I learned a few tips & tricks when using Outlook 2003 that I wanted to share with you all.
Go to your Contacts folder and open up any contact.
The contact card opens to the default General Tab. Click on the Activities Tab and you will see all Sent, Saved & Deleted email messages for that contact.
While we are in different tabs, take a quick moment to look at the Details Tab. You will see a place to add a Birthday and/or Anniversary. By putting a date in there, Outlook will automatically add it to your Calendar. Cool eh?