My cousin is a year older than me. My birthday is on January 16th, hers is January 24th. When I was little I used to think that because my birthday was before hers, that somehow that I was older than her. No matter how my mother explained, for years I believed I was older.
A childhood belief about birthdays

you weren't the only one
26 of you believed this
- I used to believe that I was older than my brother because I was born in June and he was born in OctoberAnon
- i used to think that i was older than my dad because my birthday was before his— zara
- My cousic used to think he was older than me because his birthday was in June and mine was in December.— //**...Ethan...**\\