David Strauss wrote:
"A.D." should probably change to "C.E." before the date of birthday. I would also use the term "birth date" instead of "birthday." At least in the U.S., people consider the birthday to be the /annual/ occurrence of a certain month and day. (e.g., My birth date is 11 March 1984, but my birthday is just 11 March.)
As far as AD/CE is concerned it's not really needed unless we have people coming who are more than 2000 years old. For that matter, age is not important among Wikipedians so why not omit the question altogether.
Ec