June 2007 - 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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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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Chinese timezones 1970
by Jesper Norgaard Welen Sept. 14, 2008

Sept. 14, 2008

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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More daylight savings in Australia
by Eric Ulevik July 23, 2007

July 23, 2007

The states of NSW, Victoria, ACT, Tasmania plan to harmonize DST, starting October 2007. "Under the plan, clocks will go forward one hour on the first Sunday in October, instead of on the last Sunday, and will be wound back by an hour on the first Sunday in April, rather than on the last Sunday in March." http://www.news.com.au/story/0,23599,21549128-2,00.html Regards, Eric Ulevik

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FW: Implementation of zoneinfo (Olson, tz) database in .NET c-sharp csharp
by Olson, Arthur David (NIH/NCI) [E] July 18, 2007

July 18, 2007

I'm forwarding this message from Joshua Kifer, 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: Joshua Kifer [mailto:joshua@jotts.com] Sent: Wednesday, June 20, 2007 8:33 PM To: tz(a)lecserver.nci.nih.gov Subject: Implementation of zoneinfo (Olson, tz) database in .NET c-sharp csharp I finally found an implementation of this at CodePlex. It's part of the PublicDomain project. http://www.codeplex.com/publicdomain I hope this post adds some search fodder to the interweb for all those unlucky bastards seeking (and not finding) the same.

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Geographical boundaries for the continental US tz zones
by Eric Muller July 18, 2007

July 18, 2007

I am trying to figure out the geographical extent of the 19 continental US timezones defined by tz. Because my goal is ultimately to create a freely available digital map, I would like to get definitions in terms existing, freely available digital maps, and the ones at nationalatlas.gov seem appropriate. Specifically, I plan to use countyp020 (county boundaries 2001), statesp020 (states) and timeznp020 (time zones) [see below for more details on those maps]. I tried to translate the comments in the "northamerica" file in terms of operations on the elements of those three maps, but I have a few questions/comments. 1. I would think that America/Boise, America/Denver and America/Phoenix together correspond exactly to the Mountain time zone of timeznp020. However, the later includes the southern quarter of Idaho County, Idaho, while northamerica suggests that this county is entirely in America/Pacific. Who is right? 2. The description of America/Denver includes "far eastern Oregon", and the description of America/Boise includes "eastern Oregon". Comparing with timeznp020, I suspect that America/Denver should not include "far eastern Oregon". (and if timeznp020 is right, "eastern Oregon" could be better described as "most of Malheur County, Oregon"). 3. What does America/Indiana/Indianapolis cover? Is it all the counties of Indiana not listed in any of the other zones? 4. The overall description of Indiana includes: # - Daviess, Dubois, Knox, Martin, Perry, and Pulaski counties # have been like America/Indiana/Vincennes. # # - Crawford, Pike, Starke, and Switzerland counties have their own time zone # histories as noted below. However, it seems that Pulaski now has it own zone (America/Indiana/Winamac), so it should probably be moved from the first to the second bullet in the quote above. 5. The description of America/Indiana/Marengo is that it covers the eastern part of Crawford County. How is that county divided, and in which zone does the western part fall? 6. What part of Kentucky goes in America/Kentucky/Louisville? At this point, I am not trying to handle border towns such as West Wendover, mostly because I have no idea of where to find a boundary for such towns. Any suggestion on what to do for those cases is welcome. For those of you who are curious about the content of the maps cited above: you can download them from <http://nationalatlas.gov/atlasftp.html> and visualize them using standard GIS tools (I use the freely available OpenJUMP and uDig). Alternatively, I have created a KML version of timeznp020 (using org2ogr) and placed it at <http://efele.net/timeznp020.zip> (4MB, 15MB uncompressed); you can visualize it in Google Earth (File->Open); I assume that the built-in 1st level and 2nd level admin regions (under "borders") are close enough to statesp020 and countyp020. Below is my current recipe to build my map in terms of operations in the source maps. Comments welcome. Thanks, Eric. --- Phoenix timeznp020/(Mountain & no DST) Boise statesp020/(Idaho+Oregon) intersected with timeznp020/Mountain North_Dakota/Center countyp020/(Oliver County, North Dakota) North_Dakota/New_Salem countyp020/(Morton County, North Dakota) Indiana/Marengo countyp020/(Crawford County, Indiana) // should only be the eastern part of Crawford County? where is the // limit? where does the western part go? Indiana/Vincennes countyp020/(Daviess, Dubois, Knox, Martin, and Perry Counties, Indiana) Indiana/Petersburg countyp020/(Pike County, Indiana) Indiana/Knox countyp020/(Starke County, Indiana) Indiana/Winamac countyp020/(Pulaski County, Indiana) Indiana/Vevay countyp020/(Switzerland County, Indiana) Kentucky/Louisville countyp020/(Clark, Floyd, and Harrison counties, Indiana) // what part of Kentucky is in this zone? Kentucky/Monticello countyp020/(Wayne County, Kentucky) Indiana/Indianapolis ? // statesp020/Indiana minus what is already covered above minus // Dearborn and Ohio County (they are in America/New_York) and // minus Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, // Spencer, Vanderburgh, // and Warrick counties (they are in America/Chicago) Menominee countyp020/(Dickinson, Gogebic, Iron, and Menominee Counties, Michigan) Detroit statesp020/Michigan minus what is already covered above Los_Angeles timeznp020/Pacific minus what is already covered above Denver timeznp020/Mountain minus what is already covered above Chicago timeznp020/Central minus what is already covered above New_York timeznp020/Eastern minus what is already covered above ----

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FW: Does UTC+14 Still Exist?
by Olson, Arthur David (NIH/NCI) [E] July 18, 2007

July 18, 2007

I'm forwarding this message from Robert Chapin 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 -----Original Message----- From: Robert Chapin [mailto:tz@info-svc.com] Sent: Tuesday, June 26, 2007 10:47 PM To: tz(a)lecserver.nci.nih.gov Subject: Does UTC+14 Still Exist? The latest CIA map doesn't have the UTC+14 time zone on it.. https://www.cia.gov/library/publications/the-world-factbook/reference_ma ps/p df/time_zones.pdf I'm curious if this is accurate? _____________ Robert Chapin

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FW: Vietnam: Saigon is deprecated, should use capital Hanoi
by Olson, Arthur David (NIH/NCI) [E] July 13, 2007

July 13, 2007

I'm forwarding this message from Martin Pitt, 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 -----Original Message----- From: Martin Pitt [mailto:martin.pitt@ubuntu.com] Sent: Friday, June 22, 2007 2:27 AM To: tz(a)lecserver.nci.nih.gov Cc: 121540(a)bugs.launchpad.net Subject: Vietnam: Saigon is deprecated, should use capital Hanoi Hello Arthur and tzdata team, we just got this tzdata bug in Ubuntu: https://bugs.launchpad.net/ubuntu/+source/tzdata/+bug/121540 which points out that "Saigon" has been renamed to "Ho Chi Minh" a long time ago. The comment in the asia file already mentions that: # Saigon's official name is Thanh-Pho Ho Chi Minh, but it's too long. # We'll stick with the traditional name for now. A nice solution to avoid obsolete names, retain a short name, and even get more consistent is to use "Hanoi", which is the actual capital of Vietnam (and is the very same TZ). Then Saigon could just be an alias (i. e. transitional symlink) to Hanoi. What do you think about that? Thank you in advance, Martin -- Martin Pitt http://www.piware.de Ubuntu Developer http://www.ubuntu.com Debian Developer http://www.debian.org

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subscribe
by Lorn Potter June 28, 2007

June 28, 2007

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Does UTC+14 Still Exist?
by Robert Chapin June 26, 2007

June 26, 2007

The latest CIA map doesn't have the UTC+14 time zone on it.. https://www.cia.gov/library/publications/the-world-factbook/reference_maps/p df/time_zones.pdf I'm curious if this is accurate? _____________ Robert Chapin

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