You could try setting the system local system account that runs asp.
http://www.adopenstatic.com/faq/systemdateformat.asp
You could use the Session.LCID variable
http://support.microsoft.com/?kbid=229690
You could write your own custom date function also here are some Q&A regards dates and asp.
http://www.aspfaqs.com/aspfaqs/ShowCategory.asp?CatID=3
hth