November 2000 - tz - lists.iana.org

FW: timezone information for Rarotonga / Cook Islands
by Olson, Arthur David (NCI) Nov. 6, 2000

Nov. 6, 2000

Robert McFadzien is not on the time zone mailing list; direct replies appropriately. --ado -----Original Message----- From: Robert McFadzien [mailto:robert@telecom.co.ck] Sent: Monday, November 06, 2000 4:39 PM To: 'tz(a)elsie.nci.nih.gov' Subject: timezone information for Rarotonga / Cook Islands Can you please confirm the timezone information that you have for Rarotonga / Cook Islands (South Pacific) Rarotonga should be GMT -10.00. There is no daylight saving. =========================== Robert McFadzien Information Systems Manager Telecom Cook Islands Ph. # +682 26171 Ext 225 Fax # +682 26174 Email: robert(a)telecom.co.ck ===========================

1 0

timezone information for Rarotonga / Cook Islands
by Robert McFadzien Nov. 6, 2000

Nov. 6, 2000

Can you please confirm the timezone information that you have for Rarotonga / Cook Islands (South Pacific) Rarotonga should be GMT -10.00. There is no daylight saving. =========================== Robert McFadzien Information Systems Manager Telecom Cook Islands Ph. # +682 26171 Ext 225 Fax # +682 26174 Email: robert(a)telecom.co.ck ===========================

1 0

RE: LHI daylight savings (fwd)
by Jesper Nørgaard Nov. 4, 2000

Nov. 4, 2000

James Lonergan's confirmation that LHI always advanced clocks going into DST at 2:00 local time, refutes the idea that Sydney and LHI has always been in sync, apart from the half hour difference while not in DST. I guess I overinterpreted James Lonergan, and apologize for that. I should have asked him instead (I thought I did, but couldn't find the mail, so I probably didn't). I agree that the patch should be rolled back. We should document history in the time zone area, not invent it :) Seen in retrospect, this was probably not a very good guess either. Only EEC (the western part of Europe) has notably made a system where all the countries are going in and out of DST the exact same second (in GMT) while not even USA is doing that, much less Canada, Russia or even Australia (from which Lord Howe Island belongs). Regards, Jesper Nørgaard Email: jnorgard(a)Prodigy.Net.mx Programador/Analista CIMMYT - Centro Internacional de Mejoramiento de Maíz y Trigo Dirección: CIMMYT, Lisboa 27, 06600 Mexico, D.F. 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 CIMMYT home page: http://cimmyt.cgiar.org Check out my Time Zone Converter: http://timezone50.homepage.com ---------- From: David Keegel[SMTP:djk@cyber.com.au] Sent: Martes 24 de Octubre de 2000 19.47 To: tz(a)elsie.nci.nih.gov Subject: Re: LHI daylight savings (fwd) I wrote to James Lonergan to clarify the situation about what time DST starts on Lord Howe Island exactly. ----- Forwarded message from James Lonergan ----- From: "James Lonergan" <kingfish(a)bigpond.com> To: "David Keegel" <djk(a)cyber.com.au> Subject: Re: LHI daylight savings My apologies for not responding earlier...I have been on leave. Lord Howe Island advances clocks by 30 minutes during DST in NSW and retards clocks by 30 minutes when DST finishes. Since DST was most recently introduced in NSW, the "changeover" time on the Island has been 02:00 as shown on clocks on LHI. I guess this means that for 30 minutes at the start of DST, LHI is actually 1 hour ahead of the rest of NSW. Regards Jim Lonergan ----- End of forwarded message from James Lonergan ----- So could we please back-out the following patch: =================================================================== RCS file: RCS/australasia,v retrieving revision 2000.6 retrieving revision 2000.6.0.1 diff -pu -r2000.6 -r2000.6.0.1 --- australasia 2000/08/10 13:31:51 2000.6 +++ australasia 2000/10/03 06:01:09 2000.6.0.1 @@ -153,14 +153,14 @@ Zone Australia/Broken_Hill 9:25:48 - LMT # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule LH 1981 1984 - Oct lastSun 2:00s 1:00 - Rule LH 1982 1985 - Mar Sun>=1 2:00s 0 - -Rule LH 1985 only - Oct lastSun 2:00s 0:30 - -Rule LH 1986 1989 - Mar Sun>=15 2:00s 0 - -Rule LH 1986 only - Oct 19 2:00s 0:30 - -Rule LH 1987 1999 - Oct lastSun 2:00s 0:30 - -Rule LH 1990 1995 - Mar Sun>=1 2:00s 0 - -Rule LH 1996 max - Mar lastSun 2:00s 0 - -Rule LH 2000 only - Aug lastSun 2:00s 0:30 - -Rule LH 2001 max - Oct lastSun 2:00s 0:30 - +Rule LH 1985 only - Oct lastSun 2:30s 0:30 - +Rule LH 1986 1989 - Mar Sun>=15 2:30s 0 - +Rule LH 1986 only - Oct 19 2:30s 0:30 - +Rule LH 1987 1999 - Oct lastSun 2:30s 0:30 - +Rule LH 1990 1995 - Mar Sun>=1 2:30s 0 - +Rule LH 1996 max - Mar lastSun 2:30s 0 - +Rule LH 2000 only - Aug lastSun 2:30s 0:30 - +Rule LH 2001 max - Oct lastSun 2:30s 0:30 - Zone Australia/Lord_Howe 10:36:20 - LMT 1895 Feb 10:00 - EST 1981 Mar 10:30 LH LHST -# From Paul Eggert (2000-01-31): -# For Lord Howe we use Shanks through 1989, and Lonergan thereafter. +# From Jesper Norgaard <jnorgard(a)Prodigy.net.mx> (2000-09-04): +# James Lonergan said that the island always tries to stay in sync +# with the rest of NSW at all time except for the fact that they stay +# ahead half an hour when DST is not observed. If this is interpreted +# literally, they should change clocks at the exact moment that +# e.g. Canberra changes from normal to daylight saving and vice versa. + +# From Paul Eggert (2000-10-02): +# For Lord Howe we use Shanks through 1989, and Lonergan thereafter, +# However, as per Norgaard we modify Shanks by assuming 02:30s switchover +# for half-hour DST. __________________________________________________________________________ David Keegel <djk(a)cyber.com.au> URL: http://www.cyber.com.au/users/djk/ Cybersource P/L: Unix Systems Administration and TCP/IP network management

1 0

week starts at Sunday or Monday??
by Christoph Bugel Nov. 2, 2000

Nov. 2, 2000

I've written a nice Date Time class library to get a grip on Daylight Saving Time bugs. It is mostly a wrapper around the existing stuff from #include <time.h>, but the idea is to force the user to forget about those, and be forced to think what timezone he is talking about. (I have a class TZone, which user MUST supply if he want to construct a date, or if he want to break it down into readable fields). and also the idea is to make clear what the isdst flag semantics are, etc. I am putting the finishing touches, and I now decide on a few trivial questions (which seem inportant anyhoow..) (1) I decided to have the MONTH and the WeekDay 1-based (in struct tm they start at zero). I guess there are arguments for both, but I didn't like the inconsistency between weekday (0-6) and monthday (1-31). also, if month is (0-11) I have to add 1 before printing, because users are definitely used to december as month 12, not month 11. so my question is.... now that I decided that days are niumbere 1 to 7, what is day 1 ??? is it Sunday, or Monday? what is the Right Thing to do? regards, Christoph

13 27