March 2010 - tz - lists.iana.org

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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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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Can you add permatime.com to the twinsun link page
by Tim Diggins May 19, 2011

May 19, 2011

Hi there - I've been lurking on the list for a while. I don't contribute much as a I'm a (humbly grateful) user of tz information, rather than a provider. I mentioned our http://permatime.com site, a while back, but don't think I explicitly asked for it to go on the twinsun link page under "Web pages using recent versions of the tz database". Can it? http://permatime.com is a service for generating and viewing links that refer to a particular point in time and can be displayed in multiple timezones. It uses the ruby tzinfo gem, based on the Olson Tz database. kind regards Tim http://permatime.com http://teamportfolios.com/permatime Tim Diggins http://red56.co.uk http://tim.teamportfolios.com/

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Tomsk wrong timezone
by Jesper Norgaard Welen Feb. 18, 2011

Feb. 18, 2011

A quote from the 'europe' file: # Novosibirskaya oblast'. Zone Asia/Novosibirsk 5:31:40 - LMT 1919 Dec 14 6:00 6:00 - NOVT 1930 Jun 21 # Novosibirsk Time 7:00 Russia NOV%sT 1991 Mar 31 2:00s 6:00 Russia NOV%sT 1992 Jan 19 2:00s 7:00 Russia NOV%sT 1993 May 23 # say Shanks & P. 6:00 Russia NOV%sT # # From Oscar van Vlijmen (2001-08-25): [This region consists of] # Kemerovskaya oblast', Krasnoyarskij kraj, # Tajmyrskij (Dolgano-Nenetskij) avtonomnyj okrug, Tomskaya oblast', # Respublika Tuva, Respublika Khakasiya, Evenkijskij avtonomnyj okrug. Zone Asia/Krasnoyarsk 6:11:20 - LMT 1920 Jan 6 6:00 - KRAT 1930 Jun 21 # Krasnoyarsk Time 7:00 Russia KRA%sT 1991 Mar 31 2:00s 6:00 Russia KRA%sT 1992 Jan 19 2:00s 7:00 Russia KRA%sT In fact, it seems that Tomsk city and Tomskaya oblast' is part of the Novosibirsk timezone, see http://en.wikipedia.org/wiki/Tomskaya_Oblast%27%2C_Russia and http://www.admin.tomsk.ru/1024 ... the latter, if you don't understand russian, look at the time under the green horse. I don't know if this simply means that Tomskaya oblast' changed timezone since 2001, which is a possibility, that would then require a new timezone. Regards, - Jesper Jesper Nørgaard Welen Email: jnorgard(a)Prodigy.Net.mx Project Leader (Líder de Proyecto) Software CIMMYT - Centro Internacional de Mejoramiento de Maíz y Trigo Dirección: CIMMYT Int. c/o Jesper Nørgaard Km. 45, Carretera México-Veracruz El Batán Texcoco, Edo. de México CP 56130 MEXICO Tel.: +52 (55) 58-04-20-04 ext. 1374 Fax: +52 (55) 58-04-75-58 Tel. Casa: 53-10-05-95 ó 53-10-97-78 Download the shareware program World Time Explorer, I made: http://www.worldtimeexplorer.com/index.html

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FW: Proposal to the Paraguayan Government
by Olson, Arthur David (NIH/NCI) [E] April 5, 2010

April 5, 2010

I'm forwarding this message from Carlos Raúl Perasso, who is not on the time zone mailing list. Those of you who are on the list, please direct replies appropriately. --ado ________________________________________ From: Carlos Raúl Perasso [crperasso(a)gmail.com] Sent: Wednesday, March 31, 2010 2:32 PM To: olsona(a)lecserver.nci.nih.gov Subject: Proposal to the Paraguayan Government Hi Olson... I would like to know, considering the tz datebase update procedure and the frequency at which mayor Linux distros, Java, Oracle and so on replicate this updates, how many days do you think there should be between a rule change and the next date it affects. Thanks and best regards, Carlos Raúl Perasso ...

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FW: Questions about tzdata implementations
by Olson, Arthur David (NIH/NCI) [E] April 1, 2010

April 1, 2010

I'm forwarding this message from Chad Eberle, who is not on the time zone mailing list. Those of you who are on the list, please direct replies appropriately. --ado -----Original Message----- From: Chad Eberle [mailto:ceberle@co.pierce.wa.us] Sent: Monday, March 29, 2010 1:15 To: tz(a)lecserver.nci.nih.gov Subject: Questions about tzdata implementations I apologize if this isn't the right place for this question, but would appreciate any help with tracking down the answer to these questions. Background: We have Java web services that send back date/time values with GMT offsets adjusted for DST following historical rules that match what I see in the northamerica file for America/Los_Angeles. Our client code is largely JavaScript, and depending on the operating system, will sometimes be incongruous about when DST starts or ends (dates before 2007 on Windows and before 1950. As one can imagine, this has caused a few problems. I can't seem to find any solution for the JavaScript end, so I was planning on writing one myself (if anyone knows of a solution, I'd appreciate any pointers). My questions: 1) Is there some reference implementation for the algorithm that selects the correct rule for a given date? 2) For the general US rules, there is a rule that says DST started in 1945 on Aug 14 at 23:00; however, my tests in Java indicate that DST was observed from Feb 9 1942 through Sep 30 1945, continuously. The latter matches the historical information I've found. Is this rule superfluous? Again, any tips would be appreciated. --Chad Eberle

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How can I reduce size of zoneinfo compiled binary files?
by Dominique Pellé March 31, 2010

March 31, 2010

Hi I'd like to compile the zoneinfo files for an embedded system where I'd like to strip as much information as possible. I see that all the zoneinfo binary files take 6.1Mb: $ du -s -h /usr/share/zoneinfo/ 6,1M /usr/share/zoneinfo/ If I run the zic compiler, it produces the following file sizes for example for Europe/Paris, Europe/Amsterdam, Europe/Berlin: $ mkdir -p test $ zic -d test europe $ ls -l test/Europe/{Paris,Amsterdam,Berlin} -rw-r--r-- 1 pel pel 2917 2010-03-31 22:09 test/Europe/Amsterdam -rw-r--r-- 1 pel pel 2309 2010-03-31 22:09 test/Europe/Berlin -rw-r--r-- 1 pel pel 2945 2010-03-31 22:09 test/Europe/Paris Since I don't care about time zone rules in the past for my embedded application, I'd like to compile only the rules starting at year >= 2010 for example (in other words, I'd like to ignore all historical rules older than < 2010). I would then expect output binary files to become not only smaller, but also many of them should also identical since most countries in Europe follow the same rules nowadays (Europe/Amsterdam, Europe/Berlin and Europe/Paris in my above example should become identical). So I should then be able to create links to most of them. However, I don't see any command line option in the 'zic' compiler to let me compile rules from >= 2010 only, or am I missing something? I suppose that I could edit the input ASCII file 'europe', 'asia' (etc) to remove rules in the past, but it seems error prone (especially since input text files can be updated regularly). Is there a simpler solution? Thanks -- Dominique

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tzdata file is incorrect for Canada/Newfoundland?
by D. Greening March 31, 2010

March 31, 2010

I don't think the tzdata file is correct for Canada/Newfoundland. When will this be updated?

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proposed time zone package changes (Pakistan and Tunisia)
by Arthur David Olson March 31, 2010

March 31, 2010

Below are proposed changes to the time zone package; a summary: africa No Tunisia DST 2010 and forward asia No Pakistan DST 2010 and forward If no problems are found these will show up on the ftp site on 2010-04-05. --ado ------- africa ------- *** /tmp/geta17120 Wed Mar 31 10:24:32 2010 --- /tmp/getb17120 Wed Mar 31 10:24:32 2010 *************** *** 1,5 **** # <pre> ! # @(#)africa 8.23 # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. --- 1,5 ---- # <pre> ! # @(#)africa 8.24 # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. *************** *** 942,947 **** --- 942,965 ---- # Therefore, the standard time will be kept unchanged the whole year long." # So foregoing DST seems to be an exception (albeit one that may be repeated in the future). + # From Alexander Krivenyshev (2010-03-27): + # According to some news reports Tunis confirmed not to use DST in 2010 + # + # (translation): + # "The Tunisian government has decided to abandon DST, which was scheduled on + # Sunday... + # Tunisian authorities had suspended the DST for the first time last year also + # coincided with the month of Ramadan..." + # + # (in Arabic) + # <a href="http://www.moheet.com/show_news.aspx?nid=358861&pg=1"> + # http://www.moheet.com/show_news.aspx?nid=358861&pg=1 + # <a href="http://www.almadenahnews.com/newss/news.php?c=118&id=38036"> + # http://www.almadenahnews.com/newss/news.php?c=118&id=38036 + # or + # <a href="http://www.worldtimezone.com/dst_news/dst_news_tunis02.html"> + # http://www.worldtimezone.com/dst_news/dst_news_tunis02.html + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Tunisia 1939 only - Apr 15 23:00s 1:00 S Rule Tunisia 1939 only - Nov 18 23:00s 0 - *************** *** 968,975 **** Rule Tunisia 2005 only - Sep 30 1:00s 0 - Rule Tunisia 2006 2008 - Mar lastSun 2:00s 1:00 S Rule Tunisia 2006 2008 - Oct lastSun 2:00s 0 - ! Rule Tunisia 2010 max - Mar lastSun 2:00s 1:00 S ! Rule Tunisia 2010 max - Oct lastSun 2:00s 0 - # Shanks & Pottenger give 0:09:20 for Paris Mean Time; go with Howse's # more precise 0:09:21. # Shanks & Pottenger say the 1911 switch was on Mar 9; go with Howse's Mar 11. --- 986,992 ---- Rule Tunisia 2005 only - Sep 30 1:00s 0 - Rule Tunisia 2006 2008 - Mar lastSun 2:00s 1:00 S Rule Tunisia 2006 2008 - Oct lastSun 2:00s 0 - ! # Shanks & Pottenger give 0:09:20 for Paris Mean Time; go with Howse's # more precise 0:09:21. # Shanks & Pottenger say the 1911 switch was on Mar 9; go with Howse's Mar 11. ------- asia ------- *** /tmp/geta17138 Wed Mar 31 10:24:32 2010 --- /tmp/getb17138 Wed Mar 31 10:24:32 2010 *************** *** 1,4 **** ! # @(#)asia 8.58 # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. --- 1,4 ---- ! # @(#)asia 8.59 # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. *************** *** 1912,1924 **** # [T]he German Consulate General in Karachi reported me today that Pakistan # will go back to standard time on 1st of November. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Pakistan 2002 only - Apr Sun>=2 0:01 1:00 S Rule Pakistan 2002 only - Oct Sun>=2 0:01 0 - Rule Pakistan 2008 only - Jun 1 0:00 1:00 S Rule Pakistan 2008 only - Nov 1 0:00 0 - ! Rule Pakistan 2009 max - Apr 15 0:00 1:00 S ! Rule Pakistan 2009 max - Nov 1 0:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Karachi 4:28:12 - LMT 1907 5:30 - IST 1942 Sep --- 1912,1946 ---- # [T]he German Consulate General in Karachi reported me today that Pakistan # will go back to standard time on 1st of November. + # From Steffen Thorsen (2010-03-26): + # Steffen Thorsen wrote: + # > On Thursday (2010-03-25) it was announced that DST would start in + # > Pakistan on 2010-04-01. + # > + # > Then today, the president said that they might have to revert the + # > decision if it is not supported by the parliament. So at the time + # > being, it seems unclear if DST will be actually observed or not - but + # > April 1 could be a more likely date than April 15. + # Now, it seems that the decision to not observe DST in final: + # + # "Govt Withdraws Plan To Advance Clocks" + # <a href="http://www.apakistannews.com/govt-withdraws-plan-to-advance-clocks-172041"> + # http://www.apakistannews.com/govt-withdraws-plan-to-advance-clocks-172041 + # </a> + # + # "People laud PM's announcement to end DST" + # <a href="http://www.app.com.pk/en_/index.php?option=com_content&task=view&id=99374&I…"> + # http://www.app.com.pk/en_/index.php?option=com_content&task=view&id=99374&I… + # </a> + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Pakistan 2002 only - Apr Sun>=2 0:01 1:00 S Rule Pakistan 2002 only - Oct Sun>=2 0:01 0 - Rule Pakistan 2008 only - Jun 1 0:00 1:00 S Rule Pakistan 2008 only - Nov 1 0:00 0 - ! Rule Pakistan 2009 only - Apr 15 0:00 1:00 S ! Rule Pakistan 2009 only - Nov 1 0:00 0 - ! # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Karachi 4:28:12 - LMT 1907 5:30 - IST 1942 Sep

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Tunis confirmed not to use DST in 2010
by Alexander Krivenyshev March 30, 2010

March 30, 2010

According to some news reports Tunis confirmed not to use DST in 2010 (translation:) "The Tunisian government has decided to abandon DST, which was scheduled on Sunday ... Tunisian authorities had suspended the DST for the first time last year also coincided with the month of Ramadan..." (in Arabic) http://www.moheet.com/show_news.aspx?nid=358861&pg=1 http://www.almadenahnews.com/newss/news.php?c=118&id=38036 or http://www.worldtimezone.com/dst_news/dst_news_tunis02.html Alexander Krivenyshev, http://www.worldtimezone.com

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