October 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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FW: Corrections to latitudes/longitudes in zone.tab
by Olson, Arthur David (NIH/NCI) [E] 01 Nov '06

01 Nov '06

I'm forwarding this message from Andy McDonald, who is not on the time zone mailing list. Those of you who are on the list: please direct replies appropriately. Thanks! --ado -----Original Message----- From: Andy McDonald [mailto:andy@stemhaus.com] Sent: Tuesday, October 31, 2006 12:29 AM To: tz(a)lecserver.nci.nih.gov Subject: Corrections to latitudes/longitudes in zone.tab Hi, I've run across a couple of inaccurate latitudes/longitudes in tz's zone.tab (2006n): Approx true lat/long zone.tab lat/long Europe/Jersey +4912-00207 +4912-00237 Europe/Podgorica +4227+01916 +4247+01928 Jersey perhaps looks like a typo.; Podgorica's latitude looks like a typo., but not the longitude. The corrected values come from playing with my Firefox time zone extension (http://www.stemhaus.com/firefox/foxclocks/) and Google Earth, and are of course entirely subjective. Regards, Andy McDonald

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FW: Cuba back on standard time
by Olson, Arthur David (NIH/NCI) [E] 31 Oct '06

31 Oct '06

I'm forwarding this message from Mike Castleman, who is not on the time zone mailing list. Those of you who are on the list: please direct replies to this message appropriately. Thanks! MC: others have also reported this information, and Paul Eggert has circulated proposed changes to the time zone database to reflect it; those changes should appear in the ftpable version of the database this coming Monday. --ado -----Original Message----- From: mike castleman [mailto:m@mlcastle.net] Sent: Tuesday, October 31, 2006 2:07 AM To: tz(a)lecserver.nci.nih.gov Subject: Cuba back on standard time According to _Granma_, the official newspaper: AT 1:00 a.m. on Sunday, October 29, the clocks in Cuba were put back one hour, thus standard time - also known as winter time - in Cuba has once more come into effect. [...] full article (english): http://www.granma.cu/ingles/2006/octubre/lun30/45hora.html (spanish): http://www.granma.cu/espanol/2006/octubre/vier27/horario-e.html The Spanish article is clearer than the English that the change took place at 1am summer time; i.e., midnight standard time.

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Strange historic timezone in Nigeria
by Jesper Norgaard Welen 31 Oct '06

31 Oct '06

Hi, tz emailing list I have stumbled over a peculiarity in the historic data about Nigeria, the africa file contains: Zone Africa/Niamey 0:08:28 - LMT 1912 -1:00 - WAT 1934 Feb 26 0:00 - GMT 1960 1:00 - WAT Since the timezone abbreviation 'WAT' is the same seemingly for both GMT-1 and GMT+1, my suspicion is that it should rather be Zone Africa/Niamey 0:08:28 - LMT 1912 1:00 - WAT 1934 Feb 26 0:00 - GMT 1960 1:00 - WAT which would make more sense from the lunar mean time value ... As a side-question, I'm trying to determine a meaningful area for the timezones Atikokan and Nipigon, it seems to me that they would be small, like a US county for instance, but I can't find anything about it. It seems they most be within the larger areas Rainy River district and Thunder Bay district, but how would it look on a map? Regards, Jesper

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Cuba back on standard time
by mike castleman 31 Oct '06

31 Oct '06

According to _Granma_, the official newspaper: AT 1:00 a.m. on Sunday, October 29, the clocks in Cuba were put back one hour, thus standard time – also known as winter time – in Cuba has once more come into effect. [...] full article (english): http://www.granma.cu/ingles/2006/octubre/lun30/45hora.html (spanish): http://www.granma.cu/espanol/2006/octubre/vier27/horario-e.html The Spanish article is clearer than the English that the change took place at 1am summer time; i.e., midnight standard time.

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Chile DST history
by Jesper Norgaard Welen 31 Oct '06

31 Oct '06

The page http://www.worldtimeserver.com claims that Chile starts DST this Sunday 8.th. of October at 1:00 so I got interested in if we have the information right concerning Chile. This made me revise the information in the tz database, which lead to the page http://www.shoa.cl which represents the oficial timekeeping of the armed forces of Chile, which in turn is the only authority on time setting matters in Chile since 11.th. of January 1966 according to decree No. 25 of that year. CIA factbook says on page http://www.cia.gov/cia/publications/factbook/geos/ci.html that DST starts second Sunday in October, ends Second Sunday of March. But according to the official page it is really Second Saturday of October at 24:00 and Second Saturday of March at 24:00. 2006 happens to be a year where these two rules get to different results, in fact DST begins in Chile in 2006 Saturday 14.th. of March at 24:00, according to one of the Chile web pages. In tz database, file southamerica says: # From Paul Eggert (2002-10-24): # <http://www.shoa.cl/shoa/faqhoraoficial.htm> gives many details that # disagree with the following table, but we haven't had time to compare them. As far as I see it, this is the maximum authority of time setting in Chile, which should supersede tz database, Shanks, IATA etc. If you disagree on this point, please forward good arguments. Therefore I recommend the following changes to the tz database. I took the time to check out in detail what the differences are from this source compared to tz database, based on the page http://www.horaoficial.cl/horaof.htm which contains timezone and time history in Chile since 1884. Here are the results if you apply those to the tz database (I might have made mistakes, since there are plenty of differences): # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Chile 1927 1931 - Sep 1 0:00 1:00 S Rule Chile 1928 1932 - Apr 1 0:00 0 - Rule Chile 1946 only - Aug 27 4:00u 1:00 S Rule Chile 1947 only - May 21 2:00u 0 - Rule Chile 1968 only - Nov 2 4:00u 1:00 S Rule Chile 1969 only - Mar 29 3:00u 0 - Rule Chile 1969 only - Nov 22 4:00u 1:00 S Rule Chile 1970 only - Mar 28 3:00u 0 - Rule Chile 1971 only - Mar 13 3:00u 0 - Rule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 S Rule Chile 1973 only - Sep 29 4:00u 1:00 S Rule Chile 1972 1986 - Mar Sun>=9 3:00u 0 - Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 S Rule Chile 1987 only - Apr 12 3:00u 0 - Rule Chile 1988 only - Oct Sun>=1 4:00u 1:00 S Rule Chile 1988 1989 - Mar Sun>=9 3:00u 0 - Rule Chile 1989 only - Oct Sun>=9 4:00u 1:00 S Rule Chile 1990 only - Mar 18 3:00u 0 - Rule Chile 1990 only - Sep 16 4:00u 1:00 S Rule Chile 1991 1996 - Mar Sun>=9 3:00u 0 - Rule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 S Rule Chile 1997 only - Mar 30 3:00u 0 - Rule Chile 1998 only - Sep 27 4:00u 1:00 S Rule Chile 1998 only - Mar Sun>=9 3:00u 0 - Rule Chile 1999 only - Apr 4 3:00u 0 - Rule Chile 1999 max - Oct Sun>=9 4:00u 1:00 S Rule Chile 2000 max - Mar Sun>=9 3:00u 0 - # IATA SSIM anomalies: (1992-02) says 1992-03-14; # (1996-09) says 1998-03-08. Ignore these. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Santiago -4:42:40 - LMT 1890 -4:42:40 - SMT 1910 Jan 10 # Santiago Mean Time -5:00 - CL%sT 1916 Jul 1 # Chile Time -4:42:46 - SMT 1918 Sep 10 # Santiago Mean Time -4:00 - CL%sT 1919 Jul 1 # Chile Time -4:42:46 - SMT 1927 Aug 22 # Santiago Mean Time -5:00 Chile CL%sT 1932 Sep # Chile Time -4:00 Chile CL%sT Zone Pacific/Easter -7:17:28 - LMT 1890 # Mataveri -7:17:28 - MMT 1932 Sep # Mataveri Mean Time -7:00 Chile EAS%sT 1982 Jan 18 21:00 # Easter I Time -6:00 Chile EAS%sT Note (1) Since the starting and ending of DST in 1927-1932 is a bit confusing (not covered by a decree of when it ended), I used the tz database as it was, since the first two transitions concur with the web page. It seems that the Chile web page claims that it stopped in 1928, but it doesn't mention a decree about that. Note (2) The DST employment in 1946-1947 was decreed only for the central zone (whatever that is, but surely including Santiago), not for the rest of the country. But since this happens before our cutoff date of 1970, there is no need to make an extra timezone. Note (3) Since one of the IATA anomalies were agreeing with the Chile page, I deleted that from the commentary. I also did not put commentary for if the above changes are accepted (like "Jesper Norgaard wrote ..."), I will leave that happily to whoever might implement it in a coming version of the tz database. 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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Paraguay link update
by Jesper Norgaard Welen 30 Oct '06

30 Oct '06

I contacted Carlos Raúl Perasso from Paraguay, if there was news about the expected change this Sunday to DST in Paraguay. He tells me that the originally scheduled change will happen as planned, and gave me an official link: http://www.presidencia.gov.py/decretos/D1867.pdf The link in the 'southamerica' file is outdated (that happens often), which was Steffen's link from 2004-03-05 <http://www.labor.com.py/noticias.asp?id=27>, note that also my link from 2001-03-06 is outdated: # From Jesper Norgaard (2001-03-06) [an official URL saying similar things]: # http://gateway.abc.com.py:8000/pub/pag04.mbr/artic?FHA=2001-03-03-02.24.52.9 00592 # ... # From Steffen Thorsen (2005-01-05): # Decree 1,867 (2004-03-05) <http://www.labor.com.py/noticias.asp?id=27> The new link from Carlos is also containing decree 1,867. Carlos asks me that his email information in the tz emailing list be updated to crperasso(a)gmail.com Regards, - Jesper Nørgaard Welen 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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