April 2004 - 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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ftp://elsie.nci.nih.gov/pub/ doesn't work
by Frédéric L. W. Meunier 12 Aug '04

12 Aug '04

I don't know why, but I'm assuming it's because it now rejects connectiong from hosts that don't resolve. Please let me know about any mirrors. -- http://www.pervalidus.net/contact.html

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Change in Mongolian daylight saving time
by Ganbold 17 Apr '04

17 Apr '04

Hello, Current rule settings for Mongolia in /usr/src/share/zoneinfo/asia is wrong. It should be changed from: ... Rule Mongol 2001 only - Apr 27 2:00s 1:00 S Rule Mongol 2001 only - Sep 28 2:00s 0 - ... To the following: ... Rule Mongol 2001 only - Mar lastSat 2:00s 1:00 S Rule Mongol 2001 only - Sep lastSat 2:00s 0 - ... Daylight saving occurs at 02:00 local time last Saturday of March. It will changes back to normal at 02:00 local time last Saturday of September. Please make appropriate changes. Please let me know if you have any questions. sincerely, Ganbold Ts. Mongolia

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Mass media article on leap seconds
by Olson, Arthur David (NIH/NCI) 14 Apr '04

14 Apr '04

The 2004-03 issue of the U.S. monthly "Discover" has an article titled "Leap Seconds" by Karen Wright(pages 42-45, but the first two pages are décor and an introductory blurb). No mention of the Big Secret (that leap seconds have not been inserted since January of 1999). The article states that "...computer software designers haven't adapted very well to the occasional added second, so experts in air traffic control, satellite communications, and electronic fund transfers have been lobbying to abolish the tinkering. A leap second may have caused the Russian satellite navigation system to crash for hours, and critics claim the added instants could cause commercial airliners to crash as well." The article also notes a couple of modest proposals: "Leap seconds could be inserted every four years along with the February leap day...or leap minutes could be added every half century or so." (Either proposal, if adopted, would require changes in both POSIX and the public-domain time zone code.) Your correspondent's two cents: in setting up the time handling in UNIX, T&R got it exactly right with respect to springing forward and falling back when DST goes in to and out of effect--keep the computer counting monotonically and leave it to the software to translate the monotonic count into a representation of local time. What's right at the level of an hour is also right at the level of a second--keep the computer counting at one count per second, and leave it to software to figure out what should be displayed when the user asks what time it is. --ado

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Re: ICU and "Sources for Time Zone and Daylight Saving Time Data"
by Paul Eggert 13 Apr '04

13 Apr '04

"Steven R. Loomis" <srl(a)jtcsv.com> writes: > Java 1.4 has historical time zones (I believe also from the tz > data?) Thanks for letting me know about this. I looked through the source code (in J2SE-1.4.2/java/src.zip) for this. As far as I can tell, the historical time zone data is in J2SE-1.4.2/j2se/jre/lib/zi, in a format that differs somewhat from the standard Olson format. Also, this information is not in every Java 1.4 implementation, though it is in Sun's. I can't find any supported way to convert from tz format to Java format, so if the Java data are wrong there doesn't seem to be any way to update them from the tz master. Does the following snippet summarize this information correctly? <li><a href="http://java.sun.com/">Sun Java</a> releases since 1.4 contain a copy of a recent <samp>tz</samp> database in a Java-specific format.</li>

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ICU and "Sources for Time Zone and Daylight Saving Time Data"
by Paul Eggert 10 Apr '04

10 Apr '04

> From: Steven R. Loomis [mailto:srl@jtcsv.com] > Sent: Wednesday, December 03, 2003 8:32 PM > http://oss.software.ibm.com/icu/ Thanks for letting me know about this. Here's a draft description of ICU's use of tz; please let me know of any problems. <li><a href="http://oss.software.ibm.com/icu/">International Components for Unicode (ICU)</a> contains a C/C++ library for internationalization that has a compiler from <samp>tz</samp> source into an ICU-specific format. ICU is freely available under a BSD-style license.</li> By the way do you know about Joda Time? Perhaps you could use it in the Java side of ICU. Here's what I was planning to add for it: <li><a href="http://joda-time.sourceforge.net/">Joda Time - Java date and time API</a> contains a class <code>org.joda.time.tz.ZoneInfoCompiler</code> that compiles <code>tz</code> source into a Joda-specific binary format. Joda Time is freely available under a BSD-style license.</li>

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FW: Update: URL of Time and Date Gateway changed
by Olson, Arthur David (NIH/NCI) 09 Apr '04

09 Apr '04

Peter Thoeny is not on the time zone mailing list; direct replies appropriately. --ado -----Original Message----- From: Peter Thoeny [mailto:peter.thoeny@attglobal.net] Sent: Monday, March 29, 2004 11:37 AM To: tz(a)lecserver.nci.nih.gov Subject: Update: URL of Time and Date Gateway changed Hi, please update the link to "Time and Date Gateway" from http://www.bsdi.com/date to http://TWiki.org/cgi-bin/xtra/tzdate. I am the admin of TWiki.org and inherited the date script from the BSDi folks since their web site is no longer in service. Regards, Peter

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FW: summer / daylight time terminology usage Sydney, AU
by Olson, Arthur David (NIH/NCI) 05 Apr '04

05 Apr '04

Darren Blanch is not on the time zone mailing list; direct replies appropriately (and note Darren's request at the end of the message). --ado >From darspam(a)optusnet.com.au Sat Apr 3 05:00:35 2004 Return-Path: <darspam(a)optusnet.com.au> Received: from mail008.syd.optusnet.com.au (mail008.syd.optusnet.com.au [211.29.132.212]) by lecserver.nci.nih.gov (8.12.10/8.12.10) with ESMTP id i33A0X7e005553 for <tz(a)elsie.nci.nih.gov>; Sat, 3 Apr 2004 05:00:34 -0500 (EST) Received: from webmail05.syd.optusnet.com.au (webmail05.syd.optusnet.com.au [211.29.132.239]) by mail008.syd.optusnet.com.au (8.11.6p2/8.11.6) with ESMTP id i33A0Md32146 for <tz(a)elsie.nci.nih.gov>; Sat, 3 Apr 2004 20:00:26 +1000 Message-Id: <200404031000.i33A0Md32146(a)mail008.syd.optusnet.com.au> Content-Type: text/plain Content-Disposition: inline Content-Transfer-Encoding: binary MIME-Version: 1.0 X-Mailer: MIME-tools 5.411 (Entity 5.404) Received: from [211.30.125.100] as user darspam(a)optusnet.com.au by webmail.optusnet.com.au with HTTP; From: darspam(a)optusnet.com.au To: tz(a)lecserver.nci.nih.gov Date: Sat, 03 Apr 2004 20:00:22 +1000 Subject: summer / daylight time terminology usage Sydney, AU Return-Receipt-To: darspam(a)optusnet.com.au Status: RO I found ftp://elsie.nci.nih.gov/pub/ via a reference in rfc2445. The "australasia" document within tzdata2003e.tar.gz made for a specially interesting read. I may be able to add something to the AESD/AEDT/EST/summer/daylight time debate: I am from Sydney, NSW, and have lived there all my life. I distinctly remember from when I was growing up (in the 70s), that people (incl. commercial TV news/weather) used to refer to "EST" for Eastern Standard Time and "DST" for Daylight Savings Time. Weather reports were generally tailored for each city/region so the "Eastern" could be inferred. (This inconsistency disturbed my naturally logical bent, even as a child, which is why I remember it.) However, the phrase "Eastern Summer Time" was also in wide use. These days, AEST and AEDT seem to be widespread, possibly an American influence?? As to the phrase "summer time" versus "daylight time", the locals almost never say "daylight time". Subjectively, I would say that "daylight savings time" is the most common phrase in use, rather than "summer time" (even though the legislation uses "summer time"). Similarly, when talking about start and end dates, we would say "when does daylight savings start?" or "when does daylight saving start?". Note, not "daylight savings time" but "[the practice of] daylight-saving". Regards, Darren R. BLANCH (SN=Blanch,GN=Darren) Blacktown, NSW, Australia dns:darren.blanch.name [Please direct replies to darspam(a)bhsc.nsw.gov.au in addition to darspam(a)optusnet.com.au, since I check the work address more frequently. Also, please don't include my email addresses in any versions of the data file - just "Darren R. Blanch" should suffice if your policies allow.]

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Small correction
by alan＠allm-geodata.com 04 Apr '04

04 Apr '04

>From http://www.twinsun.com/tz/tz-link.htm WORLDTIME: interactive atlas, time info, public holidays contains information on local time, sunrise and sunset, and public holidays in several hundred cities around the world. This now comes up with 'The display of holiday information is suspended Best wishes Alan Pritchard The GLOBAL GAZETTEER�: the world on file http://www.allm-geodata.com Tel: +44 (0) 1202 417 477

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