My little sister use to get into arguments with me becuase I was born in November and she was born in July and so she thought that meant that she was older. She was really 2 years younger, but she didn't understand the concept of years.
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...**\\