http://bugs.winehq.org/show_bug.cgi?id=12086
--- Comment #15 from Dmitry Timoshkov dmitry@codeweavers.com 2008-03-18 11:11:24 --- Rob atatched an updated Mike's program that was used to generate time zone data for Wine:
http://www.winehq.org/pipermail/wine-patches/2008-March/051455.html
You can add the time zones you need and regenerate the data.