I do this all the time -- Ctrl+drag copies the appointment to the target
date.

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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
>I can't believe that in 2004 I still can't select a calendar event, copy
>it,
> switch to another day, and paste it. Or another approach, shift+drag to a
> date to copy a new instance of an event to a different date.
>
> Devin.