This may be in the Control Panel of Windows under Date, Time, Language and Regional Options. A date display format setting there has been known to affect date formats in Office.
I have lost the day name which used to appear next to the date in Outlook 2003. I have tried help on line but the answers that are offered only refer to the date of the starting week. I get '2 December 2004' and I want 'Thursday 2 December 2004'. Anyone know how to do this? Thanks in anticipation.