July 2009 - 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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corrected DST data Switzerland 1941 and 1942, final report
by Alois Treindl Aug. 25, 2011

Aug. 25, 2011

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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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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Will Samoa observe DST?
by Gwillim Law July 30, 2009

July 30, 2009

Last November, the Cabinet of (Western) Samoa approved the adoption of DST from the first Sunday of October 2009 until the last Sunday of March 2010. Alexander Krivenyshev notified the tz list on December 7, with the subject line "Western Samoa may implement Daylight Saving Time in 2009". The tzdata file hasn't reflected any such change yet. I've just done a Web search for any further news. The only relevant articles I could find were dated last November or December. Those articles speak of the change as if it were a done deal; but some of them mention that the Attorney General's office is charged with drafting the enabling legislation. Has Samoa changed its mind and dropped the project? Is the legislation just a formality that's assured of going through? It's a little more than two months until the switch is due. I hope someone on the list is in a position to check into the situation. Gwillim Law

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RE: Indiana (East) has no DST set in CLDR supplemental data
by Olson, Arthur David (NIH/NCI) [E] July 27, 2009

July 27, 2009

As Ian Davies observed, CLDR data is supplemental--not part of the time zone package. That being said... "Etc/GMT+5" would have been correct for much of Eastern Indiana through 2006 since DST wasn't observed. (Recall that there's a UNIX-heritage GMT offset sign reversal; use the commands... TZ=Etc/GMT+5 date TZ=EST date TZ=EST5 date ...to see that Etc/GMT+5 used to be the right thing.) Perhaps this particular CLDR data hasn't been updated since 2006. --ado From: Ian Davies [mailto:iand@PartyGaming.com] Sent: Monday, July 27, 2009 5:35 To: Olson, Arthur David (NIH/NCI) [E] Cc: Ian Davies Subject: Indiana (East) has no DST set in CLDR supplemental data Hi, My team has located and fixed an issue in the CLDR supplemental data for Windows TZ mapping. http://unicode.org/cldr/data/common/supplemental/supplementalData.xml Indiana (East) Mapping Changes... 1. Change the Etc/GMT+5 type which seems spurious. 2. Change the daylight flag. Original... <mapZone other="US Eastern Standard Time" type="Etc/GMT+5"/>  Updated... <mapZone other="US Eastern Standard Time" type="Indiana (East)"/>  Could you verify? Regards, Ian Ian Davies Manager, Internationalisation & Multilingual PartyGaming Suite 711 Europort, Gibraltar DD + (350) 200 78700 Ext7060 Mobile + (34) 687898027 This email and any attachments are confidential, and may be legally privileged and protected by copyright. If you are not the intended recipient dissemination or copying of this email is prohibited. If you have received this in error, please notify the sender by replying by email and then delete the email completely from your system. Any views or opinions are solely those of the sender. This communication is not intended to form a binding contract unless expressly indicated to the contrary and properly authorised. Any actions taken on the basis of this email are at the recipient's own risk.

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tzcode2009k.tar.gz and tzdata2009k.tar.gz
by Olson, Arthur David (NIH/NCI) [E] July 20, 2009

July 20, 2009

The files... ftp://elsie.nci.nih.gov/pub/tzcode2009k.tar.gz ...and... ftp://elsie.nci.nih.gov/pub/tzdata2009k.tar.gz ...are now available; these reflect the changes circulated last week on the time zone mailing list. --ado

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time zones
by Alison Hili July 16, 2009

July 16, 2009

Hi! I found your address on the internet. Could you help me please? I need to know the different in time zones between Malta and Toronto in Canada please. If in Malta it is Thursday 16th July and the time is 8.00pm, what time is in Toronto, Canada please? Thanks very much for your help. Regards, Alison.

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proposed time zone package changes
by Arthur David Olson July 14, 2009

July 14, 2009

Here are proposed time zone package changes, with summary information followed by the actual changes. If no problems are found, these will appear on the ftp site in nine days. --ado * zic.c Do not end a binary file with a POSIX-style time zone string for locations that end up in permanent DST (thanks to Andreas Schwab). * asia Arbitrarily cut off Dhaka DST at end of 2009 (so that a POSIX-style time zone string can appear in the Dhaka binary file, and for the benefit of systems with old glibc reimplementations of the time zone library that don't handle permanent DST correctly). Note that another change will be needed once the real end date for DST in Dhaka is known. * africa Change Mauritius to reflect that 2008-2009 DST experiment is not repeated (and to change end of DST in 2009 from 2:00 standard time to 2:00 local time) (thanks to Steffen Thorsen). * europe Update URL for Directive 2000/84/EC on summer-time arrangements (thanks to Colin Watson and Ian Jackson). * leapseconds Change "no leap second" comment (no leap second at end of 2009). * tz-art.htm Add notes on "A Matter of Life and Death" (thanks to Dave Cantor). * tz-link.htm Remove seemingly obsolete public.planetmirror.com/pub/timezone link (thanks to Nathan Stratton Treadway). diff -c old/africa new/africa *** old/africa Sun May 17 14:32:58 2009 --- new/africa Sat Jul 11 12:07:03 2009 *************** *** 1,5 **** # <pre> ! # @(#)africa 8.21 # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. --- 1,5 ---- # <pre> ! # @(#)africa 8.22 # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. *************** *** 502,512 **** # http://www.gov.mu/portal/goc/assemblysite/file/bill2708.pdf # </a> # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Mauritius 1982 only - Oct 10 0:00 1:00 S Rule Mauritius 1983 only - Mar 21 0:00 0 - ! Rule Mauritius 2008 max - Oct lastSun 2:00s 1:00 S ! Rule Mauritius 2009 max - Mar lastSun 2:00s 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Indian/Mauritius 3:50:00 - LMT 1907 # Port Louis 4:00 Mauritius MU%sT # Mauritius Time --- 502,534 ---- # http://www.gov.mu/portal/goc/assemblysite/file/bill2708.pdf # </a> + # From Steffen Thorsen (2009-06-05): + # According to several sources, Mauritius will not continue to observe + # DST the coming summer... + # + # Some sources, in French: + # <a href="http://www.defimedia.info/news/946/Rashid-Beebeejaun-:-%C2%AB-L%E2%80%99heu…"> + # http://www.defimedia.info/news/946/Rashid-Beebeejaun-:-%C2%AB-L%E2%80%99heu… + # </a> + # <a href="http://lexpress.mu/Story/3398~Beebeejaun---Les-objectifs-d-%C3%A9conomie-d-…"> + # http://lexpress.mu/Story/3398~Beebeejaun---Les-objectifs-d-%C3%A9conomie-d-… + # </a> + # + # Our wrap-up: + # <a href="http://www.timeanddate.com/news/time/mauritius-dst-will-not-repeat.html"> + # http://www.timeanddate.com/news/time/mauritius-dst-will-not-repeat.html + # </a> + + # From Arthur David Olson (2009-07-11): + # The "mauritius-dst-will-not-repeat" wrapup includes this: + # "The trial ended on March 29, 2009, when the clocks moved back by one hour + # at 2am (or 02:00) local time..." + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Mauritius 1982 only - Oct 10 0:00 1:00 S Rule Mauritius 1983 only - Mar 21 0:00 0 - ! Rule Mauritius 2008 only - Oct lastSun 2:00 1:00 S ! Rule Mauritius 2009 only - Mar lastSun 2:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Indian/Mauritius 3:50:00 - LMT 1907 # Port Louis 4:00 Mauritius MU%sT # Mauritius Time diff -c old/asia new/asia *** old/asia Mon Jun 15 06:43:59 2009 --- new/asia Sat Jul 11 12:07:03 2009 *************** *** 1,5 **** # <pre> ! # @(#)asia 8.35 # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. --- 1,5 ---- # <pre> ! # @(#)asia 8.36 # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. *************** *** 172,177 **** --- 172,183 ---- # # No DST end date has been announced yet. + # From Arthur David Olson (2009-07-11): + # Arbitrarily end DST at the end of 2009 so that a POSIX-sytle time zone string + # can appear in the Dhaka binary file and for the benefit of old glibc + # reimplementations of the time zone software that mishandle permanent DST. + # A change will be required once the end date is known. + # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Dhaka 6:01:40 - LMT 1890 5:53:20 - HMT 1941 Oct # Howrah Mean Time? *************** *** 180,186 **** 6:30 - BURT 1951 Sep 30 6:00 - DACT 1971 Mar 26 # Dacca Time 6:00 - BDT 2009 Jun 19 23:00 # Bangladesh Time ! 6:00 1:00 BDST # Bhutan # Zone NAME GMTOFF RULES FORMAT [UNTIL] --- 186,193 ---- 6:30 - BURT 1951 Sep 30 6:00 - DACT 1971 Mar 26 # Dacca Time 6:00 - BDT 2009 Jun 19 23:00 # Bangladesh Time ! 6:00 1:00 BDST 2010 ! 6:00 - BDT # Bhutan # Zone NAME GMTOFF RULES FORMAT [UNTIL] diff -c old/europe new/europe *** old/europe Sun May 17 14:32:59 2009 --- new/europe Sat Jul 11 12:09:02 2009 *************** *** 1,5 **** # <pre> ! # @(#)europe 8.21 # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. --- 1,5 ---- # <pre> ! # @(#)europe 8.22 # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. *************** *** 459,465 **** Rule EU 1981 max - Mar lastSun 1:00u 1:00 S Rule EU 1996 max - Oct lastSun 1:00u 0 - # The most recent directive covers the years starting in 2002. See: ! # <a href="http://europa.eu.int/eur-lex/en/lif/dat/2000/en_300L0084.html"> # Directive 2000/84/EC of the European Parliament and of the Council # of 19 January 2001 on summer-time arrangements. # </a> --- 459,465 ---- Rule EU 1981 max - Mar lastSun 1:00u 1:00 S Rule EU 1996 max - Oct lastSun 1:00u 0 - # The most recent directive covers the years starting in 2002. See: ! # <a="http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=CELEX:32000L0084:EN:N…"> # Directive 2000/84/EC of the European Parliament and of the Council # of 19 January 2001 on summer-time arrangements. # </a> diff -c old/leapseconds new/leapseconds *** old/leapseconds Sun May 17 14:32:59 2009 --- new/leapseconds Sat Jul 11 12:07:04 2009 *************** *** 1,5 **** # <pre> ! # @(#)leapseconds 8.8 # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. --- 1,5 ---- # <pre> ! # @(#)leapseconds 8.9 # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. *************** *** 56,68 **** # SERVICE DE LA ROTATION TERRESTRE # OBSERVATOIRE DE PARIS # 61, Av. de l'Observatoire 75014 PARIS (France) ! # Tel. : 33 (0) 1 40 51 22 29 # FAX : 33 (0) 1 40 51 22 91 # Internet : services.iers(a)obspm.fr # ! # Paris, 15 January 2009 # ! # Bulletin C 37 # # To authorities responsible # for the measurement and --- 56,68 ---- # SERVICE DE LA ROTATION TERRESTRE # OBSERVATOIRE DE PARIS # 61, Av. de l'Observatoire 75014 PARIS (France) ! # Tel. : 33 (0) 1 40 51 22 26 # FAX : 33 (0) 1 40 51 22 91 # Internet : services.iers(a)obspm.fr # ! # Paris, 4 July 2009 # ! # Bulletin C 38 # # To authorities responsible # for the measurement and *************** *** 70,76 **** # # INFORMATION ON UTC - TAI # ! # NO positive leap second will be introduced at the end of June 2009. # The difference between Coordinated Universal Time UTC and the # International Atomic Time TAI is : # --- 70,76 ---- # # INFORMATION ON UTC - TAI # ! # NO positive leap second will be introduced at the end of December 2009. # The difference between Coordinated Universal Time UTC and the # International Atomic Time TAI is : # *************** *** 82,87 **** # will be no time step at the next possible date. # # Daniel GAMBIS ! # Head ! # Earth Orientation Center of the IERS # Observatoire de Paris, France --- 82,87 ---- # will be no time step at the next possible date. # # Daniel GAMBIS ! # Director ! # Earth Orientation Center of IERS # Observatoire de Paris, France diff -c old/tz-art.htm new/tz-art.htm *** old/tz-art.htm Sun May 17 14:44:05 2009 --- new/tz-art.htm Sat Jul 11 12:07:04 2009 *************** *** 9,15 **** <body> <h1>Time and the Arts</h1> <address> ! @(#)tz-art.htm 8.12 </address> <p> This file is in the public domain, so clarified as of --- 9,15 ---- <body> <h1>Time and the Arts</h1> <address> ! @(#)tz-art.htm 8.13 </address> <p> This file is in the public domain, so clarified as of *************** *** 353,358 **** --- 353,369 ---- premonition in the "We Had a Dream" episode of "Medium" (originally aired 2007-02-28). </li> + <li> + In the 1946 "A Matter of Life and Death," + there is a reference to British Double Summer Time. + The time does not play a large part in the plot; + it's just a passing reference to the time when one of the + characters was supposed to have died (but didn't). + The IMDb page is at + <a href="http://us.imdb.com/title/tt0038733/"> + http://us.imdb.com/title/tt0038733/ + </a>. (Dave Cantor) + </li> </ul> <hr> <ul> diff -c old/tz-link.htm new/tz-link.htm *** old/tz-link.htm Sat Jun 6 08:27:24 2009 --- new/tz-link.htm Sat Jul 11 12:07:04 2009 *************** *** 18,24 **** <body> <h1>Sources for Time Zone and Daylight Saving Time Data</h1> <address> ! @(#)tz-link.htm 8.21 </address> <p> This file is in the public domain, so clarified as of --- 18,24 ---- <body> <h1>Sources for Time Zone and Daylight Saving Time Data</h1> <address> ! @(#)tz-link.htm 8.22 </address> <p> This file is in the public domain, so clarified as of *************** *** 114,123 **** href="ftp://elsie.nci.nih.gov/pub/tzarchive.gz">full archive of old messages</a> (in gzip compressed format), or retrieve <a href="ftp://munnari.oz.au/pub/oldtz">archived older versions of code ! and data</a>; there is also a smaller <a ! href="http://public.planetmirror.com/pub/timezone"><abbr ! title="Hypertext Transfer Protocol">HTTP</abbr> ! mirror</a>.</p> <p> The Web has several other sources for time zone and daylight saving time data. Here are some recent links that may be of interest. --- 114,120 ---- href="ftp://elsie.nci.nih.gov/pub/tzarchive.gz">full archive of old messages</a> (in gzip compressed format), or retrieve <a href="ftp://munnari.oz.au/pub/oldtz">archived older versions of code ! and data</a>.</p> <p> The Web has several other sources for time zone and daylight saving time data. Here are some recent links that may be of interest. diff -c old/zic.c new/zic.c *** old/zic.c Mon Apr 20 16:17:54 2009 --- new/zic.c Sat Jul 11 12:07:04 2009 *************** *** 3,9 **** ** 2006-07-17 by Arthur David Olson. */ ! static char elsieid[] = "@(#)zic.c 8.19"; #include "private.h" #include "locale.h" --- 3,9 ---- ** 2006-07-17 by Arthur David Olson. */ ! static char elsieid[] = "@(#)zic.c 8.20"; #include "private.h" #include "locale.h" *************** *** 1921,1927 **** if (stdrp != NULL && stdrp->r_hiyear == 2037) return; } ! if (stdrp == NULL && zp->z_nrules != 0) return; abbrvar = (stdrp == NULL) ? "" : stdrp->r_abbrvar; doabbr(result, zp->z_format, abbrvar, FALSE, TRUE); --- 1921,1927 ---- if (stdrp != NULL && stdrp->r_hiyear == 2037) return; } ! if (stdrp == NULL && (zp->z_nrules != 0 || zp->z_stdoff != 0)) return; abbrvar = (stdrp == NULL) ? "" : stdrp->r_abbrvar; doabbr(result, zp->z_format, abbrvar, FALSE, TRUE);

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Time zone data for Dhaka is missing an end date
by nikolaus_brauer＠us.ibm.com July 9, 2009

July 9, 2009

To whom it may concern, I am writing to report an issue I have discovered in the recent change to the Asia/Dhaka time zone data, which recently implemented daylight saving time in June. The recent update to the time zone data (tzdata2009j) includes a start date for daylight saving time, but no end date. Intuitively, daylight saving time should have a start and an end date within the same year, otherwise what is implemented is an indefinite GMT offset change. Because of this programs that detect DST rules may see the absence of an end to the DST period as an error. This may cause programs which obtain DST rules using Olson time zone data to fail to detect daylight saving time rules for Asia/Dhaka. For completeness, I propose a tentative end date be implemented now, and an updated date be implemented once an official date is released, or the government releases an additional tentative date in September. According to timeanddate.com: "The press secretary did not confirm the length of DST but stated that the government would decide the DST end date and would announce it later. On another note, Bangladesh's minister for power said earlier in 2009 that the new timing might continue until the end of September. Timeanddate.com will provide an update on the DST end date when it becomes available. " ( http://www.timeanddate.com/news/time/bangladesh-daylight-saving-2009.html ): Timeanddate.com picked September 25th, which seems like a likely enough date. I have update the tzdata on my system with the following rules to implement this change. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Dhaka09 2009 max - Jun 19 23:00 1:00 D Rule Dhaka09 2009 max - Sep 26 00:00 0:00 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Dhaka 6:01:40 - LMT 1890 5:53:20 - HMT 1941 Oct # Howrah Mean Time? 6:30 - BURT 1942 May 15 # Burma Time 5:30 - IST 1942 Sep 6:30 - BURT 1951 Sep 30 6:00 - DACT 1971 Mar 26 # Dacca Time 6:00 Dhaka09 B%sT # Bangladesh Time Could you please evaluate this change for inclusion in the Olson time zone data? Please let me know if you have any questions or concerns. Thanks, Nik

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Bangladesh DST end
by ravi-iyer.v＠nokia.com July 7, 2009

July 7, 2009

Hi there, I downloaded tzdata2009j and it does not seem to have the DST end for Bangladesh. I saw couple of threads related to this saying that the end time was still not announced by the Bangladesh government. Is that still the case? Because I can see that timeanddate.com already shows that DST ends on 25th Sep at 12:00am. If this information is correct, when can we expect to see a new version of the database? Regards, Ravi

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