I changed the time zone on my computer (I moved to a new time zone), and
found that all of my all-day appointments now span two days.

My first impulse was to change the time zone back, but now I have some
appointments showing the two-day span, while others are correct.

I have treid various time zone combinations with no success. Some of the
holidays seem to be permanently out of sync, no matter what time zone I try
to use.

How can I get back my correct calendar times?

I have Outlook 2003