I thought the year of my birth (in my case, 1968) was some sort of code you were given when you were born. Whenever I was asked what my birthday was, I would give them the day and month. If they then asked what year, that was my clue to give them my code... 1968.
A childhood belief about general

others believed things like this
- My parents have the same birthday -- month, day, and year. I though all mom's and dad's had the same birthday.— Cait
- I used to believe that switching the light on and off was morse code to burglarsAnon
- I thought Maria Carey's 1998 ballad was 'I'd give my arms' instead of 'I'd give my all'.— Briony Maggs
- i thought I got one year older when my family sang the birthday song.— I am the ghost
- My birthday was on a different day every year, assigned by my parentsAnon
- I used to think that your birthday changed every year, and that your parents just decided what day it was.— Daniel