So obviously it would be cool to say your birthday is on the 1st January of whatever year. But in the US theres twins who were born in different years. Madison Lewis was boen at 11.59 31/12/2010 and her brother Everette was born at 12.01 01/01/2011.
They wern't due until late January and mom went into labour early. Theres a part of me thinks the Doctor who delivered them, purposely waited until the stroke of midnight to get the other baby out haha.
Anyway its a nice story I think, and when they are much older they can tell that as a cool story :)