Are you crazy? Don't EVER EVER respond with any type of personal information to anyone who asks over the phone. Not a birthday, not an email address, NOTHING. Good grief ... then people wonder how their identities are stolen. All it takes is a few pertinent bits of information gathered here and there and, voila! You're the target chosen. Why on earth would you ever supply a random caller with any information at all? Duh ...
I get calls for some lady who must've used to have my number that often comes from the north US so I figured this was another person looking for her. Nope. Not this time. They asked about a survey I filled out (which I have filled out surveys recently so this wasn't too odd) but then they said I'd left comments about wanting a job, I said "...no" and they replied with "Oh. Sorry." Very odd.