November 2007 - tz - lists.iana.org

proposed tz change for Latvia, Lithuania
by Paul Eggert 25 May '15

25 May '15

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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Tomsk wrong timezone
by Jesper Norgaard Welen 18 Feb '11

18 Feb '11

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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Chinese timezones 1970
by Jesper Norgaard Welen 14 Sep '08

14 Sep '08

I have investigated the timezones around 1970 on the http://www.astro.com/atlas site, and here are the results. I am attaching a GIF file of the map I have built based on this information. The red borders are the modern-time administrative borders, while the green lines are the timezone borders I have determined, note that some of them are partially hidden behind the red lines. There are no big surprises. Most timezones follow modern-day administrative boundaries, with the exceptions being Xinjiang, Xizang (Tibet), Qinghai, Gansu, Nei Mongol (Inner Mongolia) and Guangdong. There was an exception in Heliongjiang region on GMT+8.5 where the northern-most county Mohe is on GMT+8. A few other exceptions were two counties on the Sichuan side of the Xizang - Sichuan border, counties Dege and Baiyu which lies on the Sichuan side and are therefore supposed to be GMT+7, Xizang region being GMT+6, but Dege county is GMT+8 according to astro.com while Baiyu county is GMT+6 (could be true), for the moment I am assuming that those two counties are mistakes in the astro.com data. The biggest surprise was that region Guangdong were dived in 3 timezones, a south/west part on GMT+6 (counties Xuwen, Haikang, Suixi, Lianjiang, Zhanjiang, Wuchuan, Huazhou, Gaozhou, Maoming, Dianbai, Xinyi) a central part on GMT+7 (counties Yangchun, Yangjiang, Taishan, Kaiping, Xinxing, Luoding, Yu'nan, Yunfu, Taishan, Deqing and Enping) and a north/east part on GMT+8 with the rest of the counties. Zone Asia/Harbin on GMT+8.5: regions Heilongjiang (minus Mohe) and Jilin. Zone Asia/Shanghai on GMT+8: regions east Nei Mongol, Liaoning, Hebei + Beijing, Shanxi, Shandong, Henan, Jiangsu, Anhui, Shanghai, Zhejiang, Hubei, Hunan, Jiangxi, Fujian, north/east Guangdong and Mohe county of Heilongjiang. Zone Asia/Chongqing on GMT+7: regions west Nei Mongol, Ningxia, Shaanxi, east Gansu, west Qinghai, Sichuan, Guizhou, Guangxi, Yunnan, Hainan island and the central part of Guangdong province. Zone Asia/Urumqi on GMT+6: regions east Xinjiang, west Gansu (counties Dunhuang, Aksay, Anxi, Subei), west Qinghai, east Xizang (Tibet) and east Guangdong. Zone Asia/Kashgar on GMT+5: regions west Xinjiang, west Xizang. 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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Minor improvement to tzfile.5
by Jonathan Leffler 06 Dec '07

06 Dec '07

Part way through the description of the file structure, the document says: These values serve as indices into an array of ttinfo structures that appears next in the file; these structures are defined as follows: It isn't immediately clear that there are tzh_typecnt entries in the array of ttinfo structures. Maybe the modification is as simple as: These values serve as indices into an array of ttinfo structures (with tzh_typecnt entries) that appears next in the file; these structures are defined as follows: -- Jonathan Leffler <jonathan.leffler(a)gmail.com> #include <disclaimer.h> Guardian of DBD::Informix - v2007.0914 - http://dbi.perl.org "Blessed are we who can laugh at ourselves, for we shall never cease to be amused."

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FW: 'Web pages using recent versions of the tz database'
by Olson, Arthur David (NIH/NCI) [E] 30 Nov '07

30 Nov '07

I'm forwarding this message from Rich Tibbett, who is not on the time zone mailing list. Those of you who are on the time zone mailing list should direct replies appropriately. --ado From: Rich Tibbett [mailto:rich.tibbett@gmail.com] Sent: Friday, November 30, 2007 1:01 AM To: tz(a)lecserver.nci.nih.gov Subject: 'Web pages using recent versions of the tz database' Hello, I just wanted to say that we've been working on an implementation of the latest tz database over at http://www.worldtimeengine.com. It's an ambitious project linking the tz database with tz boundary shapefiles, topped off with integration to Google's Location Resolution Service. The aim is to have a Google-esque search box where you can enter any village, town, city or point-of-interest around the world and it will tell you the current local time. It would be great to receive some feedback from you. Keep up the good work! Richard Tibbett

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FW: Help regarding the timezone update data
by Olson, Arthur David (NIH/NCI) [E] 30 Nov '07

30 Nov '07

I'm forwarding this message from Salil G K who, since sending it, has been added to the time zone mailing list. --ado From: Salil G K (sagk) [mailto:sagk@cisco.com] Sent: Tuesday, November 06, 2007 4:22 To: Olson, Arthur David (NIH/NCI) [E] Subject: Help regarding the timezone update data Importance: High Hello I am trying to get information about the timezone updation data for updating the zone information of jre environment. I have seen from http://www.twinsun.com/tz/tz-link.htm the procedure for getting the data from the 'ftp://elsie.nci.nih.gov/pub/ and how to get the timezone data files. I followed the procedures there, but I guess I am not getting a correct information in my system. I tested by writing a simple java program which will just print Date from the system. My system in in India time zone (Asia/Calcutta ) but I have TZ variable to America/Caracas ( which I think is for Venezuela ) and print the time with the fix and without the fix. I have set the system time as Jan 30 2008 ( b'se I guess Venezuela DST will start from Jan 1st ). Both tests I am getting the same time zone info. I am not sure if the procedures I am doing is correct to apply the fix. So do you have any document which describes about the implementation of this fix and how to test it. If you could consider this as a very urgent request it would be really great. thanks Salil

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'Web pages using recent versions of the tz database'
by Rich Tibbett 29 Nov '07

29 Nov '07

Hello, I just wanted to say that we've been working on an implementation of the latest tz database over at http://www.worldtimeengine.com. It's an ambitious project linking the tz database with tz boundary shapefiles, topped off with integration to Google's Location Resolution Service. The aim is to have a Google-esque search box where you can enter any village, town, city or point-of-interest around the world and it will tell you the current local time. It would be great to receive some feedback from you. Keep up the good work! Richard Tibbett

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FW: Venezuela changes rescheduled for 9 December
by Olson, Arthur David (NIH/NCI) [E] 29 Nov '07

29 Nov '07

I'm forwarding this message from John Stainforth, who is not on the time zone mailing list. Those of you who are on the time zone mailing list should direct replies appropriately. --ado From: John Stainforth [mailto:STAIN@uk.ibm.com] Sent: Wednesday, November 28, 2007 6:17 To: eggert(a)CS.UCLA.EDU Cc: Olson, Arthur David (NIH/NCI) [E] Subject: Venezuela changes rescheduled for 9 December Paul, Apologies if you are receiving this information from several sources in IBM, but we are reacting to breaking news that the change for Venezuela originally expected for 31 December has been brought forward to 9 December. The official announcement was published today in the "Gaceta Oficial de la Republica Bolivariana de Venezuela, número 38.819" (official document for all laws or resolution publication) but is not available online yet. http://www.globovision.com/news.php?nid=72208 Previously, the best information we had was that this time zone change will not happen until January 1, 2008. as reflected in the Olson database update on 1-October-2007 (tzcode2007h). We had been proceeding based on the anticipated date, the evening of December 31st (ie effective jan 1). We did find a Microsoft reference http://blogs.msdn.com/mthree/archive/2007/11/27/venezuela-tz-112707.aspx and it appeared to suggest that the December 9th date was still subject to constitutional reform. See: http://www.venezuelanalysis.com/analysis/2645 http://www.reuters.com/article/worldNews/idUSN2426299520070924 Please let us know (we will watch the forum) if and when you are making an updated tzdata table update to implement the new date for Venezuela. Thanks and regards, John John Stainforth PMP Project Manager, Java Technologies IBM United Kingdom Limited MP146 Hursley Park, WINCHESTER, SO21 2JN Hicom Tel:7-246072 International -44-1962-816072 e-mail: stain(a)uk.ibm.com Now working part-time: Monday, Tuesday & Wednesday only ________________________________________ Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU

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FW: Japan's rules
by Olson, Arthur David (NIH/NCI) [E] 29 Nov '07

29 Nov '07

I'm forwarding this message from Chris Holt, who is not on the time zone mailing list. Those of you who are on the time zone mailing list should direct replies appropriately. --ado From: Chris Holt [mailto:cholt@skywardinnovations.com] Sent: Wednesday, November 28, 2007 9:44 To: tz(a)lecserver.nci.nih.gov Subject: Japan's rules It seems that Japan is missing its latest rule. The last rule it has is <Rule> <Name>Japan</Name> <From>1950</From> <To>1951</To> <Type>-</Type> <In>May</In> <On>Sun>=1</On> <At>2:00</At> <Save>1:00</Save> <Letter>D</Letter> </Rule> And the timezone is defined as: <Zone> <Name>Asia/Tokyo</Name> <GMTOffset>9:00</GMTOffset> <Rules>Japan</Rules> <Format>J%sT</Format> <Until /> <Comment /> </Zone> This forces the user to use JDT as the timezone abbreviation even though I believe they currently don't do daylight savings time. It seems this should be updated to: <Zone> <Name>Asia/Tokyo</Name> <GMTOffset>9:00</GMTOffset> <Rules>Japan</Rules> <Format>J%sT</Format> <Until>1951</Until> <Comment /> </Zone> <Zone> <Name>Asia/Tokyo</Name> <GMTOffset>9:00</GMTOffset> <Rules>-</Rules> <Format>JST</Format> <Until /> <Comment /> </Zone> Does this make sense? Thanks, Christopher Holt Skyward Innovations, Inc. Office: (603) 206-4552 Cell: (603) 765-0945 cholt(a)skywardinnovations.com www.skywardinnovations.com The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and delete the material from any computer.

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Re: Venezuela changes rescheduled for 9 December
by Paul Eggert 29 Nov '07

29 Nov '07

John Stainforth <STAIN(a)uk.ibm.com> writes: > we are reacting to breaking news that the change for Venezuela > originally expected for 31 December has been brought forward to 9 > December. The most recent information I had was an article published 2007-11-22 by ABN <http://www.abn.info.ve/go_news5.php?articulo=111435&lee=7> (in Spanish). I don't read Spanish, but my understanding from that article is that the decision was still tentative, and that they didn't want to mess with the clocks before the big referendum this Sunday, as that might confuse poll times. > The official announcement was published today in the "Gaceta Oficial de la > Republica Bolivariana de Venezuela, número 38.819" (official document for > all laws or resolution publication) but is not available online yet. > > http://www.globovision.com/news.php?nid=72208 Thanks for the heads-up. I didn't know about that. That looks about as definitive as we're going to get: they plan to switch from UTC-4 to UTC-4:30 at 03:00 local time on December 9. I'll send out a proposed patch shortly.

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