Birthdays is feature rich birthday reminder module that works with (but not exclusively with) Community Builder. Displays a list of upcoming birthdays with the ages of the people. Listed format is fully customizable, and names or usernames can be linked to Community Builder profiles or private messaging components. Dates can be server, website or GMT. 

This new BETA (v1.2.0) has all the features people have been asking for!

Download Birthdays Module