http://bugs.winehq.org/show_bug.cgi?id=18991
--- Comment #58 from Otto Rey otto_rey@yahoo.com.ar 2009-08-16 13:57:56 --- Mono code (\mono\metadata\icall.c) call to GetTimeZoneInformation before call to SystemTimeToFileTime:
TIME_ZONE_INFORMATION tz_info; ... tz_id = GetTimeZoneInformation (&tz_info); ... err = SystemTimeToFileTime (&tz_info.StandardDate, &ft); ... err = SystemTimeToFileTime (&tz_info.DaylightDate, &ft); ...
Maybe that helps.