I used to think you grew a certain amount on your Birthday, you ONLY grew on your birthday, and on your birthday all your clothes would also grow however much you grew so they would still fit.
I remember my mum saying I had grown out of some clothes quite a few times, and this used to puzzle me. Eventually I decided they had grown like me, just not enough for me to fit into them any more.
I was a weird kid - still kinda am!
A childhood belief about birthdays

others believed things like this
- I used to think you only grew on your birthday.Anon
- I used to believe that people only grew, physically and in age, on their birthday. — Aretia
- that as I grew up, my parents would "grown down," then I would be the Mom and Mom would be my child.Anon
- Up until I was almost 11, I thought that a birthday suit was a special outfit you wore only on your birthdayAnon
- I used to think that a birthday suit was a special outfit you wear on your birthday— Bri
- I used to believe that on your birthday, you didn't advance to your next age until you ate your birthday cake.— Casi