It kinda pisses me off when people say its the 14th of March hahah. i mean justin 说 it himself in an interview look here -->
link 你 just have to watch till the guy starts interviewing him hahah. and yeaah Wikipedia isnt reliable.
And for people saying Justin 说 his birthday is on the 14th, why would he say his birthdays on 2 different days..? prove it.