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Australian timezone on Linux
by Girish Hilage Jan. 1, 2009

Jan. 1, 2009

Hi, I have a problem setting the Australian DST timezone on my Fedora Core 8 system. When DST starts it is able to advance the time by an hour but the time does not wind back by an hour while DST ends. I am using timezone "South Australia". DST start : [girish@mymachine Australia]$ date Sun Oct 5 01:59:57 CST 2008 [girish@mymachine Australia]$ date Sun Oct 5 01:59:58 CST 2008 [girish@mymachine Australia]$ date Sun Oct 5 03:00:00 CST 2008 [girish@mymachine Australia]$ date Sun Oct 5 03:00:03 CST 2008 DST end : [girish@mymachine Australia]$ date Sun Apr 5 02:59:57 CST 2009 [girish@mymachine Australia]$ date Sun Apr 5 02:59:59 CST 2009 [girish@mymachine Australia]$ date Sun Apr 5 03:00:01 CST 2009 [girish@mymachine Australia]$ date Sun Apr 5 03:00:02 CST 2009 This is also not working for Apr 6 08. Is there any reason why is it not working properly? Regards, Girish DISCLAIMER ========== This e-mail may contain privileged and confidential information which is the property of Persistent Systems Ltd. It is intended only for the use of the individual or entity to which it is addressed. If you are not the intended recipient, you are not authorized to read, retain, copy, print, distribute or use this message. If you have received this communication in error, please notify the sender and delete all copies of this message. Persistent Systems Ltd. does not accept any liability for virus infected mails.

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FW: New Location request
by Olson, Arthur David (NIH/NCI) [E] Dec. 30, 2008

Dec. 30, 2008

I'm forwarding this message from Marek Hajduczenia, who is not on the time zone mailing list. Those of you who are on the list, please direct replies appropriately. MH: there's already a GMT-12 binary in the distributed version of the package; it is named "Etc/GMT-12." But using the name "GMT-12" should do what you want on the largest number of computers. --ado -----Original Message----- From: Marek Hajduczenia [mailto:marek_haj@2com.pl] Sent: Tuesday, December 23, 2008 2:42 To: 'Paul Eggert'; tz(a)lecserver.nci.nih.gov Subject: RE: FW: New Location request Hi Paul, Thank You for the answer. GMT-12 hrs would resolve the problem since I need to track time and day. It is critical since the ballots close e.g. xx.xx.2009 at 11.59 AOE, so that way I can trace what day and what hour is in Howland Island time zone. If Howland Island is not a good location, please add simply GMT-12 and provide the name as AOE (Anywhere On Earth reference). Is that possible ? Regards Marek Hajduczenia -----Original Message----- From: Paul Eggert [mailto:eggert@CS.UCLA.EDU] Sent: segunda-feira, 22 de Dezembro de 2008 23:17 To: tz(a)elsie.nci.nih.gov Cc: marek_haj(a)2com.pl Subject: Re: FW: New Location request > From: Marek Hajduczenia [mailto:marek_haj@2com.pl] > Sent: Saturday, December 20, 2008 3:30 > I am writing to You with a small request. Is it possible to add one > location to time zone data base app i.e. Howland Island (see: > http://www.worldtimezone.com/time/wtzresult.php?CiID=42242) It is > used heavily in IEEE ballots as the Anywhere On Earth time locator and > it would be nice to have. Me and my colleagues use various plugins > which in turns use this data base for reference and currently this > location is not available. I do realize that this is not an inhabited > island though there is some point of merit in adding it to the > list. Alternatively, adding any location which has GMT-12 hrs would be > of use, no matter what the name is. It would be most useful for IEEE > community (I am speaking here as its member only). Would TZ='Etc/GMT+12' solve your problem? As far as we know, Howland was using Hawaii War Time (9.5 hours behind UTC) the last time that it was inhabited, so I'm afraid it's not a good representative for the zone that is 12 hours behind UTC.

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question about Argentina 1946 - 1963
by Alois Treindl Dec. 29, 2008

Dec. 29, 2008

In the Argentina timezone rules I find a strange fact: continuous DST from Oct 1946 to Oct 1963. The rules are: Rule Arg 1946 only - Mar 1 0:00 0 - Rule Arg 1946 only - Oct 1 0:00 1:00 S Rule Arg 1963 only - Oct 1 0:00 0 - Rule Arg 1963 only - Dec 15 0:00 1:00 S There are no other rules affecting the years 1946 or 1963 or any year in between. This means that Argentina was continuously on DST. Is this really correct, and what are the sources for that?

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FW: New Location request
by Olson, Arthur David (NIH/NCI) [E] Dec. 23, 2008

Dec. 23, 2008

I'm forwarding this message from Marek Hajduczenia, who is not on the time zone mailing list. Those of you who are on the list, please direct replies appropriately. --ado From: Marek Hajduczenia [mailto:marek_haj@2com.pl] Sent: Saturday, December 20, 2008 3:30 To: tz(a)lecserver.nci.nih.gov Subject: New Location request Dear Sir/Madam, I am writing to You with a small request. Is it possible to add one location to time zone data base app i.e. Howland Island (see: http://www.worldtimezone.com/time/wtzresult.php?CiID=42242) It is used heavily in IEEE ballots as the Anywhere On Earth time locator and it would be nice to have. Me and my colleagues use various plugins which in turns use this data base for reference and currently this location is not available. I do realize that this is not an inhabited island though there is some point of merit in adding it to the list. Alternatively, adding any location which has GMT-12 hrs would be of use, no matter what the name is. It would be most useful for IEEE community (I am speaking here as its member only). If You have any comments, please let me know. Kindest regards Marek Hajduczenia

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tzdata for Switzerland 1940 - 1942 probably incorrect - PS
by Alois Treindl Dec. 16, 2008

Dec. 16, 2008

I forgot to correct the begin times. These must be according to the meteorological federal office: The rules 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 - or made explicit for these two years, 1941 and 1942. The rule for 1940 must be deleted. Best regards Alois Treindl -- || Dr. 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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tzdata for Switzerland 1940 - 1942 probably incorrect
by Alois Treindl Dec. 15, 2008

Dec. 15, 2008

Hello tzdata currently has these rules for Switzerland: # From Whitman (who writes ``Midnight?''): Rule Swiss 1940 only - Nov 2 0:00 1:00 S Rule Swiss 1940 only - Dec 31 0:00 0 - # From Shanks & Pottenger: Rule Swiss 1941 1942 - May Sun>=1 2:00 1:00 S Rule Swiss 1941 1942 - Oct Sun>=1 0:00 0 - These are most likely incorrect. I have been practicing astrology in Switzerland since 1980 (in recent years running the website www.astro.com) and have never come upon any source which claimed DST in Switzerland for 1940. A current source is for example metas.ch/metasweb/Themen/sommerzeit;internal which is the Federal office for meteorology. This page has (near the bottom) Sommerzeit 1941 bis 1942 Bei Beginn wurden die Uhren von 01:00 auf 02:00 Uhr vorgestellt und am Ende entsprechend von 02:00 auf 01:00 h zurückgestellt. (begin at 1 am, clocks shifted to 2am; end 2am, clocks shifted to 1 am) 1942 begin 4. Mai end 5. Oktober 1941 begin 5. Mai end 6. Oktober This is what Shanks has in the International Atlas, all editions. He is wrongly quoted in tzdata. 5 may 1941 is a monday, 6 Oct 1942 is a monday. 4 may 1942 and 5 Oct 1942 are also mondays. The rules must either be changed to Rule Swiss 1941 1942 - May Mon>=1 2:00 1:00 S Rule Swiss 1941 1942 - Oct Mon>=1 0:00 0 - or made explicit for these two years, 1941 and 1942. The rule for 1940 must be deleted. Best regards Alois Treindl -- || Dr. 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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time during standard to DST transition
by Jennifer Wang (jennifwa) Dec. 12, 2008

Dec. 12, 2008

Hello, We ran into a problem when setting time to the "missing hour" during transition from standard time to DST time. For example, setting time to Mar 8, 2009 at 2:10am using America/Los_Angeles time zone results in error. Should mktime() skip forward in this case and set the time to Mar 8, 2009 3:10am? Jennifer

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Mahe India TZ off 1 hr 30 min
by Julie Delany Dec. 11, 2008

Dec. 11, 2008

Hi, I found that Mahe, India (Mahe is the only city in India in the TZ? It's all one timezone anyway) has an error in the tz database. Per the world clock's meeting time program (using the TZ?): http:// www.timeanddate.com/worldclock/meetingtime.html? month=12&day=17&year=2008&p1=44&p2=224&p3=179&p4=-1 If it is 10:00 am Los Angeles time Wednesday Dec 17th, 2008, it is 11:30 p.m. in Mahe/Mumbai/India. But when I'm using the TZ in my perl program I get 10:00 p.m. Could you check that out for me? I've had to update my perl script to add 1 hour & 30 min. Thanks, julie

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FW: Wrong Argentinian DST introduced in version 2008f
by Olson, Arthur David (NIH/NCI) [E] Dec. 11, 2008

Dec. 11, 2008

I'm forwarding this message from Aurelien Jarno, who is not on the time zone mailing list. Those of you who are on the time zone mailing list, please direct replies appropriately. --ado -----Original Message----- From: Aurelien Jarno [mailto:aurelien@aurel32.net] Sent: Monday, October 06, 2008 9:29 To: tz(a)lecserver.nci.nih.gov Subject: Wrong Argentinian DST introduced in version 2008f Hi, tzdata version 2008f introduced a rule for Argentinian DST based on http://www.worldtimezone.com/dst_news/dst_news_argentina03.html and http://www.impulsobaires.com.ar/nota.php?id=57832 Unfortunately those links only speak about rumors of a DST change, there is nothing fixed officially, and according to some Argentinian people DST may even not happen this year. Until an official decision is taken it is probably a lot better to remove any DST rule for year 2008. Please find attached a patch to do that. Regards, Aurelien -- .''`. Aurelien Jarno | GPG: 1024D/F1BCDB73 : :' : Debian developer | Electrical Engineer `. `' aurel32(a)debian.org | aurelien(a)aurel32.net `- people.debian.org/~aurel32 | www.aurel32.net

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Fwd: zdump loop problem
by Jonathan Leffler Dec. 11, 2008

Dec. 11, 2008

Originally sent to the wrong email address - sorry. ---------- Forwarded message ---------- From: Jonathan Leffler <jonathan.leffler(a)gmail.com> Date: Mon, Dec 8, 2008 at 12:14 PM Subject: Re: zdump loop problem To: Robbin Kawabata <Robbin.Kawabata(a)sun.com> Cc: tz(a)lecserver.nci.nih.gov, a.radke(a)arcor.de On Mon, Dec 8, 2008 at 11:50 AM, Robbin Kawabata <Robbin.Kawabata(a)sun.com>wrote: > I ran ado's fix against all the timezones, and got good results. > > This is the diff: > > *** zdump_loop.c Tue Dec 2 11:17:01 2008 > --- zdump_fix_ado.c Tue Dec 2 12:49:05 2008 > *************** > *** 312,322 **** > (void) strncpy(buf, abbr(&tm), sizeof (buf) - 1); > } > for (;;) { > ! if (t >= cuthitime) > break; > newt = t + SECSPERHOUR * 12; > - if (newt >= cuthitime) > - break; > if (newt <= t) > break; > newtmp = localtime(&newt); > --- 312,320 ---- > (void) strncpy(buf, abbr(&tm), sizeof (buf) - 1); > } > for (;;) { > ! if (t >= cuthitime || t >= cuthitime - SECSPERHOUR > * 12) > break; > Isn't that code equivalent to just: if (t >= cuthitime - SECSPERHOUR * 12) I've not followed all the details of the thread, but AFAIUI, this code is protecting against overflow on positive quantities (rather than underflow on negative ones), and the double test is redundant unless cuthitime is within 12 * SECPERHOUR of the smallest (most negative) integer. > newt = t + SECSPERHOUR * 12; > if (newt <= t) > break; > newtmp = localtime(&newt); > > > However, isn't the check for "if (newt <= t) break" no longer needed? > Probably... > ----- Begin Forwarded Message ----- > > Date: Mon, 01 Dec 2008 16:21:00 -0500 > From: "Olson, Arthur David (NIH/NCI) [E]" <olsona(a)dc37a.nci.nih.gov> > Subject: Re: zdump loop problem > To: tz(a)lecserver.nci.nih.gov > Cc: Andreas Radke <a.radke(a)arcor.de> > > So...in the real world, does changing the zic.c lines reading... > if (t >= cuthitime) > break; > newt = t + SECSPERHOUR * 12; > if (newt >= cuthitime) > break; > ...to read... > if (t >= cuthitime || t >= cuthitime - > SECSPERHOUR * 12) > break; > newt = t + SECSPERHOUR * 12; > ...result in working code? I'd particularly appreciate feedback from > Andreas Radke or other ArchLinux users. > > ----- End Forwarded Message ----- > -- Jonathan Leffler <jonathan.leffler(a)gmail.com> #include <disclaimer.h> Guardian of DBD::Informix - v2008.0513 - http://dbi.perl.org "Blessed are we who can laugh at ourselves, for we shall never cease to be amused."

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