In Outlook 2002 and 2003, you could use a calendar color label for this.

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Sue Mosher, Outlook MVP
Author of
Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
> Any way I can color past days in calendar view - equivalent of crossing
> out
> past days on a papaer calendar. I would love to have this happen
> automatically at midnight. It would draw attention to today much quicker.
> Any
> suggestions?