August 2010 - 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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Hong Kong problem and BCN timezone(s)
by Jesper Nørgaard 20 Sep '11

20 Sep '11

I have found a small problem in the Hong Kong corrections of 2009q. It seems that the Hong Kong government page says that DST was not used in 1977 and 1978, while this is the current tz data: Rule HK 1965 1977 - Apr Sun>=16 3:30 1:00 S Rule HK 1965 1977 - Oct Sun>=16 3:30 0 - Indeed the whole extract of the government web page is still part of the asia file. I would suggest it should be like this Rule HK 1965 1976 - Apr Sun>=16 3:30 1:00 S Rule HK 1965 1976 - Oct Sun>=16 3:30 0 - My other question concerns the timezone America/Santa_Isabel. It seems that several sources imply that all of Baca California Norte is on the same timezone http://www.frontera.info/EdicionEnlinea/Notas/Noticias/13032010/435414.aspx http://www.notisistema.com/noticias/?p=251578 http://www.timeanddate.com/news/time/north-mexico-dst-change.html This is far from authoritative, but at least and indication that BCN might be one single timezone. I wonder if there has been any confirmation of the Santa Isabel timezone in BCN? I am not saying it is not there, I just haven't found any confirmation of it. - Jesper Norgaard Welen

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corrected DST data Switzerland 1941 and 1942, final report
by Alois Treindl 25 Aug '11

25 Aug '11

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 19 May '11

19 May '11

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 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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FW: Revisiting Australian time zone abbreviations
by Olson, Arthur David (NIH/NCI) [E] 16 Feb '11

16 Feb '11

I'm (trepidatiously) forwarding this message from Richard Stanway, who is not on the time zone mailing list. Those of you who are on the list, please direct replies appropriately. --ado From: Richard Stanway [mailto:r.stanway@gmail.com] Sent: Sunday, June 13, 2010 5:49 To: tz(a)lecserver.nci.nih.gov Subject: Revisiting Australian time zone abbreviations Hello, I came across this mailing list while researching a time zone issue on our website which indirectly makes use of the zoneinfo. We localize some timestamps to the visitors time zone, but the site is trafficked by a predominately US audience where the abbreviation "EST" is used quite often. It is difficult for an Australian visitor to realize that the times they are seeing have been localized since they show for example as "8pm EST" due to the abbreviations used for the Australian time zones, leading to confusion as to whether it is US EST or AU EST. The last discussion on AEST vs EST seems to be about 9 years old and I figured it was time to revisit the subject now that there seems to be an official source. The government website of Australia states the time zone names for Australia are Australian Eastern Standard Time (AEST), Australian Central Standard Time (ACST) and Australian Western Standard Time (AWST) with Australian Eastern Daylight Time (AEDT) and Australian Central Daylight Time (ACDT) when observing daylight saving time. Reference: http://australia.gov.au/about-australia/our-country/time Any chance of these official names making it into a zoneinfo update?

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FW: Morroco studies a TZ core change due to Ramadan
by Olson, Arthur David (NIH/NCI) [E] 05 Sep '10

05 Sep '10

I'm forwarding this message from Sébastien Willemijns, 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: Sébastien WILLEMIJNS [mailto:sebastien@willemijns.com] Sent: Wednesday, August 18, 2010 4:51 To: tz(a)lecserver.nci.nih.gov Subject: Morroco studies a TZ core change due to Ramadan http://www.yabiladi.com/articles/details/3089/maroc-l-heure-d-ete-serait- elle-appliquee.html

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factory zone abbreviation
by Zefram 26 Aug '10

26 Aug '10

(I'm not on the mailing list. Please CC me on replies.) The `abbreviation' for the Factory timezone isn't valid for a TZ variable specification. I have discovered this because I have a tzfile parser in Perl that follows POSIX rules strictly for the TZ-format rule part, and I've started applying it systematically to the Olson database. This is the only zone that it has a problem with. The POSIX rules for TZ, as described in the Theory file and available online at <http://www.opengroup.org/onlinepubs/000095399/basedefs/ xbd_chap08.html> among other places, prohibit spaces in the abbreviations. Factory's abbreviation is a sentence with words separated by spaces. I see it's grandfathered past zic's test for POSIX validity, but the intent behind that seems to be more about the length than about the spaces. I don't have a problem with the length: my code doesn't impose any fixed length limit. (POSIX allows implementations to limit the length to six bytes or higher, but doesn't oblige them to.) You could fix this by changing the spaces to dashes. The result is POSIX-valid, and also avoids violating the expectations of naive parsers of date(1) output that expect the timezone abbreviation to be just one word. The downside is that it slightly impairs readability to humans. POSIX systems are also still allowed to object to it if they do impose a small TZNAME_MAX. What are your thoughts? -zefram

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Rules for Asia/Tokyo and Asia/Karachi
by Joachim Wieland 23 Aug '10

23 Aug '10

Hi, I am trying to understand the database file format and have a question regarding the rule definition of Asia/Tokyo and Asia/Karachi. Both time zones seem to be valid but I cannot see that from their definition in the database. Let's look at Asia/Tokyo only, but Asia/Karachi is similar... # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Japan 1948 only - May Sun>=1 2:00 1:00 D Rule Japan 1948 1951 - Sep Sat>=8 2:00 0 S Rule Japan 1949 only - Apr Sun>=1 2:00 1:00 D Rule Japan 1950 1951 - May Sun>=1 2:00 1:00 D # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Tokyo 9:18:59 - LMT 1887 Dec 31 15:00u 9:00 - JST 1896 9:00 - CJT 1938 9:00 Japan J%sT So Asia/Tokyo references the ruleset "Japan" which is only defined for the years 1948 - 1951. Wouldn't that mean that Asia/Tokyo is only valid during those years? Especially, it references a substring with "J%sT", where does this substring come from for any other year? Thanks a lot, Joachim

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Shouldn't Kemerovo oblast' use OMST/OMSST timezone abbreviation?
by Petr Machata 23 Aug '10

23 Aug '10

... given the time offset it could be either that, or NOVT that tzdata currently uses. But Wikipedia lists Kemerovo under Omsk Time: http://en.wikipedia.org/wiki/Kemerovo_Oblast http://en.wikipedia.org/wiki/Omsk_Time http://ru.wikipedia.org/wiki/Новокузнецк One one reference outside of obvious Wikipedia copies: http://www.vk-ugoll.ru/index.php?option=com_content&view=article&id=82&Item… Though I was unable to find anything official. Petr Machata

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