- tz - lists.iana.org

Why does localtime() call tzset() but localtime_r() not?
by Jonathan Leffler Jan. 11, 2008

Jan. 11, 2008

Actually, the subject pretty much says it all. In tzcode2007k (also in 2007h), the code in localtime.c is: struct tm * localtime(const time_t *const timep) { tzset(); return localsub(timep, 0L, &tm); } struct tm * localtime_r(const time_t *const timep, struct tm *tmp) { return localsub(timep, 0L, tmp); } I can't immediately see a justification for the asymmetry in the POSIX specification of these functions, but I could be missing something. -- Jonathan Leffler <jonathan.leffler(a)gmail.com> #include <disclaimer.h> Guardian of DBD::Informix - v2007.0914 - http://dbi.perl.org "Blessed are we who can laugh at ourselves, for we shall never cease to be amused."

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SunOS and timelocal, timegm, tzsetwall
by Jonathan Leffler Jan. 10, 2008

Jan. 10, 2008

In Makefile (for tzcode2007k), there are the comments: # Sun has provided "tzsetwall", "timelocal", and "timegm" in SunOS 4.0. # These functions may well disappear in future releases of the time # conversion package. For Solaris 8 (SunOS 5.8) and Solaris 10 (SunOS 5.10), neither the standard C library nor any other shared library in /lib or /usr/lib defines or references tzsetwall, timelocal or timegm -- the functions no longer exist in Solaris. I was checking on SPARC rather than Intel, but I would not expect that to matter in practice. You can, however, find references for these functions for Solaris 2.5 (aka SunOS 5.5) and Solaris 2.6 (SunOS 5.6) if you Google "site:sun.comtzsetwall" - ( 2.5: http://docs.sun.com/app/docs/doc/802-1930-03/6i5u95utq?a=view; 2.6: http://docs.sun.com/app/docs/doc/802-5747-03/6i9g1bha0?l=ko&a=view) Interestingly, there is a Solaris 8 manual page ( http://docs.sun.com/app/docs/doc/806-0627/6j9vhfn9n?l=ko&a=view) that mentions tzsetwall (but not timegm or timelocal), but I still can't find the function in any of the shared libraries on a representative Solaris 8 machine. There is a 'Solaris 8 Transition Guide' at http://docs.sun.com/app/docs/doc/805-6331/6j5vgg6bv?a=view which mentions all three - describing their replacements. -- Jonathan Leffler <jonathan.leffler(a)gmail.com> #include <disclaimer.h> Guardian of DBD::Informix - v2007.0914 - http://dbi.perl.org "Blessed are we who can laugh at ourselves, for we shall never cease to be amused."

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The Timezones are Incorrectly Encoded
by Fred Fang Jan. 8, 2008

Jan. 8, 2008

http://www.php.net/manual/en/timezones.america.php For example, the wiki says "America/Los Angeles" rather than "America/Los_Angeles". Thanks! Fred

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Theory file mentions CCME - CC3E is now available
by Jonathan Leffler Jan. 6, 2008

Jan. 6, 2008

In the distribution of the Olson database, the Theory file mentions "Calendrical Calculations, Millennium Edition" from 2001. There is a new edition of the book available now: Calendrical Calculations, 3rd Edn. 2008 Nachum Dershowitz, Edward M Reingold Cambridge University Press ISBN 978-0-521-88540-9 (hardback) ISBN 978-0-521-70238-6 (paperback) Web sites: http://www.cambridge.org/9780521885409 http://www.calendarists.org/ (Note: the latter web site does not mention the 3rd Edn as of 2008-01-06; I'm not clear whether it will be updated to do so. It does have an extensive set of errata for CCME on it.) -- Jonathan Leffler <jonathan.leffler(a)gmail.com> #include <disclaimer.h> Guardian of DBD::Informix - v2007.0914 - http://dbi.perl.org "Blessed are we who can laugh at ourselves, for we shall never cease to be amused."

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Shapefile for Olson time zone names
by Mark Shuttleworth Jan. 2, 2008

Jan. 2, 2008

Hi folks I'm trying to map from latitude and longitude to Olson time zone names, and haven't had any luck locating the relevant data. Does anyone know of an existing data set, in any format which I could ultimately get into PostGIS (Shapefile, or PostGIS, or anything similar), which would serve this purpose? If anyone is interested in helping to create such a data set I did find a potential starting point: this data set from BBN which is old (2002) and only maps to the UTC time offsets (+1, +2 etc): http://openmap.bbn.com/data/shape/timezone/ I would love to see such a data set becoming a standard part of the ZoneInfo repository, updated in an open fashion. If some funding would help to get that started, I'll gladly entertain proposals. Mark

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tzcode2007k.tar.gz and tzdata2007k.tar.gz
by Olson, Arthur David (NIH/NCI) [E] Dec. 31, 2007

Dec. 31, 2007

The files... ftp://elsie.nci.nih.gov/pub/tzcode2007k.tar.gz ...and... ftp://elsie.nci.nih.gov/pub/tzdata2007k.tar.gz ...are now available; these reflect the changes circulated last week on the time zone mailing list (most importantly, changes to the "southamerica" file based on Argentina's readoption of daylight saving time. --ado

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Argentina DST is law
by Jesper Norgaard Welen Dec. 28, 2007

Dec. 28, 2007

The last hurdle of Argentina DST is over, the proposal was approved in the lower chamber too (Deputados) with a vote 192 for and 2 against. By the way thanks to Mariano Absatz and Daniel Mario Vega for the link to the original scanned proposal, where the dates and the zero hours are clear and unambiguous. I should have tried the Send/Receive button first before complaining to the tz mailing list! This is the article about final approval: http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996 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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southamerica source file patch (Argentina summer 2008 DST)
by Martin Chikilian Dec. 28, 2007

Dec. 28, 2007

Hello, i send you bellow a diff file containing changes to file southamerica, that changes reflects new Law 26350 approved by Argentinian Congress on 2007-12-26. The Law itself is about Daylight Saving Time at summer 2008, you can see the official bulletin at http://www.boletinoficial.gov.ar/. --- southamerica.orig 2007-12-03 11:50:41.000000000 -0300 +++ southamerica 2007-12-28 10:05:35.000000000 -0300 @@ -107,6 +107,11 @@ Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 S Rule Arg 2000 only - Mar Sun>=1 0:00 0 - # +# Law 26350 approved by Argentinian Congress (2007-12-26) +# http://www.boletinoficial.gov.ar/ +Rule Arg 2007 only - Dec 30 0:00 1:00 S +Rule Arg 2008 only - Mar 16 0:00 0 - +# # From Peter Gradelski via Steffen Thorsen (2000-03-01): # We just checked with our Sao Paulo office and they say the government of # Argentina decided not to become one of the countries that go on or off DST. @@ -237,6 +242,8 @@ -4:00 - WART 1991 Oct 20 -3:00 Arg AR%sT 1999 Oct 3 -4:00 Arg AR%sT 2000 Mar 3 + -3:00 Arg AR%sT 2007 Dec 30 + -3:00 Arg AR%sT 2008 Mar 16 -3:00 - ART # # Tucuman (TM) Regards, Martin Chikilian Communication Partner S.R.L.

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tzdata modification
by Eduardo A. Suárez Dec. 27, 2007

Dec. 27, 2007

Hi, I don't know if this is right, could you help me? Sun Dec 30th 2007 we go GMT-0200, Sun Mar 16th 2008 we return GMT-0300 # Rule Arg 2007 only - Dec 30 0:00 1:00 S Rule Arg 2008 only - Mar 16 0:00 0 - # ... # Buenos Aires (BA), Capital Federal (CF), Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31 -4:16:48 - CMT 1920 May # Cordoba Mean Time -4:00 - ART 1930 Dec -4:00 Arg AR%sT 1969 Oct 5 -3:00 Arg AR%sT 1999 Oct 3 -4:00 Arg AR%sT 2000 Mar 3 -2:00 Arg AR%sT 2007 Dec 30 -3:00 Arg AR%sT 2008 Mar 16 -3:00 - ART # Thanks, Eduardo.- ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program.

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Argentina adopts DST again
by Steffen Thorsen Dec. 27, 2007

Dec. 27, 2007

A user (Leonardo Chaim) reported that Argentina will adopt DST, and I have found more details on Argentina's presidential web site, as well as on many news sites. Argentina will advance clocks by one hour on 2007-12-30 00:00 to (01:00) and turn them back again on 2008-03-16 00:00 (to 23:00). It appears that all of the country (all Zone-entries) are affected. The official news report about it: (Spanish) http://www.casarosada.gov.ar/index.php?option=com_content&task=view&id=1509… which has a link to the "Comunicado"/official notice: http://www.casarosada.gov.ar/index.php?option=com_content&task=view&id=1510 translated: "The measurement will prevail in all the national territory as of the 00:00 hour of Sunday 30 of December of the present year, until the 00:00 hour of Sunday 16 of March of 2008, in that the clocks will have to retard one hour as a result of the application of the winter schedule. " News reports like http://www.lanacion.com.ar/opinion/nota.asp?nota_id=973037 indicate that Argentina will use DST next year as well, from October to March, although exact rules are not given. Best regards, Steffen / timeanddate.com

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