How to clear Date of Birth?
If a user set date of birth, how can he clear it if he (or more often - she ) change his mind to expose it?
If I try to choose empty values after they have been set, I get error message
Date of Birth not valid.
Also, I think this would be great to have an option to mark date of birth or year of birth as hidden (as in AboutMe). Thus I could collect statistics painlessly for my users.