Something wrong then.
Mine is right here.
Birthdate:
If you select your birthday then other forum members will be able to see your birthday on the forum calendar and in your profile. Adding your year of birth is also optional. Month Day Year
January February March April May June July August September October November December 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
IT'S RIGHT HERE 
Additional Information
Biography