The Show Place

To add your birthday to your profile, simply click on the "User Control Panel" link at the top right side of the forum.
Then, in the options box on the left side, click on profile.
At the bottom of the page is where you add your birthdate. If you don't want your age shown, simply leave the year blank.
You can also add a website link, things that intrest you, Your occupation, and any messengers you have.
Click submit at the bottom and you're done.
Now, on your birthday, your name will show up in the birthday box at the bottom of the forum, and you should get an email.
Edit to add pic:

I'm gonna get a flashlight! That's what I need. Soon as I get the flashlight THEN I'll find the "options" whatever it is that Trucker says is there and OBVIOUSLY he wouldn't lie to us! Would he?

The options panel is on the left side of the screen. Just click on user profile...
If I can find it, I know you can!

Oh yeah!?! Then where's your birthday?? Huh, huh, huh??

pssst....don't tell anyone, but if you click the pic, it will give you a larger view.