On 2015-06-01 03:25 PM, Steve Allen wrote:
On Mon 2015-06-01T12:05:08 -0700, Tom Van Baak hath writ:
Can you send me a definitive URL with global TZ rules so I can
grep|sort|uniq to get a feel for when DST transitions occurs? I guess
I thought it always was 2 am local (which implies jumps from 02h->03h
and 02h->01h).
I believe several Arab countries change at midnight.
This is the one-stop shopping authoritative data
https://www.iana.org/time-zones
except that the IANA content is repackaged by various vendors inside
of various toolkits for various platforms, so your system may not
follow those rules.
Also, possibly related, do you know of any place where DST is +/- 2
hours instead of +/- 1 hour? I ask because the still-in-development
PE (phase encoded) WWVB format appears to allow for such a (non US
legal) transition. I can't quite tell if it's a bug or typo or spec.
These are good questions for the tz mail list because the denizens
there have memory of many of the crazy things that local officials
have declared during the history of the tz project.
And there's the Windows timezones. They don't match tz database ....
The top of Windows registry hive holding the timezone information for
each of the supported timezones. Note this data is dynamically updated
with a "Windows Update". There's no authoritative information I've found
on how Microsoft goes about accumulating and managing this information.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones
The Windows registry key holding the currently selected timezone information
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\TimeZoneInformation
-Brooks
--
Steve Allen <[email protected]> WGS-84 (GPS)
UCO/Lick Observatory--ISB Natural Sciences II, Room 165 Lat +36.99855
1156 High Street Voice: +1 831 459 3046 Lng -122.06015
Santa Cruz, CA 95064 http://www.ucolick.org/~sla/ Hgt +250 m
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