Submission of Just the Birthday

Hi,

Considering the recent update presented by IMDB to all IMDBPro users that they can hide their year of birth (age), us contributors should be able to do this, too. I mean, we should be able to add the birthday of someone without entering the year, but the current system won't allow this. I believe it should be an optional thing, and if the year is blank the submission shouldn't be automatically rejected.