http://bugs.winehq.org/show_bug.cgi?id=18991
--- Comment #67 from Dmitry Timoshkov dmitry@codeweavers.com 2009-08-26 23:54:01 --- (In reply to comment #66)
Ok, so... If I understand, Wine must reports DST/STD dates in day-of-week format with wrong values to be "more windows compatible". Is this the fix?
No, Wine shouldn't do that since Windows doesn't do that either. Wine behaviour is perfectly correct. It's a bug in older Mono versions, and Mono developers have fixed it because the bug caused problems for Windows users.