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tz update?
by Ryan Kennedy Nov. 3, 2004

Nov. 3, 2004

Hello, I just have a quick question I am hoping someone can help me out with. I am trying to find a way out that I can be notified when the TZ data gets changed/updated. Or if there's nothing like that, is there a site I can visit that will give me that information? thank you, Ryan Kennedy Ryan Kennedy Sayson Tech. Ryan.Kennedy(a)sayson.com

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Chinese local time
by Komka Péter Nov. 3, 2004

Nov. 3, 2004

For China (all territories) the zone line (perhaps) should look like..: # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/China 8:00 - CST Source: http://en.wikipedia.org/wiki/Daylight_saving_time

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RE: difftime
by Olson, Arthur David (NIH/NCI) Nov. 2, 2004

Nov. 2, 2004

Yet another iteration on difftime.c. --ado /* ** This file is in the public domain, so clarified as of ** 1996-06-05 by Arthur David Olson (arthur_david_olson(a)nih.gov) */ #ifndef lint #ifndef NOID static char elsieid[] = "%W%"; #endif /* !defined NOID */ #endif /* !defined lint */ /*LINTLIBRARY*/ #include "sys/types.h" /* for time_t */ #include "private.h" /* for TYPE_INTEGRAL and TYPE_SIGNED */ double difftime(time1, time0) const time_t time1; const time_t time0; { /* ** If (sizeof (double) > sizeof (time_t)) simply convert and subtract ** (assuming that the wider type has more precision). ** This is the common real-world case circa 2004. */ if (sizeof (double) > sizeof (time_t)) return (double) time1 - (double) time0; if (!TYPE_INTEGRAL(time_t)) { /* ** time_t is floating. */ return time1 - time0; } if (!TYPE_SIGNED(time_t)) { /* ** time_t is integral and unsigned. ** The difference of two unsigned values can't overflow ** if the minuend is greater than or equal to the subtrahend. */ if (time1 >= time0) return time1 - time0; else return -((double) (time0 - time1)); } /* ** time_t is integral and signed. ** Handle cases where both time1 and time0 have the same sign ** (meaning that their difference cannot overflow). */ if (time1 >= 0 && time0 >= 0 || time1 < 0 && time0 < 0) return time1 - time0; /* ** time1 and time0 have opposite signs. ** Punt if unsigned long is too narrow. */ if (sizeof (unsigned long) < sizeof (time_t)) return (double) time1 - (double) time0; /* ** Stay calm...decent optimizers will eliminate the complexity below. */ if (time1 >= 0 /* && time0 < 0 */) return (unsigned long) time1 + (unsigned long) (-(time0 + 1)) + 1; return -(double) ((unsigned long) time0 + (unsigned long) (-(time1 + 1)) + 1); }

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Olso city
by Jesper Norgaard Welen Nov. 1, 2004

Nov. 1, 2004

There is a spelling mistake in the 'europe' file, where 'Olso' should be 'Oslo' (the capital of Norway). Maybe because Arthur David Olson was also mentioned in the file!? 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 (5) 58-04-20-04 ext. 1374 Fax: +52 (5) 58-04-75-58 Tel. Casa: 53-10-05-95 ó 53-10-97-78 Download the free program World Time Explorer, I made: http://www.cimmyt.org/timezone/index.htm

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FW: Time Zone change in GEORGIA (Eastern Europe), time zone is no w GMT+3 (no longer GMT+4)
by Olson, Arthur David (NIH/NCI) Oct. 30, 2004

Oct. 30, 2004

Aiet Kolkhi is not on the time zone mailing list; direct replies appropriately. The change of Georgia to GMT+3 is already reflected in tzdata2004e.tar.gz; the suggested move of Georgia to Europe from Asia is not. --ado -----Original Message----- From: Aiet Kolkhi [mailto:aiet@qartuli.net] Sent: Sunday, October 24, 2004 4:39 PM To: tz(a)lecserver.nci.nih.gov Subject: Time Zone change in GEORGIA (Eastern Europe), time zone is now GMT+3 (no longer GMT+4) Hello, There has been a time zone change in GEORGIA (capital: Tbilisi). Georgia used to be a GMT+4 country, with DST rules just like Berlin or Paris, but since June 27, 2004, the newly-elected Parliament chose to set national time GEST one hour erlier, just like it was in the old days. As a result, the timzone Georgia belongs is GMT+3 (+1 hour during Daylight Saiving Times, just like it is now). DST rules remain, i.e. DST starts on March 28 and ends on Oct. 31. You may read BBC story about the change here: http://news.bbc.co.uk/1/hi/world/europe/3843511.stm Also, the information has been already corrected at timeanddate.com Here is the link to Tbilisi, Georgia: http://www.timeanddate.com/worldclock/city.html?n=371 Another important notice: It would be more proper and politically correct to list Georgia in (East) Europe section and not in Asia. Georgia was considered Asian country due to improper information during Soviet times, but since the break-up of the Soviet, Georgia tends to be included in Europe rather than in Asia in more and more places. The BBC link I provided above for example also includes Georgia in Europian region. It is correct, since Georgia has always been more Europian country than Asian, with Christian religion since 4th AD and Europian traditions. Georgia is also a member of Europian Council and the EU flag is hanging next to the Georgian flag in front of Georgian Parliament :) Please CC any inquiries/replies regarding this matter DIRECTLY to my address, as I'm not subscribed to this list. Thank you. -- Best regards, Aiet Kolkhi mailto:aiet@qartuli.net http://aiet.qartuli.net

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Cuba on DST until 2005
by Steffen Thorsen Oct. 29, 2004

Oct. 29, 2004

Not to interrupt your discussion about Georgia, but... Evert van der Veer <evert.van.der.veer(a)wanadoo.nl> informed me that Cuba was not going back to standard time this year. I was able to find a news arcticle about it, quoted: > To conserve energy, Cuban authorities are closing 110 businesses, > shortening the workday and school day by a half hour, extending > daylight-saving time until October 2005 and shifting production > schedules. The original (subscription) is in the Dallas Morning News from 2004-10-14: http://www.dallasnews.com/sharedcontent/dws/news/world/cuba/stories/101504d… A number of other newspapers carry the same article without subscription, including http://www.kansas.com/mld/kansas/news/world/9920684.htm regards, Steffen

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Time Zone change in GEORGIA (Eastern Europe), time zone is now GMT+3 (no longer GMT+4)
by Aiet Kolkhi Oct. 24, 2004

Oct. 24, 2004

Hello, There has been a time zone change in GEORGIA (capital: Tbilisi). Georgia used to be a GMT+4 country, with DST rules just like Berlin or Paris, but since June 27, 2004, the newly-elected Parliament chose to set national time GEST one hour erlier, just like it was in the old days. As a result, the timzone Georgia belongs is GMT+3 (+1 hour during Daylight Saiving Times, just like it is now). DST rules remain, i.e. DST starts on March 28 and ends on Oct. 31. You may read BBC story about the change here: http://news.bbc.co.uk/1/hi/world/europe/3843511.stm Also, the information has been already corrected at timeanddate.com Here is the link to Tbilisi, Georgia: http://www.timeanddate.com/worldclock/city.html?n=371 Another important notice: It would be more proper and politically correct to list Georgia in (East) Europe section and not in Asia. Georgia was considered Asian country due to improper information during Soviet times, but since the break-up of the Soviet, Georgia tends to be included in Europe rather than in Asia in more and more places. The BBC link I provided above for example also includes Georgia in Europian region. It is correct, since Georgia has always been more Europian country than Asian, with Christian religion since 4th AD and Europian traditions. Georgia is also a member of Europian Council and the EU flag is hanging next to the Georgian flag in front of Georgian Parliament :) Please CC any inquiries/replies regarding this matter DIRECTLY to my address, as I'm not subscribed to this list. Thank you. -- Best regards, Aiet Kolkhi mailto:aiet@qartuli.net http://aiet.qartuli.net

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Using tz as linked libraries
by Wendel Schultz Oct. 22, 2004

Oct. 22, 2004

Has anybody had any success linking to the libraries and using these functions? Any sample programs that illustrate this? Also, is it better to build this under Cygwin or use MS VC++ to compile?

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difftime
by Olson, Arthur David (NIH/NCI) Oct. 21, 2004

Oct. 21, 2004

So...can we apply our hard-earned knowledge of modular arithmetic to the task of getting difftime to do the right thing in the face of the various types that time_t is allowed to assume? A possibility would be to add to private.h... ------- private.h ------- *** /tmp/geta29733 Thu Oct 21 10:29:48 2004 --- /tmp/getb29733 Thu Oct 21 10:29:48 2004 *************** *** 21,27 **** #ifndef lint #ifndef NOID ! static char privatehid[] = "@(#)private.h 7.54"; #endif /* !defined NOID */ #endif /* !defined lint */ --- 21,27 ---- #ifndef lint #ifndef NOID ! static char privatehid[] = "@(#)private.h 7.55"; #endif /* !defined NOID */ #endif /* !defined lint */ *************** *** 238,243 **** --- 238,247 ---- #define TYPE_SIGNED(type) (((type) -1) < 0) #endif /* !defined TYPE_SIGNED */ + #ifndef TYPE_INTEGRAL + #define TYPE_INTEGRAL(type) (((type) 0.4) == 0) + #endif /* !defined TYPE_INTEGRAL */ + #ifndef INT_STRLEN_MAXIMUM /* ** 302 / 1000 is log10(2.0) rounded up. ...and then use the difftime.c that appears below. --ado /* ** This file is in the public domain, so clarified as of ** June 5, 1996 by Arthur David Olson (arthur_david_olson(a)nih.gov) */ #ifndef lint #ifndef NOID static char elsieid[] = "@(#)difftime.c 7.11"; #endif /* !defined NOID */ #endif /* !defined lint */ /*LINTLIBRARY*/ #include "sys/types.h" /* for time_t */ #include "private.h" /* for TYPE_INTEGRAL and TYPE_SIGNED */ double difftime(time1, time0) const time_t time1; const time_t time0; { if (!TYPE_INTEGRAL(time_t)) { /* ** time_t is floating. ** We can't apply % to floats. ** Do the math in whichever of time_t or double is wider. */ if (sizeof (time_t) >= sizeof (double)) return time1 - time0; else return (double) time1 - (double) time0; } else { /* ** time_t is integral. ** As elsewhere in the time zone package, ** use modular arithmetic to avoid overflow. */ register time_t lead; register time_t trail; lead = time1 / 2 - time0 / 2; trail = time1 % 2 - time0 % 2; return 2 * ((double) lead) + trail; } }

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Tzcode2004f.tar.gz
by Olson, Arthur David (NIH/NCI) Oct. 21, 2004

Oct. 21, 2004

The file... ftp://elsie.nci.nih.gov/pub/tzcode2004f.tar.gz ...is now available; this includes the changes circulated earlier on the list to cope with wide-ranging tm_year values. --ado

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