Date of birth on profile

Does anyone know how to add birthday fields to profile. What's the best solution?

Thought I had it all worked out with profile_manager and simple_datepicker. Doesn't work when event_calendar is on too.

Any suggestions?

Edit: Kind of working with the 1970 fix, but would like a solution with selection fields to avoid datepicker mess like, breaks layout when selecting date, can't clear inputfield.