I've tried to set the birthdate on 2 users.
Setting one to Dec 27 1978, then Save.
The screen refreshes and shows Dec 31 1969.
I had another user that had a birthdate set to Mar 31 1973.
It was displayed ok.
When I changed it to Dec 27, 1978, the screen refreshed
and showed Dec 31 1969. From then on, I was unable to
change it back to the original Mar 31 1973.
Odd thing is, the database (using phpMyAdmin) shows the
correct birthdate being stored in the DB.
Dec 27 1978 and Mar 31 1973
using 2.14 RC1