October 2000 - tz - lists.iana.org

Re: FW: Question on TZ data
by Paul Eggert Oct. 13, 2000

Oct. 13, 2000

> From: mikec(a)imeeting.net [mailto:mikec@imeeting.net] > Sent: Thursday, October 12, 2000 9:47 PM > Is there source code on the web that will product a concise listing of each > timezone and it's most recently observed start and end times for DST and / The closest approximation that I know of is the GNU Emacs Lisp function calendar-current-time-zone which I co-wrote with Ed Reingold. For example, on my host (in Los Angeles) it returns: (-480 60 "PST" "PDT" (calendar-nth-named-day 1 0 4 year) (calendar-nth-named-day -1 0 10 year) 120 120) which says that standard time is 480 minutes behind UTC, DST is 60 minutes ahead of standard time, the standard and daylight abbreviations are "PST" and "PDT" respectively, and DST starts on the first Sunday in April and ends on the last Sunday in October, both at 120 minutes after midnight local time. calendar-current-time-zone infers the DST rules purely by invoking localtime and gmtime; it doesn't have a database of its own, and it doesn't parse the tz database format. It uses heuristics, so it won't always give you the right results in theory, though in practice it's pretty reliable. E.g. it does the right thing for TZ=Asia/Tehran because it knows about the Persian calendar. This function should give you the raw material to write the program that you want, without too much trouble. And the source code is freely available under the GPL, so if you prefer using some system other than GNU Emacs Lisp you can translate it.

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FW: Question on TZ data
by Olson, Arthur David (NCI) Oct. 13, 2000

Oct. 13, 2000

Michael Ciavarini is not on the time zone mailing list; direct replies appropriately. --ado -----Original Message----- From: mikec(a)imeeting.net [mailto:mikec@imeeting.net] Sent: Thursday, October 12, 2000 9:47 PM To: Olson, Arthur David (NCI) Subject: RE: Question on TZ data Ok I did what you suggested. What I got is output that tells me what time it is currently in all of the timezones of each country. Here is what I'm trying to accomplish. Maybe you can tell me if I can accomplish my task with your database and the code and data zip files compiled. 1. I need to build a text file the explains each recognizable timezone as follows: Example: US-Eastern Daylight savings time = yes, 1 hour DST starts on first Sunday of April DST ends last Sunday of October This information is in your textual files but it is very difficult and time consuming to read. My question. Is there source code on the web that will product a concise listing of each timezone and it's most recently observed start and end times for DST and / or Standard times? If so, can you tell me where I can get the source code and how to run it? Like I said prior, I have your code downloaded and compiled on a UNIX computer. I have zdump working but I don't have enough documentation if any that explains what these supportive files do. Can you help me? Again, thank you very much. Michael Ciavarini www.meetingmaker.com

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Question on TZ data
by mikec＠imeeting.net Oct. 12, 2000

Oct. 12, 2000

Hi, thank you for your reponse. I have downloaded the TZ files and compiled them. From here I really don't know how to read the timezone data files. I would like to build a database of all of the timezones recognized in the world. My question is can these data files be dumped into a readable format that shows the finalized up to date rules for a timezone such as it's offset from GMT and the beginning and end of when summer time or daylight savings begins and ends? Can this be extracted from these files with the code that I have compiled? If not is there a reader available? Michael Ciavarini 781 487-3526

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error in tz-art.htm
by Alex LIVINGSTON Oct. 10, 2000

Oct. 10, 2000

To quote: >Personnel: Anthony Braxton, sporanino and alto saxophones, > contrebasse clarinet, miscellaneous instruments Shouldn't "sporanino" be "sopranino"? There are only two or three occurrences of "sporanino" on the Web according to Google (one of them the one in question), but about a hundred of "sopranino". (My e-mail spell checker flags them both as wrong!) Also, could someone please interpret the ADO ratings for me? Is a black dot good or extremely bad? Is three starts "tops" or can it in theory go higher? --Alex

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tzcode2000g, gccdiffs is obsolete
by Joseph S. Myers Oct. 10, 2000

Oct. 10, 2000

tzcode2000g contains a file "gccdiffs" with patches against an antique version of GCC (2.7.2.1) to check strftime formats against those accepted by an antique version of glibc (1.09.1). This file is completely obsolete; GCC 2.95.2 (the current release) will check strftime formats, and the format checking in GCC CVS (3.0-to-be) has been largely rewritten to check properly C89, C99, X/Open and glibc 2.2 formats (printf, scanf and strftime). -- Joseph S. Myers jsm28(a)cam.ac.uk

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tzcode2000g.tar.gz and tzdata2000g.tar.gz
by Olson, Arthur David (NCI) Oct. 10, 2000

Oct. 10, 2000

The files ftp://elsie.nci.nih.gov/pub/tzcode2000g.tar.gz and ftp://elsie.nci.nih.gov/pub/tzdata2000g.tar.gz are now available. These include the changes circulated by Paul Eggert last week on the time zone mailing list, the correction of John Mackin's name submitted by Robert Elz, and Garry Shandling's Daylight Saving Time joke (!?!) from the recent Emmy Awards broadcast. --ado

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Re: Nunavut's time zone....GOOD GOLLY!!! (fwd)
by Garrett Wollman Oct. 8, 2000

Oct. 8, 2000

Ack!

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FW: Macintosh Calendar Application
by Olson, Arthur David (NCI) Oct. 6, 2000

Oct. 6, 2000

Nick Strauss is not on the time zone mailing list; direct replies appropriately. --ado -----Original Message----- From: Nick Strauss [mailto:ncs@alum.mit.edu] Sent: Thursday, October 05, 2000 7:03 PM To: tz(a)elsie.nci.nih.gov Subject: Macintosh Calendar Application A calendar application download for the macintosh is available at http://www.chesco.com/~nicks. One can pay if one wishes. -- ------------------------------------------------------------ Infinity Software nicks(a)chesco.com http://www.chesco.com/~nicks -----BEGIN PGP PUBLIC KEY BLOCK----- Version: PGPfreeware 5.0 for non-commercial use <http://www.pgp.com> mQGiBDdoMKoRBADcw8/3TTYvqLt9X2QXixoLX53ogj7gz3SbiWG49GBniARxq8Xd lRnq3Qq+k4vxsCVCtYRHidbXsRK9BkRgiVfvcJy/JpL/h1V2H2OSrc1Ks0KjUX2v Gb5AWPAg5WVcrNb2xUY5dcjmCRGUi/iXKtwnc+SmhVlM+dzDrbUtw3G9mwCg/4k5 5gkSJnmYEAdaN173UaYD+1cD/3YX/jrVfLD6N6zgFyMxmF/VeL0M1LgqLSw6PfM1 zVyMEHeOZzctgKic9re+r8HQa48b3cUR3zCV/ckt9RHDVqR6qCXmdsJtWKbHP0s+ 8LieGnws9L8nq2lmqDN4PYhHHm7BGToNrZrpdZWGO3vAq8FMiKUPp9nJY3rcTQs5 y6R6A/91Z7YdhpOdiQy2IMZZhLmbSIQ53NYU7C48+RdEUAIkW5l0rtfKA2J5jDi/ s5Q64F04tXkI6CnD8+ljIJ+xEUj8kLnBixeCFoHAprsnM9sGj/+UxRvD2jcQ7ZzH itrtQfU2erwo79imWo7uOERBako6JNv+PG6tqVfyWVbY8ZWXW7QjbmljaG9sYXMg c3RyYXVzcyA8bmNzQGFsdW0ubWl0LmVkdT6JAEsEEBECAAsFAjdoMKoECwMBAgAK CRBl84DJ8rcStH4gAJ4wbHWNlme4+yWVsOV90VRjEyS5TACgg2qnreVqCIjPHhUK 9gLG1/wEcXy5Aw0EN2gwqhAMAMwdd1ckOErixPDojhNnl06SE2H22+slDhf99pj3 yHx5sHIdOHX79sFzxIMRJitDYMPj6NYK/aEoJguuqa6zZQ+iAFMBoHzWq6MSHvoP Ks4fdIRPyvMX86RA6dfSd7ZCLQI2wSbLaF6dfJgJCo1+Le3kXXn11JJPmxiO/Cqn S3wy9kJXtwh/CBdyorrWqULzBej5UxE5T7bxbrlLOCDaAadWoxTpj0BV89AHxstD qZSt90xkhkn4DIO9ZekX1KHTUPj1WV/cdlJPPT2N286Z4VeSWc39uK50T8X8dryD xUcwYc58yWb/Ffm7/ZFexwGq01uejaClcjrUGvC/RgBYK+X0iP1YTknbzSC0neSR BzZrM2w4DUUdD3yIsxx8Wy2O9vPJI8BD8KVbGI2Ou1WMuF040zT9fBdXQ6MdGGze MyEstSr/POGxKUAYEY18hKcKctaGxAMZyAcpesqVDNmWn6vQClCbAkbTCD1mpF1B n5x8vYlLIhkmuquiXsNV6UwybwACAgwAuMKxwz45b36AoTAOW12B4B1sm36qShSj TFipnrN/O7sV03CHdE0hXz1+zHtJUwm+Xt8WYEvrrx3hVT+dKp41HDPAQEkuWCdr EjTiQvN2u37BHhIPpExCjjTzt8UvuhzXAU9+gZVZXzuvFVosqfx7LsngC2NOKGvu BLJkrLh47fJhDrYYu5Vq5myUqARTiUoA/88kJYSDr8lTdTKUoNc9IMsD5wZTRX2s 3NUnS+Wql2yHmY3txF6/LGQO3SYOTBze8rGAxiKEnD7XTKY+6U0X2hSIFMnl9nRP HUkl+/hyyns/b4SpsdM1lv1Sfl9BOCP6ygLV+T6kbThLnCHRtRFQCUDd2R8a3PiH VMetJrYhj6AAIE42Gmuqibeqw1WlvFnzXrwdGHlEWxEZ+Scj+y2wpAuCCABAAPhQ a7t8aIrBW+cnI62FqAmPlPu9xK6pOD5NZ/s3eoNiXxzcbYCxweDv7ypGyYOtSB4a es6fdgCcNWSUZAuBP2OQv+/NGnCyHLmUiQA/AwUYN2gwqmXzgMnytxK0EQJHQQCf Rzkk500k4fkaQiM05xFdxnWaU84AnRbIys57P0JveKdE6Gfa8XjrMHOS =lYII -----END PGP PUBLIC KEY BLOCK-----

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Zeller
by Oscar van Vlijmen Oct. 6, 2000

Oct. 6, 2000

Allow me to give a couple of key sources for Zeller's algorithm to find the day of the week: nr = (k + floor((13*m-1)/5) + D + floor(D/4) + floor(C/4) - 2*C) mod 7 k: day of the month. m: month number shifted by -2; March = 1, April = 2, January = 11 of year-1, February = 12 of year-1. D: year mod 100, or the last two digits of the year. C: year div 100, or the century; at the moment C = 20. nr is an integer from 0 to 6. 0 corresponds to Sunday, 1 to Monday etcetera. Source: Ask Dr. Math: FAQ, 'The Calendar and the Days of the Week' http://forum.swarthmore.edu/dr.math/faq/faq.calendar.html Other source: 'Weekday -- from Eric Weisstein's Treasure Trove of Astronomy', Eric W. Weisstein and Wolfram Research http://www.treasure-troves.com/astro/Weekday.html Zeller's formula works only for Gregorian dates. Astronomers first convert any date (Julian, Gregorian) to the Julian date number. This number mod 7 gives the day of the week; 0 = Sunday, 1 = Monday, etc. Source: Astronomical algorithms, J. Meeus, Willmann-Bell, Chapter 7. Oscar van Vlijmen 2000-10-04

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FW: share/zoneinfo/southamerica (Brazil saving update)
by Olson, Arthur David (NCI) Oct. 5, 2000

Oct. 5, 2000

Mario Sergio Fujikawa Ferreira is not on the time zone mailing list; direct replies appropriately. --ado -----Original Message----- From: Mario Sergio Fujikawa Ferreira [mailto:lioux@uol.com.br] Sent: Monday, October 02, 2000 9:01 AM To: tz(a)elsie.nci.nih.gov Subject: share/zoneinfo/southamerica (Brazil saving update) Hi, I was informed this was the right place to inform this. If you are not, I both apologize and ask if you can direct this to the right person. I would like to report that the Light Time Saving estimates for Brazil are incorrect. The new correct time savings for this year are - begin 08 Oct 2000 00:00:00 - end 18 Feb 2001 00:00:00 Unfortunaly, it is not clear if the 2nd weekend of September will be the official beginning for consequent years. The same applies for the end date. Therefore, I would advise maintaining the actual policy, yet adding this year's information. By the way, no states were removed or added in this latest decree. --- southamerica Fri Apr 7 01:20:30 2000 +++ /tmp/southamerica Sun Oct 1 02:02:25 2000 @@ -353,6 +353,10 @@ # and are quite possibly wrong, but are more likely than no DST at all. Rule Brazil 1999 max - Oct Sun>=1 0:00 1:00 S Rule Brazil 2000 max - Feb lastSun 0:00 0 - +# Decree <a href="http://pcdsh01.on.br/DEC3592.htm">3,592</a> (1999-10-01) +# adopted by the same states. +Rule Brazil 2000 only - Oct 6 0:00 1:00 S +Rule Brazil 2001 only - Feb 18 0:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] -- Mario S. F. Ferreira - UnB - Brazil - "I guess this is a signature." lioux at ( freebsd dot org | linf dot unb dot br ) flames to beloved devnull(a)someotherworldbeloworabove.org

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