Changing the age on profile

Does anybody know if you can change your age on this site after the initial profile creation? I'm older than when I created the account but I can't find out how to change the age.

If you go to your profile, and go to info, right above that area that you add info about yourself is a link to 'Edit Profile' and it has your birthday info in there. I think that changes it but I haven't needed to do anything with mine.

Thanks I appreciate it.