http://bugs.winehq.org/show_bug.cgi?id=12086
--- Comment #10 from Dmitry Timoshkov dmitry@codeweavers.com 2008-03-18 03:49:19 --- The following patch fixes the problem for me (I updated tz info for Mexico as well while I had an opportunity):
http://www.winehq.org/pipermail/wine-patches/2008-March/051734.html