we used to have yabb forum software, the conversion from yabb to vbulletin didn't allow birthdates to be converted over.
occassionally when a user needs something updated in there profile and asks me for help, i need to "manually" change the birthday, because the settings page does not allow a value of 1900 (which all ppl in the conversion got defaulted too). so basically for me to save anythiing in there profile i have no choice but to use a random valid birthday (it would take too long to ask each user manually what the birthdays are)
Well, seeing as we're here, you don't need to ask. My DOB is in the post above yours!
I thought that if it were a site wide issue you would have a lot to change so didn't pursue it when I asked before. I guess hiding the DOB would be the answer.