is ther anyway possible that you can change your birthdate on gaia???? comment me if you know cuz my sister gave me this account and the birthday says 1/17/1992 and mine is 1/17/1987
Patience. This is a geezer guild. The likelihood of you being answered immediately is very slim here.
As for your question, I do not believe there is any way to change your birthday. The best you can do is just not have the year show up on your profile {which you already have set up}. If it actually bothers you that much that the proper birth date is not associated with your account, then you can always just start a new one and transfer everything to your new account. It's not as if new accounts cost anything so there isn't much reason not to set up your own account instead of settling for "hand me downs".