Probably a corrupt meeting in the calendar. I have found that
it is usually in a recurring appointment that has gone bad during
the week of the freeze (when did the freeze start?)

1) Open the Outlook but do not try to open the calendar.

2) Create a New folder (Calendar Test)

3) Do an advanced find on the old calendar and sort events
   by recurrence.

   - Press F3
   - Change the Look For: text box to Appointments and Meetings
   - Click on the Advanced tab
   - Click Field
   - Select All Appointment fields
   - Select Recurring
   - Condition: equals
   - Value: Yes
   - Click the Add to List button
   - Click Find Now

Drop and drag from advanced find listed events one at a time to
the new calendar, when you get to the corrupt item it will give
you an error message or it will hang. (delete this item)

Or if it is not a recurring (which our's always are) you could
perform the find for all and do the same as above...

Move all your calendar items from Calendar Test folder back to
original calendar (these are previously dragged over items).

I have been running Office 2000 on myWin98 machine for a
few years now. Yesterday my outlook froze. I realized that
all the functions in Outlook work except the calendar.
Once I enter my calendar Outlook then locks up and I must
end task to get out. I have unistaled and reinstalled
twice with the same results. Any suggestions out there.