Based on Jim Brunette's observation, I soon found this: http://support.microsoft.com/kb/970653 August 2009 cumulative time zone update for Microsoft Windows operating systems
The update that this article describes changes the time zone data to accommodate daylight saving time (DST) changes in several countries, as outlined in this article. This update also includes other DST-related changes, time zone-related changes, and settings-related changes. Some of these changes have occurred since the products that are listed in the "Applies to" section were originally released. The CLDR has this: http://unicode.org/repos/cldr-tmp/trunk/diff/supplemental/windows_tzid.html And here is its XML source named supplementalData.xml: http://unicode.org/repos/cldr/trunk/common/supplemental/supplementalData.xml So it seems there is a standard mapping of Microsoft Windows time zones to the Olsen tz (Zoneinfo) database, but that is isn't up-to-date enough for practical use. I guess this is the problem with trying to standardize the coupling of two non-standard things (well, one proprietary thing with another de facto standard thing). Jim Monty ----- Original Message ---- From: Jim Brunette <ca...@brownhare.com> To: Dave Rolsky <auta...@urth.org> Cc: datetime <datetime@perl.org> Sent: Friday, September 11, 2009 2:05:37 PM Subject: Re: Win32 help for DT::TimeZone Here's my guess... # Failed test 'Kamchatka Standard Time - found valid Olson time zone from Windows' # at t\19local-win32.t line 115. # Failed test 'Paraguay Standard Time - found valid Olson time zone from Windows' # at t\19local-win32.t line 115. # Failed test 'UTC - found valid Olson time zone from Windows' # at t\19local-win32.t line 115. It looks like these timezones are missing from %WinToOlson in DateTime::TimeZone::Local::Win32. Need to add the following to the above hash: 'Kamchatka Standard Time' => 'Asia/Kamchatka', 'Paraguay Standard Time' => 'America/Asuncion', 'UTC' => 'UTC', Jim Brunette P.S. I did not test the above. (I am using ActivePerl, not sure how it runs or reports its tests.) Dave Rolsky wrote: > http://www.nntp.perl.org/group/perl.cpan.testers/2009/09/msg5285650.html > > Anyone care to take a stab at figuring that out? > > > -dave
