how to type in correct birthdate?

[Mmt]

........when I opened facebook account with this email[tabbennt@yahoo]...when asked to type my birthdate I typed incorrect birthdate thinking it didn't matter.now when I attempt to log on to facebook it asked for my birthdate.ofcourse I have no idea what I typed the first time.so I cannot give them the date they need to log me on.how can I change this to the correct birthdate?can you help or should I just forget about this? thanks

[Fireball]

oh dear you should have told THE TRUTH....YOU SHOULD FORGET THAT SITE ANYWAY...NO PRIVACY...USE EMAILS AND PHONES.