JJ wrote:

If so, I don't know how. I can drag and drop specific appts from the
old to the new, but this is a time consuming process. I there was
even a way to drag or copy multiple enttries it would help.

Display the old calendar in a table view like By Category, select everything
with CTRL-A, then copy the selection to your default calendar.
--
Brian Tillman [MVP-Outlook]