I used to believe that the day added to February every leap year stayed on permanently, so the number of days in February would go up to 29, then 30, then 31, and on up indefinitely until it was the longest month imaginable.
A childhood belief about general

others believed things like this
- I used to believe that people born on leap year would only age once every 4 yearsAnon
- i could swear eleventeen was a number for the longest time -- it still sounds pretty convincing.— erin
- When i was little my mum convinced me that if a cat spat in my eyes i would go permanently blind. — Louise Atkinson
- My parents have the same birthday -- month, day, and year. I though all mom's and dad's had the same birthday.— Cait
- when i was little i believed that your social security number was the number you were born on the earth — christine
- I used to think that the word Great was added to Britain because they won the Second World War.— Age