http://bugs.winehq.org/show_bug.cgi?id=12086
--- Comment #12 from Dmitry Timoshkov dmitry@codeweavers.com 2008-03-18 10:23:48 --- If you provide the list of time zones that should be fixed I'll fix them.
For the registry format have a look at dlls/ntdll/time.c,find_reg_tz_info() or http://blogs.technet.com/dst2007/Default.aspx?p=2 and look for REG_TZI_FORMAT.