when I was a kid in the 90s there was this song that went "Monday, Tuesday, Wednesday, Thrusday, Friday, Saturday, EEE-ven on Sunday...every day of the week." I though that song was meant to teach kids the days of the week and when my kindergarten teacher asked us if we had ever heard a song about the days of the week, I proudly sang that song.
OK, so yeah. My teacher had to explain some stuff to me.
A childhood belief about songs

others believed things like this
- I once refused to believe in Thursday. I'd heard there were seven days in a week, but could only name six.Anon
- I thought that "tomorrow" was one of the days of the week— Frank
- I always thought that after 1999 it would be 1990 again, but with different months and days of the week
— optional - When I first heard Bruce Springsteen's song, "Born in the USA," I thought that the song was "Porn in the USA"Anon
- I used to think the song Bette Davis Eyes was called 'she's got better days besides'.— JJ Simpson
- I thought the Til Tuesday song said "Books are scary!", rather than "Voices Carry"Anon