This is one of the oft-repeated problems with importing data from one
Outlook installation to the other. If you import native Outlook data, you
will lose the connection between contacts and birthdays. Instead, OPEN the
contacts to the new contact folder from the copied open .pst file.

Signature
Milly Staples [MVP - Outlook]
Post all replies to the group to keep the discussion intact. Due to
the (insert latest virus name here) virus, all mail sent to my personal
account will be deleted without reading.
After furious head scratching, Mitchell Greenberg via OfficeKB.com asked:
| I have copied by contact information from one computer to another,
| both Outlook 2003. I can see the birth date information within
| contacts, but it doesn't show up on the calendar. If I enter a new
| contact the birth date does come over to the calendar. How do I get
| all the contact birth dates to show up on my calendar?