941-1944. It's unclear about did they shifted the clock to match the surrounding islands during this period of time. * Then in year 1959 there's a daylight saving time act passed for Guam. There is a table on the site that include list an link to time and order for implementation and cancellation of DST at Guam but the implementation time seems to be all over the place according to the list. The last time the DST was implemented in Guam according to the table seems to be 1977 although I am not sure about the completeness of the table. If so then maybe a new zone for CNI would need to be created as it's after 1970 and the DST should be applicable to Guam only?

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Question about the UNTIL fields
by Marcos Passos Nov. 29, 2018

Nov. 29, 2018

Hello everyone, I'm working on a TZDB parser for a PHP project and reading the zic8.txt I came across with the following information: The month, day, and time of day have the same format as the IN, ON, and AT > fields of a rule However, I could not find any Zone line in the latest version of the TZDB containing relative dates, such as "lastSun" or "sun>=5", but only absolute dates. Is this a mistake in the documentation or are relative dates actually supported on those lines but have never been used? - Marcos

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Stop
by The OneCloud Nov. 29, 2018

Nov. 29, 2018

Stop

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query regarding issue will updating open JDK timezone info with tzdata2018g
by Dhanusha, Pb (Nokia - IN/Bangalore) Nov. 26, 2018

Nov. 26, 2018

Hi, We are facing issues while updating open JDK timezone with tzdata2018g with the below error. #/usr/bin/java -jar /root/tzupdater.jar -l file:/root/tzdata2018g.tar.gz Failed: java.lang.Exception: Failed while parsing file '/tmp/tz.tmp/asia' on line 1655 'Rule Japan 1948 1951 - Sep Sat>=8 25:00 0 S' java.lang.Exception: Failed while parsing file '/tmp/tz.tmp/asia' on line 1655 'Rule Japan 1948 1951 - Sep Sat>=8 25:00 0 S' at tools.tzdb.TzdbZoneRulesCompiler.parseFile(TzdbZoneRulesCompiler.java:377) at tools.tzdb.TzdbZoneRulesCompiler.compile(TzdbZoneRulesCompiler.java:191) at tools.tzdb.TzdbZoneRulesCompiler.<init>(TzdbZoneRulesCompiler.java:307) at com.sun.tools.tzupdater.ExternalModule.compileToJSRBinary(ExternalModule.java:212) at com.sun.tools.tzupdater.TimezoneUpdater.run(TimezoneUpdater.java:226) at com.sun.tools.tzupdater.TimezoneUpdater.main(TimezoneUpdater.java:780) Caused by: tools.tzdb.DateTimeException: Invalid value for SecondOfDay value: 90000 at tools.tzdb.ChronoField.checkValidValue(ChronoField.java:173) at tools.tzdb.LocalTime.ofSecondOfDay(LocalTime.java:210) at tools.tzdb.TzdbZoneRulesCompiler.parseMonthDayTime(TzdbZoneRulesCompiler.java:475) at tools.tzdb.TzdbZoneRulesCompiler.parseRuleLine(TzdbZoneRulesCompiler.java:399) at tools.tzdb.TzdbZoneRulesCompiler.parseFile(TzdbZoneRulesCompiler.java:354) ... 5 more Could you please help us with this. Regards, Dhanusha

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