I found this macro which seems to be reasonably close to what I'm looking for.
www.datanumen.com
My question! How can I just run this macro when I want and it searches the calendar for any birthday's on that particular day?
I don't really want to setup a task for this to fire automatically.

How to Auto Send a Greeting Message to a Contact When His Birthday Is Today
If you hope that Outlook can automatically send a greeting message to the contact when his birthday is today, you can use the method introduced in this article.

My question! How can I just run this macro when I want and it searches the calendar for any birthday's on that particular day?
I don't really want to setup a task for this to fire automatically.