November 2006 - 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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Australia - Broken Hill - Yancowinna
by Oscar van Vlijmen 15 Dec '06

15 Dec '06

Broken Hill, or more precise, the whole county of Yancowinna, differs from the rest of New South Wales, as clearly stated in the TZ database. Problem is: what is the "county of Yancowinna"? The Australian Standard Time Act 1987 mentions this county, but doesn't mention the county boundaries. Once they were known, but they have disappeared from recent maps. Finally I found a scan of an old map from the Land Registry, showing the Yancowinna county. Found on the website of The Sydney Morning Herald: <http://www.smh.com.au/articles/2003/08/29/1062050651816.html?oneclick=true> Click on field number 2 or download the map directly: <http://www.smh.com.au/specials/leases/pdf/map2.pdf> The following places are within the county boundaries: Broken Hill, The Gorge, Mount Gipps, Silverton, Stephens Creek, Wahratta, Yanco Glen. The name "Wahratta" is not perfectly readable from the map, but I've checked the name and location against the Australia file from the GEOnet Names Server <http://earth-info.nga.mil/gns/> Oscar van Vlijmen 2005-04-23

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Vzic indicates missing tz rules
by Andy McDonald 30 Nov '06

30 Nov '06

I've been using 'vzic' (http://dialspace.dial.pipex.com/prod/dialspace/town/pipexdsl/s/asbm26/vzic/) to convert tz data to iCal. vzic 1.3 issues the following - hopefully self-explanatory warnings when run against tz/2006p: ----------------- andy@zanzibar:~/packages/vzic-1.3$ ./vzic --pure WARNING: Couldn't find a LETTER_S to use in FORMAT: C%sT in Zone: Asia/Macau Leaving TZNAME empty WARNING: Couldn't find a LETTER_S to use in FORMAT: TM%sT in Zone: Asia/Ashgabat Leaving TZNAME empty WARNING: Couldn't find a LETTER_S to use in FORMAT: CE%sT in Zone: Europe/Warsaw Leaving TZNAME empty WARNING: Couldn't find a LETTER_S to use in FORMAT: WE%sT in Zone: Atlantic/Azores Leaving TZNAME empty WARNING: Couldn't find a LETTER_S to use in FORMAT: Y%sT in Zone: America/Nome Leaving TZNAME empty WARNING: Couldn't find a LETTER_S to use in FORMAT: M%sT in Zone: America/Inuvik Leaving TZNAME empty WARNING: Couldn't find a LETTER_S to use in FORMAT: P%sT in Zone: America/Whitehorse Leaving TZNAME empty WARNING: Couldn't find a LETTER_S to use in FORMAT: P%sT in Zone: America/Dawson Leaving TZNAME empty andy@zanzibar:~/packages/vzic-1.3$ ----------------- (this is a slightly modified version of vzic - see below; the '--pure' option is not important). Following through in tz for America/Inuvik, we see: ----------------- # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule NT_YK 1918 only - Apr 14 2:00 1:00 D Rule NT_YK 1918 only - Oct 27 2:00 0 S ... Zone America/Inuvik -8:54:52 - LMT 1884 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 -7:00 NT_YK M%sT 1980 -7:00 Canada M%sT ----------------- Significantly, America/Inuvik is defined explicitly from the 1800's onwards, but the rule NT_YK is defined only from 1918, hence this missing 'LETTER/S'. Similar issues affect America/Whitehorse and America/Dawson. America/Nome uses the rule 'US' from 1943 to 1946, although the rule isn't defined for most of that period. Spot-checking the other problem zones indicates similar problems. I've exchanged a few e-mails with the developer of vzic; he pointed out that vzic works around most of the above 'problem' zones (see line 899 of vzic_output.c, v1.3); I commented out the workaround to derive the above output. With the workaround, vzic warns on Inuvik, Whitehorse and Dawson only. Andy

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register timezone mailing list
by Tri Duong Minh 29 Nov '06

29 Nov '06

Hi All, I would like to join timezone mailing list. Could you please register for me? My information: Email: dmtri(a)tma.com.vn First name: Tri Full name: Duong Minh Tri Sex: Male Nationality: Vietnam Regards, Tri Duong Shasta - Application EXT: 5669

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FW: Suggestions about separation and ISO code
by Olson, Arthur David (NIH/NCI) [E] 29 Nov '06

29 Nov '06

I'm forwarding this message from Jonas Melian who, after sending it, has subscribed to the time zone mailing list. --ado -----Original Message----- From: Jonas Melian [mailto:jonas.esp@googlemail.com] Sent: Monday, November 27, 2006 6:21 AM To: tz(a)lecserver.nci.nih.gov Subject: Suggestions about separation and ISO code Some suggestions: 1) To using ISO 3166 3-character country code becasuse is more readable. http://en.wikipedia.org/wiki/ISO_3166-1 For any person it's easier to identify a country by the code of 3-letters that by the one of 2-letters. 2) Columns separated by another character different of a tab, as ':'. So it's more readable for humans and too for the machines. And so it's easier to maintain that table. I comment you these suggestions because I have something of experience with this type of tables as you can see here: http://webda.python-hosting.com/browser/trunk/data Greetings!

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Turkey DST data missmatch
by Tiberiu Covaci 28 Nov '06

28 Nov '06

Hi, According to the http://www.timeanddate.com/worldclock/city.html?n=107 Turkey is observing DST same as EU but instead of using 1:00 local time, they are using 1:00u. A closer look in the europe file, will show that they use EU rule with no change (1:00 local time). According to unofficial sources in Turkey, and Worldclock representant, the right value would be 1:00u. Please advice how to proceed to make the data into the next release of tzdata. Regards, Tiberiu Covaci

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Faroe Islands
by Sue Williams 28 Nov '06

28 Nov '06

The ISO 3166 English spelling for this region is "Faroe Islands". http://www.iso.org/iso/en/prods-services/iso3166ma/02iso-3166-code-lists/li… Since the ISO spelling is normally approved by the government of the region involved, the ISO spelling is probably a reliable reference. ...Sue

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FW: Turkey DST data missmatch
by Olson, Arthur David (NIH/NCI) [E] 28 Nov '06

28 Nov '06

I'm forwarding this message from Tiberiu Covaci, who is not on the time zone mailing list. Those of you who are on the list should direct replies appropriately. --ado -----Original Message----- From: Tiberiu Covaci [mailto:tcovaci@bea.com] Sent: Tuesday, November 28, 2006 4:10 AM To: tz(a)lecserver.nci.nih.gov Subject: Turkey DST data missmatch Hi, According to the http://www.timeanddate.com/worldclock/city.html?n=107 Turkey is observing DST same as EU but instead of using 1:00 local time, they are using 1:00u. A closer look in the europe file, will show that they use EU rule with no change (1:00 local time). According to unofficial sources in Turkey, and Worldclock representant, the right value would be 1:00u. Please advice how to proceed to make the data into the next release of tzdata. Regards, Tiberiu Covaci

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