Because Christmas was in December and Easter was in April(ish), I thought that Jesus' whole life was lived in that time frame. He was born on Christmas, then BAM! turned into an adult a few month later.
You know, because he's God and all, and when you're a kid, that's the same as magic.
A childhood belief about characters

others believed things like this
- I used to believe the Christ was born
on Christmas Day and crucified the
following Easter.— William Golding - I was told that for every christmas carol i sang before christmas time santa would give me one less present!— K
- when i was little i thought that jesus delivered presents on christmas not santa .— gaby
- When i was little, I used to send Jesus birthday cards on christmas and thought he would read them in heaven.Anon
- How could Baby Jesus be born on Dec 25th, get tall, grow a beard and then die, all by Easter. Whew!— Joe
- I used to think it was against international law, religious principles, etc. To be born on Christmas Day. :PAnon