When I was in third grade my best friend made me believe all muslims actually celebrated their birthdays on new year's eve. I thought that was true for years after that!
A childhood belief about birthdays

others believed things like this
- when i was small i always for some reason, used to believe that all muslims wore turbans... — minal!
- Since I was born on the 4th of July, I really thought the entire country celebrated my birthday.— -Stoddard
- I used to think my birthday was a holiday everybody celebrated ]w]— Rin
- I used to think my birthday was a national holiday and the whole world celebrated it— アノン
- Ironically my parents were born on the same day; so growing up, I thought all parents had the same birthdays. Anon
- I used to believe that if i swallowed some Play-Doh and made a wish, my wish would come true.— Nadia