Someone I know (honest!) has his birthday on December 25
and spent a long time believing he was actually Jeseus.

Ollie

I used to believe that my birthday was when the new year started and everyone turned a year older on that day. Everyone else just had to wait to get older until my birthday (My birthday's actually in the middle of June).

Emma

I believed their was an Indian girl that lived in Canada that had the same birthday as me and was the same age as me, and it was really her in the picture on the birthday card she sent me. Coincidently, my grandfather used to tell be bedtime stories about an Indian girl. Hmm. Unfortunatly, I was a very skeptical child, and soon figured out that my grandfather had bought a birthday card for me while he was in Canada, and written me a letter as if he were the girl. Hence it was in his handwriting. I couldn't have been more than 6.

Anon

I used to think that your birthday changed every year, and that your parents just decided what day it was.

Daniel