I am not sure. According to Wikipedia, he was born in
1984. Based on the articles I read about him, he was probably born in 1983 or 1984. Sadly, that is all I know about his date of birth. I’m sorry I cannot be of more help.
Edit: The website which mentions January 1st seems to mention January 1st at profiles of everybody whose month and day of birth are unknown, therefore it may not be true.
Edit #2: Wikipedia now says 1983, which I think may be the correct year.
Does anybody else know more?