I didn't originally know that years were numbered. I was like WTF when I was in kindergarten and my teacher always read the date, and it ended with the number 2003, and I didn't know what that number was.
I think I finally figured it out when it became 2004 as December became January.
A childhood belief about general

others believed things like this
- when i was little i believed that your social security number was the number you were born on the earth — christine
- I used to believe there was a number "eleventeen". I could never quite work out where it went, though.— Matthew
- I used to think boys went "number two" with their pee pees. Anon
- When I was in kindergarten, I used to believe that they locked the teacher's in the teacher's lounge at night.Anon
- I used to believe that twenty was the largest number in the universe.— Bernardo Fernandez
- I used to think that any number with a decimal point in it was HUGE.— sm