January 2000 - tz - lists.iana.org

Re: DST start/end comments
by Oscar van Vlijmen 31 Jan '00

31 Jan '00

Jesper, Thanks for your email with several comments on, well, let's say the art of being up to date. My DST start/end list has been compiled from the tzdata2000a data, with the aid of a Macintosh HyperCard application I developed recently. I intend to follow the _published tzdata_ closely, even if somebody on the tz-mailing list tells that there could be something wrong. As fas as I can guess, it is up to Paul Eggert to make decisions about all new information and proposals and up to Arthur Olson to produce new tzcode and tzdata files. This process takes a while. The Australia data is in study and confirmation has been asked; cf. Paul's email to Margaret Turner, Jan. 22. I am following time zone information on the Internet for several years and I have found that the tzdata information seems to be the most up to date and the most accurate. Probably not 100% accurate, but consistently the most up to date and the most accurate. There are many web pages in existence which use the tzdata information themselves, but I have found that in many cases they do not use the latest information. I looked today at timezoneconverter.com and I had the impression that they are using the tzdata1999h information from October 1999 (http://www.timezoneconverter.com/tzchist.html) The site of Steffen Thorsen (http://www.timeanddate.com) deserves to be listed on the tz-link.htm page. On his credits page he writes: "These are resources available on the net, which has helped very much during the development and maintenance of this site. The Time Zone Database - maintained by Arthur David Olson, Paul Eggert and hundreds of volunteers, available at ftp://elsie.nci.nih.gov/pub/ - much of time zone information is obtained here". I particularly like his neat webinterface and many functions. He seems to be pretty up to date, but it looks like he uses predominantly tzdata, so probably nothing new here. About the time formats used in tzdata files. I agree with you that it looks a bit like a mess, but the format is clearly explained in the file zic.8 in the tzcode folder. A time followed by w is 'wall clock' time, followed by s is local standard time, followed by u, g or z is universal time. Without a subsequent letter wall clock time is assumed. My interpretations: 'wall clock' time is the current local time, which could be wintertime or summertime. The 'local standard' time is always the local wintertime. 'Universal' time is the same as UTC. Although this is a reaction to a more or less private email, I hope you don't mind if I send my email in copy to the tz-mailing list, since it is possible that the answers are useful to more people. Even then, some of my interpretations could be wrong and I would like to be corrected on them. Regards, Oscar van Vlijmen 2000-01-31

1 0

FW: Changes for TZ Europe/Tallinn
by Olson, Arthur David (NCI) 31 Jan '00

31 Jan '00

-----Original Message----- From: Mart Oruaas [SMTP:fazz@pobox.com] Sent: Saturday, January 29, 2000 10:47 AM To: tz(a)elsie.nci.nih.gov Subject: Changes for TZ Europe/Tallinn Hello. As it was expected, Estonian government decided not switch between summer and winter time anymore since spring 2000. Regulation no. 301 from the 12th of October 1999 obsoletes previous regulation no. 206 from the 22nd of September 1998 and thus sticks Estonia to +02:00 GMT for all the year round. The regulation is effective from the 1st on November 1999: http://trip.rk.ee/cgi-bin/thw?${BASE}=akt&${THWIDS}=0.2/894&${HTML}=rtdl1x&… URLSAVE}=2/894A >From now on, the zone definition for Europe/Tallinn should probably look like this: # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Europe/Tallinn 1:39:00 - LMT 1880 1:39:00 - TMT 1918 Feb # Tallinn Mean Time 1:00 C-Eur CE%sT 1919 Jul 1:39:00 - TMT 1921 May 2:00 - EET 1940 Aug 6 3:00 - MSK 1941 Sep 15 1:00 C-Eur CE%sT 1944 Sep 22 3:00 Russia MSK/MSD 1989 Mar 26 2:00s 2:00 1:00 EEST 1989 Sep 24 2:00s 2:00 C-Eur EE%sT 1998 Sep 22 2:00 EU EE%sT 1999 Nov 1 2:00 - EET PS. I hope that it stays this way. Politicians tend to make pretty surprising moves sometimes... ;-) -- fazz

1 0

FW: Summer Time on Lord Howe Island
by Olson, Arthur David (NCI) 31 Jan '00

31 Jan '00

-----Original Message----- From: Jesper Nørgaard [SMTP:jnorgard@Prodigy.Net.mx] Sent: Thursday, January 27, 2000 9:06 PM To: 'TZ mailing list' Subject: FW: Summer Time on Lord Howe Island I made a number of inquiries via e-mail to recipients in Lord Howe Island, and got this response which seems to me to be authoritative. I don't know if anybody can confirm this further. Certainly there exists a Lord Howe Island Board determining issues on the island. So the suggestion is to change the start time for Lord Howe Island to equal Sydney and other NSW localities. Regards, ---------- From: Jeeves[SMTP:kingfish@bigpond.com.au] Sent: Jueves 27 de Enero de 2000 16.38 To: jnorgard(a)Prodigy.Net.mx Subject: Summer Time on Lord Howe Island Jesper Lord Howe Island summer time in 2000/2001 will commence on the same date as the rest of NSW (i.e. 27/8/00). For your information the Lord Howe Island Board (controlling authority for the Island) is seeking the community's views on various options for summer time arrangements on the Island, e.g. advance clocks by 1 full hour instead of only 30 minutes. Dependant on the wishes of residents the Board may approach the NSW government to change the existing arrangements. The starting date for summer time on the Island will however always coincide with the rest of NSW. I hope this helps. James Lonergan Secretary Lord Howe Island Board

1 0

Changes for TZ Europe/Tallinn
by Mart Oruaas 29 Jan '00

29 Jan '00

Hello. As it was expected, Estonian government decided not switch between summer and winter time anymore since spring 2000. Regulation no. 301 from the 12th of October 1999 obsoletes previous regulation no. 206 from the 22nd of September 1998 and thus sticks Estonia to +02:00 GMT for all the year round. The regulation is effective from the 1st on November 1999: http://trip.rk.ee/cgi-bin/thw?${BASE}=akt&${THWIDS}=0.2/894&${HTML}=rtdl1x&… URLSAVE}=2/894A >From now on, the zone definition for Europe/Tallinn should probably look like this: # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Europe/Tallinn 1:39:00 - LMT 1880 1:39:00 - TMT 1918 Feb # Tallinn Mean Time 1:00 C-Eur CE%sT 1919 Jul 1:39:00 - TMT 1921 May 2:00 - EET 1940 Aug 6 3:00 - MSK 1941 Sep 15 1:00 C-Eur CE%sT 1944 Sep 22 3:00 Russia MSK/MSD 1989 Mar 26 2:00s 2:00 1:00 EEST 1989 Sep 24 2:00s 2:00 C-Eur EE%sT 1998 Sep 22 2:00 EU EE%sT 1999 Nov 1 2:00 - EET PS. I hope that it stays this way. Politicians tend to make pretty surprising moves sometimes... ;-) -- fazz

1 0

FW: Summer Time on Lord Howe Island
by Jesper Nørgaard 27 Jan '00

27 Jan '00

I made a number of inquiries via e-mail to recipients in Lord Howe Island, and got this response which seems to me to be authoritative. I don't know if anybody can confirm this further. Certainly there exists a Lord Howe Island Board determining issues on the island. So the suggestion is to change the start time for Lord Howe Island to equal Sydney and other NSW localities. Regards, ---------- From: Jeeves[SMTP:kingfish@bigpond.com.au] Sent: Jueves 27 de Enero de 2000 16.38 To: jnorgard(a)Prodigy.Net.mx Subject: Summer Time on Lord Howe Island Jesper Lord Howe Island summer time in 2000/2001 will commence on the same date as the rest of NSW (i.e. 27/8/00). For your information the Lord Howe Island Board (controlling authority for the Island) is seeking the community's views on various options for summer time arrangements on the Island, e.g. advance clocks by 1 full hour instead of only 30 minutes. Dependant on the wishes of residents the Board may approach the NSW government to change the existing arrangements. The starting date for summer time on the Island will however always coincide with the rest of NSW. I hope this helps. James Lonergan Secretary Lord Howe Island Board

1 0

DST table
by Oscar van Vlijmen 25 Jan '00

25 Jan '00

A rather complete daylight saving time table can be found at http://www1.tip.nl/~t876506/DSTtable.html The first half of the table is a date/time sorted list of all DST starting dates and times in the world and the second half of the table gives the DST ending dates/times. Only for the year 2000. Based on the data in tzdata2000a. It is possible that the Australia data is not completely correct, but I wait until the next tzdata files are published. Regards, Oscar van Vlijmen 2000-01-25

1 0

Re: [donnte@microsoft.com: RE: RE: time t]
by Keld Jørn Simonsen 24 Jan '00

24 Jan '00

On Mon, Jan 24, 2000 at 10:15:32AM +0100, Antoine Leca wrote: > Hi all, > > Keld Jørn Simonsen wrote: > > > > Hi Wg14 gang, > > > > here is something which is being discussed in the POSIX area, > > How can I be involved in this discussion? > > I have some comments that quickly come to mind when I read it, but > I do not believe this is the appropriate forum to expose them, > and I do not want to enter another forum without being introduced > in some way. > > Also, Keld, can you also forward this announcement to the mailing list > <URL:mailto:tz@elsie.nci.nih.gov> (or to its moderator, Arthur Olson, > <URL:mailto:olsona@dc37a.nci.nih.gov>), where there are also some > discussions on this subject, with very knowledgeable persons. > Or as an alternative, I may forward it myself, but I prefer the > POSIX guys will do the introduction themselves. please refer to http://www.opengroup.org/austin/ Thereyou can enroll in the posix discussion, which currently also includes a discussion on future tim formats. The Austin list is open to everybody. Keld

1 0

URIs for time zone HTML files
by Paul Eggert 23 Jan '00

23 Jan '00

I've copied the HTML files in the standard tz distribution to the following locations: http://www.twinsun.com/tz/tz-link.htm http://www.twinsun.com/tz/tz-art.htm Please feel free to publish these URIs; I plan to keep these web pages in sync with the copies in the canonical NCI FTP tarballs. The indirection is necessary because the National Cancer Institute frowns on web pages that can be accessed by the outside world.

1 0

DST Australia & surroundings
by Oscar van Vlijmen 23 Jan '00

23 Jan '00

Indeed, a short but good overview of the daylight saving times in several parts of South Australia from 1999-2001: http://www.sacentral.sa.gov.au/information/daylite.htm "South Australia Central - Information & Community" Much more information about the when, where and why can be found on the page "Australia's Daylight Saving Times", http://www.dstc.qut.edu.au/DST/marg/daylight.html Please note that this page also gives detailed information about: Lord Howe Island, Admiralty Islands, Mutton Bird Islands, Ball`s Pyramid, Norfolk Island, Nepean and Phillip Island,Cocos (Keeling) Islands, Christmas Island, Ashmore and Cartier Islands, Heard Island, McDonald Islands, Macquarie Island, Australian Antarctic Territory - Davis, Mawson, Casey. Interesting to note that this page confirms that the Macquarie Island station follows Tasmania, including DST. I would like to suggest that the tz file "australasia" should be updated with this information, if the information is regarded to be true. Oscar van Vlijmen 2000-01-22

2 1

Lord Howe Island DST and the Olympics, Macquarie Island DST, etc.
by Paul Eggert 22 Jan '00

22 Jan '00

Oscar van Vlijmen noted some discrepancies between your excellent web page <http://www.dstc.qut.edu.au/DST/marg/daylight.html> on Australian daylight saving time and the public domain time zone ("tz") database maintained by Olson et al (please see <http://www.twinsun.com/tz/tz-link.htm> for details). Can you please let me know any thoughts you might have about these discrepancies? * Your web page says `Next year, daylight saving will start much earlier in NSW and Victoria'. This is also true of Tasmania and ACT; e.g. see <http://www.sacentral.sa.gov.au/information/daylite.htm>. * Your web page implies (but does not explicitly say) that Lord Howe Island will start DST early this year for the Olympics, at the same time as the rest of NSW. Is this true? If so, the tz database needs to be updated. * Your web page says `Macquarie Island ... changes over to daylight saving time when Tasmania does'. But The Australian Bureau of Meteorology FAQ <http://www.bom.gov.au/faq/faqgen.htm> writes `Macquarie Island follows Tasmanian practice irrespective of any local use of DST.' (I'm not sure what they mean, but they use different wording for Giles and Lord Howe Island.) * While we're on the subject, that same web page says that Giles Meteorological Station uses South Australian time even though it's located in Western Australia. * Your web page gives time zones for Heard and McDonald islands. I assume that this is for when they have visitors? I'm under the impression that they have no permanent human inhabitants. I bring this up because the tz database omits locations that are not permanently inhabited, to keep things manageable; but if Heard and McDonald are permanently inhabited we need to create an entry for that location.

1 0