July 2011 - 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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proposed tz change for Latvia, Lithuania
by Paul Eggert May 25, 2015

May 25, 2015

It's March Madness time for daylight-saving rule changes. Here's a proposed change to the tz database to keep up with the latest political development, which affects time stamps starting March 29: * Latvia and Lithuania will not observe DST, starting this year. Thanks to Andrei Ivanov for this info. =================================================================== RCS file: RCS/europe,v retrieving revision 2000.3 retrieving revision 2000.3.0.1 diff -pu -r2000.3 -r2000.3.0.1 --- europe 2000/03/04 15:31:08 2000.3 +++ europe 2000/03/08 17:48:59 2000.3.0.1 @@ -1135,6 +1135,12 @@ Link Europe/Rome Europe/San_Marino # 1997-01-21 on transition to Summer time ... established the same order of # daylight savings time settings as in the States of the European Union. +# From Andrei Ivanov (2000-03-06): +# This year Latvia will not switch to Daylight Savings Time (as specified in +# <a href="http://www.lv-laiks.lv/wwwraksti/2000/071072/vd4.htm"> +# The Regulations of the Cabinet of Ministers of the Rep. of Latvia of +# 29-Feb-2000 (#79)</a>, in Latvian for subscribers only). + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Latvia 1989 1996 - Mar lastSun 2:00s 1:00 S Rule Latvia 1989 1996 - Sep lastSun 2:00s 0 - @@ -1151,7 +1157,8 @@ Zone Europe/Riga 1:36:24 - LMT 1880 3:00 Russia MSK/MSD 1989 Mar lastSun 2:00s 2:00 1:00 EEST 1989 Sep lastSun 2:00s 2:00 Latvia EE%sT 1997 Jan 21 - 2:00 EU EE%sT + 2:00 EU EE%sT 2000 Feb 29 + 2:00 - EET # Liechtenstein # Zone NAME GMTOFF RULES FORMAT [UNTIL] @@ -1178,6 +1185,11 @@ Zone Europe/Vaduz 0:38:04 - LMT 1894 Jun # motion to give up shifting to summer time in spring, as it was # already done by Estonia. +# From Andrei Ivanov (2000-03-06): +# I've heard that Ministers of three Baltic countries on their summit +# somewhere in February decided not to switch to summer time starting from +# this spring. + # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Europe/Vilnius 1:41:16 - LMT 1880 1:24:00 - WMT 1917 # Warsaw Mean Time @@ -1192,7 +1204,8 @@ Zone Europe/Vilnius 1:41:16 - LMT 1880 2:00 C-Eur EE%sT 1998 2:00 - EET 1998 Mar 29 1:00u 1:00 EU CE%sT 1999 Oct 31 1:00u - 2:00 EU EE%sT + 2:00 EU EE%sT 2000 Feb + 2:00 - EET # Luxembourg # Whitman disagrees with most of these dates in minor ways; go with Shanks.

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Hong Kong problem and BCN timezone(s)
by Jesper Nørgaard Sept. 20, 2011

Sept. 20, 2011

I have found a small problem in the Hong Kong corrections of 2009q. It seems that the Hong Kong government page says that DST was not used in 1977 and 1978, while this is the current tz data: Rule HK 1965 1977 - Apr Sun>=16 3:30 1:00 S Rule HK 1965 1977 - Oct Sun>=16 3:30 0 - Indeed the whole extract of the government web page is still part of the asia file. I would suggest it should be like this Rule HK 1965 1976 - Apr Sun>=16 3:30 1:00 S Rule HK 1965 1976 - Oct Sun>=16 3:30 0 - My other question concerns the timezone America/Santa_Isabel. It seems that several sources imply that all of Baca California Norte is on the same timezone http://www.frontera.info/EdicionEnlinea/Notas/Noticias/13032010/435414.aspx http://www.notisistema.com/noticias/?p=251578 http://www.timeanddate.com/news/time/north-mexico-dst-change.html This is far from authoritative, but at least and indication that BCN might be one single timezone. I wonder if there has been any confirmation of the Santa Isabel timezone in BCN? I am not saying it is not there, I just haven't found any confirmation of it. - Jesper Norgaard Welen

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US Mountain/Central border at Fort Pierre SD
by Steve Jones Sept. 12, 2011

Sept. 12, 2011

If I might seek the wisdom of the list on a minor topic: The current Mountain/Central boundary in the most recent official US DOT description (49CFR71.7, http://goo.gl/tqBou) has the border running right through Fort Pierre South Dakota. Here is the relevant text: > From the junction of the North Dakota-South Dakota boundary with > the Missouri River southerly along the main channel of that river > to the crossing of the original Chicago & North Western Railway > near Pierre; thence southwesterly to the northern boundary of Jones > County at the northeast corner of the NE 1, Sec. 6, T. 2 N., R. 30 > E. [note: that's about 44.18635, -100.54646) That makes a straight line from the railroad bridge north of town to 44.18635, -100.54646, this line not making much sense in the context of what's on the ground. A second-hand recent conversation with a Stanley County SD official was relayed to me, including the following: >...The person with whom I spoke said the official dividing line is >the Bad River, which makes more >sense than bisecting Fort Pierre. ... The communities along the >Bad River are so tiny (several houses each) that they don't have >official policies. The person with whom I spoke assumed they would >use Central Time because aside from Fort Pierre, there's no >significant populated place that's even close. There are several common sense border adjustments I could make here and probably be more accurate than the DOT (with regards to what a traveler would encounter in the area). Something like a line from the southern end of the dam at Lake Oahe southward to the Bad River, then following the Bad River soutwesterly to the northern border of Jones County... (and from that point rejoining the DOT description). I would prefer to use some authoritative reference - if possible. Any advice on how to proceed? All I can think of is to try a reference librarian in Pierre. Cheers, Steve Jones

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Shouldn't Kemerovo oblast' use OMST/OMSST timezone abbreviation?
by Petr Machata Aug. 29, 2011

Aug. 29, 2011

... given the time offset it could be either that, or NOVT that tzdata currently have. But Wikipedia lists Kemerovo under Omsk Time: http://en.wikipedia.org/wiki/Kemerovo_Oblast http://en.wikipedia.org/wiki/Omsk_Time In Russian: http://ru.wikipedia.org/wiki/%D0%9D%D0%BE%D0%B2%D0%BE%D0%BA%D1%83%D0%B7%D0%… http://www.lenta.ru/news/2009/09/23/belt/ Thanks, Petr Machata

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corrected DST data Switzerland 1941 and 1942, final report
by Alois Treindl Aug. 25, 2011

Aug. 25, 2011

Hello I have researched the DST usage in Switzerland during the 1940ies. As I wrote in an earlier message, I suspected the current tzdata values to be wrong. This is now verified. I have found copies of the original ruling by the Swiss Federal government, in 'Eidgenössische Gesetzessammlung 1941 and 1942' (Swiss federal law collection) and attach GIF copies of the two pages for 1941. DST began on Monday 5 May 1941, 1:00 am by shifting the clocks to 2:00 am DST ended on Monday 6 Oct 1941, 2:00 am by shifting the clocks to 1:00 am. DST began on Monday, 4 May 1942 at 01:00 am DST ended on Monday, 5 Oct 1942 at 02:00 am There was no DST in 1940, I have checked the law collection carefully. It is also indicated by the fact that the 1942 entry in the law collection points back to 1941 as a reference, but no reference to any other years are made. Newspaper articles I have read in the archives on 6 May 1941 reported about the introduction of DST (Sommerzeit in German) during the previous night as an absolute novelty, because this was the first time that such a thing had happened in Switzerland. I have also checked 1916, because one book source (Gabriel, Traite de l'heure dans le monde) claims that Switzerland had DST in 1916. This is false, no official document could be found. Probably Gabriel got misled by references to Germany, which introduced DST in 1916 for the first time. The tzdata rules for Switzerland must be changed to: Rule Swiss 1941 1942 - May Mon>=1 1:00 1:00 S Rule Swiss 1941 1942 - Oct Mon>=1 2:00 0 - The 1940 rules must be deleted. One further detail for Switzerland, which is probably out of scope for most users of tzdata: The zone file Zone Europe/Zurich 0:34:08 - LMT 1848 Sep 12 0:29:44 - BMT 1894 Jun #Bern Mean Time 1:00 Swiss CE%sT 1981 1:00 EU CE%sT describes all of Switzerland correctly, with the exception of the Cantone Geneve (Geneva, Genf). Between 1848 and 1894 Geneve did not follow Bern Mean Time but kept its own local mean time. To represent this, an extra zone would be needed. Two GIF files are attached. best regards Alois -- || Alois Treindl, Astrodienst AG, mailto:alois@astro.com || Zollikon/Zurich, Switzerland || Free astrological charts at http://www.astro.com/ || SWISS EPHEMERIS Free Edition at http://www.astro.com/swisseph/

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Re: China time zone
by An Yang Aug. 18, 2011

Aug. 18, 2011

Dear Arthur, Thanks a lot. At first, let me show you some data: Population of Beijing in 2011 is 22,634,722, data from http://www.trueknowledge.com/q/population_of_beijing_in_2011 And population of Shanghai in 2011 is 22,447,529, data from http://www.trueknowledge.com/q/population_of_shanghai_in_2011 And of cause, you can check the population of Beijing and Shanghai in 1996, Beijing is 2,069,722, and Shanghai is 1,188,721. If your data source is http://www.world-gazetteer.com/wg.php?x=1263073253&men=gcis&lng=en&des=game… and http://www.citypopulation.de/world/Agglomerations.html What I can say, the data is wrong absolutely. The following is the data from the China Gov (Chinese only): http://www.shanghai.gov.cn/shanghai/node2314/node2319/node12344/u26ai25463.… http://www.bjstats.gov.cn/rkpc_6/pcsj/201105/t20110506_201580.htm All of these data is different, what should we trust? Let me try to explain it, frankly say, it's difficult to count the exact population of a city which have more than 20,000,000, especially in China. The population data from government, it just include the people who have the locale ID ( hukou ), do not include people without locale ID (hukou). So maybe 20-30% people lost, I think the data from http://www.trueknowledge.com is more accurate, which reflect the real number of people who live in the city. My conclusion is both Beijing and Shanghai are big city in China, and have almost the similar populations. According to the rule: Among locations with similar populations, pick the best-known location, e.g. prefer `Rome' to `Milan'. I think the best-known location is Beijing, no matter from Chinese view or from the foreigner's view. I have read all the messages about Beijing Time in ftp://elsie.nci.nih.gov/pub/tzarchive.gz, and notice that all the voice from China is the same, Beijing should represent China. So trust the people who live there and use Beijing time everyday maybe the best choice. Bests, An Yang 在 2011-06-29三的 06:30 -0400，Arthur Olson写道： > I've added you to the time zone mailing list. > > You may want to check out the old mailing list archives in... > ftp://elsie.nci.nih.gov/pub/tzarchive.gz > ...for past discussions of the Shanghai/Beijing matter (it does come > up every few years). > > --ado

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Samoa to move timezone from east to west of international date line
by David Zülke Aug. 17, 2011

Aug. 17, 2011

http://www.morningstar.co.uk/uk/markets/newsfeeditem.aspx?id=138501958347963 David

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tzdata2011h
by Arthur Olson Aug. 11, 2011

Aug. 11, 2011

The file... ftp://elsie.nci.nih.gov/pub/tzdata2011h.tar.gz ...is now available; this reflects the Russia and Curacao changes circulated recently on the time zone mailing list. --ado

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America/Resolute
by Chris Walton Aug. 6, 2011

Aug. 6, 2011

Back in 2007 I initiated the creation of a new "zone file" for Resolute Bay. Resolute Bay is a small community located about 900km north of the Arctic Circle. The zone file was required because Resolute Bay had decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007. http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html According to new information which I received last week, Resolute Bay went back to using UTC-6 in the winter of 2007-2008. This new information conflicts with information I received in November 2008. Assuming the new information is correct, a change is required for "America/Resolute" Details are below. Sorry this post is so long. #---------------------------------------------------------- On March 11/2007 most of Canada went onto daylight saving. On March 14/2007 I phoned the Resolute Bay hamlet office to do a "time check". I talked to somebody that was both knowledgeable and helpful. I was able to confirm that Resolute Bay was still operating on UTC-5. It was explained to me that Resolute Bay had been on the Eastern Time zone (EST) in the winter, and was now back on the Central Time zone (CDT). i.e. the time zone had changed twice in the last year but the clocks had not moved. The residents had to know which time zone they were in so they could follow the correct TV schedule. #---------------------------------------------------------- I did not contact anybody in Resolute Bay for the next year and a half. #---------------------------------------------------------- On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I phoned the Resolute Bay hamlet office. I talked to a woman who had difficulty understanding anything I asked. She managed to tell me that Resolute Bay had changed to "Eastern Time" the day before. I don't recall any elaboration on what this meant. That was all I got out of the call. I don't remember whether or not I tried to do a "time check". I was left with the impression that Resolute Bay was still stuck on UTC-5 (EST in winter and CDT in summer). However, due to the challenging nature of the phone call, I decided to seek out an alternate source of information. I found an e-mail address for somebody by the name of Stephanie Adams whose job was listed as "Inns North Support Officer for Arctic Co-operatives". I was under the impression that Stephanie lived and worked in Resolute Bay. Note: I don't think this was same Stephanie Adams that appeared in the center of a well known U.S. based magazine. I sent an e-mail to Stephanie on Nov 03/2008. Stephanie forwarded my e-mail to somebody by the name of Silvano Cendou; I have no information on who Silvano is. On Nov 05/2008, Silvano responded with this: 'Hi Stephanie Resolute Bay did not turn their clocks back on Sunday! They kept the same time as they had proir to the change. Hope this helps you Silvano' Stephanie forwarded Silvano's e-mail back to me. The phone calls and the e-mails all pointed to the permanent use of UTC-5 with a "time zone change" twice a year. On Nov 13/2008 I sent a post to this mailing list; I stated that Resolute Bay was still using Eastern Standard Time in winter and Central Daylight Time in summer. #---------------------------------------------------------- I did not contact anybody in Resolute Bay for the next two and a half years. #---------------------------------------------------------- On March 14/2011 I phoned the hamlet office again. I was told that Resolute Bay had been using Central Standard Time over the winter of 2010-2011 and that the clocks had therefore been moved one hour ahead on March 13/2011. The person I talked to was aware that Resolute Bay had previously experimented with Eastern Standard Time but he could not tell me when the practice had stopped. #---------------------------------------------------------- On March 17/2011 I searched the Web to find an e-mail address of somebody that might be able to tell me exactly when Resolute Bay went off Eastern Standard Time. I stumbled on the name "Aziz Kheraj". Aziz used to be the mayor of Resolute Bay and he apparently owns half the businesses including "South Camp Inn". This website has some info on Aziz: http://www.uphere.ca/node/493 I sent Aziz an e-mail asking when Resolute Bay had stopped using Eastern Standard Time. Aziz responded quickly with this: 'hi, The time was not changed for the 1 year only, the following year, the community went back to the old way of " spring ahead-fall behind" currently we are zulu plus 5 hrs and in the winter Zulu plus 6 hrs' This of course conflicted with everything I had ascertained in November 2008. I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz responded with this: 'Hi, Stephanie lives in Winnipeg. I live here, You may want to check with the weather office in Resolute Bay or do a search on the weather through Env. Canada. web site' #-------------------------------------------------------------- If I had realized the Stephanie did not live in Resolute Bay I would never have contacted her. I now believe that all the information I obtained in November 2008 should be ignored. Assuming Aziz is correct, America/Resolute needs some changes. I think it would be best to delete the "Resolute" rule, and then change "America/Resolute" to look like this: Zone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded -6:00 NT_YK C%sT 2000 Oct 29 2:00 -5:00 - EST 2001 Apr 1 3:00 -6:00 Canada C%sT 2006 Oct 29 2:00 -5:00 - EST 2007 Mar 11 3:00 -6:00 Canada C%sT The comments in zone.tab should be reverted back to: "Central Time - Resolute, Nunavut" I apologize for reporting incorrect information in 2008. -chris

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Re: OnTimeZone site update
by Zoidiasoft Tech July 22, 2011

July 22, 2011

> Along those lines, thanks to Curtis Manwaring from this list for > alerting me to the observed time zone anomaly for the Vidal > California area... Thanks. The question I have is how did the cell phone company (Verizon) know what time it was in Vidal, CA? There are what look to be 2 cell phone towers, one at Vidal Junction behind the only gas station (and California produce checkpoint) and another just over a mile south of the junction between rte 62 and 95. The time changes from Arizona (Mountain) to Pacific when traveling north of Vidal toward the junction. They must have a database somewhere and it would be nice to get a copy of that for the Olson database. Hopefully they've kept records going back several years. Sincerely, Curtis Manwaring

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New site with North American Time Zone borders
by Steve Jones July 21, 2011

July 21, 2011

Apologies if this is not of interest here. I'm new, recently joining to keep up on changes in order to keep a website with time zone data up to date. There is likely nothing here that will be news to anybody, but you may find it interesting: http://ontimezone.com I will be grateful for any feedback about the data, especially corrections! Cheers, Steve Jones

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ITU-R redefinition, UTC as a timezone?
by Steve Allen July 12, 2011

July 12, 2011

This list has mentioned that in 2012 January the Radiocommunications Assembly (RA) will probably vote on a revision of ITU-R TF.460, the document which defines the time scale used in radio broadcasts, and thus also in internet time services. For more details on the decade-long history of that effort see my web page http://www.ucolick.org/~sla/leapsecs/onlinebib.html As currently worded the draft revision would abandon leap seconds in the UTC time scale. Adoption of the draft revision requires a 70% supermajority vote of the delegates. In 1970 (the previous instance of significant change to broadcast time signals) the wording of the draft was modified during the assembly. I would like feedback from the members of the tz mail list on the pros and cons of the applicability of a possible modification of the broadcast time signals which preserves the traditional meaning of time-of-day while removing the leap seconds from the broadcasts. The modification uses the existing zoneinfo database and code. I have a description and test example of the modification here http://www.ucolick.org/~sla/leapsecs/right+gps.html This is aimed as an implementation which can be tested now. If the ITU-R were to rename the broadcast time scale at the same time as abandoning leap seconds then it might also serve posterity. -- Steve Allen <sla(a)ucolick.org> WGS-84 (GPS) UCO/Lick Observatory--ISB Natural Sciences II, Room 165 Lat +36.99855 1156 High Street Voice: +1 831 459 3046 Lng -122.06015 Santa Cruz, CA 95064 http://www.ucolick.org/~sla/ Hgt +250 m

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IERS Message No. 192: Questionnaire to survey opinion concerning a redefinition of UTC
by central_bureau＠iers.org July 12, 2011

July 12, 2011

************************************************************************ IERS Message No. 192 July 12, 2011 ************************************************************************ Questionnaire to survey opinion concerning a redefinition of UTC After years of discussions, a proposal to fundamentally redefine UTC will come to a conclusive vote in January 2012 at the ITU-R in Geneva. This proposal would halt the intercalary adjustments known as leap seconds that maintain UTC as a form of Universal Time. If the proposal is approved, UTC would not keep pace with Earth rotation and the value of DUT1 would become unconstrained. Therefore UTC would no longer be directly useful for various technical applications which rely on it being less than 1 second from UT1. Such applications would require a separate access to UT1, such as through the publication of DUT1 by other means. The objective of the survey is to find out the strength of opinion for maintaining or changing the present system. Link to the questionnaire: http://hpiers.obspm.fr/eop-pc/index.php?index=questionnaire Your response is appreciated before 31 August 2011. Daniel Gambis Earth Orientation Center of the IERS ************************************************************************ IERS Messages are edited and distributed by the IERS Central Bureau. To submit texts for distribution and to subscribe or unsubscribe, please write to <central_bureau(a)iers.org>. Archives: http://www.iers.org/Messages/ ************************************************************************

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Re: DST in Fiji
by Petr Machata July 8, 2011

July 8, 2011

Hi there, I'm wondering if anyone knows whether Fiji should enter the period of DST in 2011 again, and when that should be. Timeanddate.com seem to expect it starts at years to come. But the only reference I was able to find is this one: http://www.fiji.gov.fj/index.php?option=com_content&view=article&id=2608:da… And that seems only related to the DST period that occured in 2010/2011. In particular, in the following line: "Daylight Savings will be from October 24 to March 6, 2011" ... I don't think that "October 24" should be understod as October of 2011. (The zoneinfo project doesn't currenty assume the DST will start in 2011 an on.) Thanks, Petr Machata

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Bulletin C number 42
by IERS EOP Product Center July 8, 2011

July 8, 2011

INTERNATIONAL EARTH ROTATION AND REFERENCE SYSTEMS SERVICE (IERS) SERVICE INTERNATIONAL DE LA ROTATION TERRESTRE ET DES SYSTEMES DE REFERENCE SERVICE DE LA ROTATION TERRESTRE OBSERVATOIRE DE PARIS 61, Av. de l'Observatoire 75014 PARIS (France) Tel. : 33 (0) 1 40 51 22 26 FAX : 33 (0) 1 40 51 22 91 Internet : services.iers(a)obspm.fr Paris, 8 July 2011 Bulletin C 42 To authorities responsible for the measurement and distribution of time INFORMATION ON UTC - TAI NO positive leap second will be introduced at the end of December 2011. The difference between Coordinated Universal Time UTC and the International Atomic Time TAI is : from 2009 January 1, 0h UTC, until further notice : UTC-TAI = -34 s Leap seconds can be introduced in UTC at the end of the months of December or June, depending on the evolution of UT1-TAI. Bulletin C is mailed every six months, either to announce a time step in UTC, or to confirm that there will be no time step at the next possible date. Daniel GAMBIS Director Earth Orientation Center of IERS Observatoire de Paris, France IMPORTANT: After years of discussions, a proposal to fundamentally redefine UTC will come to a conclusive vote in January 2012 at the ITU-R in Geneva. This proposal would halt the intercalary adjustments known as leap seconds that maintain UTC as a form of Universal Time. The Earth Orientation Center of the IERS organizes a survey online with the objective to find out the strength of opinion for maintaining or changing the present system. Link to the questionnaire: http://hpiers.obspm.fr/eop-pc/index.php?index=questionnaire Your response is appreciated before 30 August 2011 __________________________________________

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TAI zone?
by David Magda July 5, 2011

July 5, 2011

[Not a subscriber, so please CC.] Hello, There's been some discussion of removing leap seconds from UTC, as some people need/want a more predictable and deterministic time scale. [1] Given that International Atomic Time [2] exists, there doesn't seem to be an easy way to reference it. Is there any reason why a TAI "time zone" ("TZ=TAI; export TZ") is not present for those that want to ignore leap seconds? I noticed that some Linux distributions have a "right/" directory [3] to deal with this in some way: > Two different versions are provided: > - The "posix" version is based on the Coordinated Universal Time (UTC). > - The "right" version is based on the International Atomic Time (TAI), > and it includes the leap seconds. [...] > > - TZDIR=/usr/share/zoneinfo/posix TZ=Europe/Paris on a system with > hardware clock set to UTC. > - TZDIR=/usr/share/zoneinfo/right TZ=Europe/Paris on a system with > hardware clock set to TAI. Regards, David [1] http://cacm.acm.org/magazines/2011/5/107699-the-one-second-war/fulltext [2] http://en.wikipedia.org/wiki/International_Atomic_Time [3] /usr/share/doc/tzdata/README.Debian

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Israel extends Daylight Savings Time
by Alexander Krivenyshev July 4, 2011

July 4, 2011

According to the Israel Prime Minister's Office (pmo.gov.il), Cabinet Approves draft legislation to extend Daylight Savings Time to an average of 193 days, as opposed to 182 today. Cabinet Approves Extension of Daylight Savings Time http://www.pmo.gov.il/PMOEng/Communication/Spokesman/2011/07/spokeclock0307… m or http://www.worldtimezone.com/dst_news/dst_news_israel03.html Alexander Krivenyshev http://www.worldtimezone.com

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[OT] Fwd: Why the name in America/Guayaquil?
by José Miguel Parrella Romero July 1, 2011

July 1, 2011

I'm forwarding this query to the list, and will greatly appreciate any comments. Thanks!

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Cairo TZ Environment Variable
by 雍義 July 1, 2011

July 1, 2011

Hello, I've just compiled tzdata2011h.tar.gz and found Cairo's TZ environment variable is empty. So I checked http://en.wikipedia.org/wiki/Egypt and use "EET-2". But I've never been to Cairo so I'm not absolute sure whether people there use that. Just FYI. Regards, Richard

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