Why Friday the 13th is a mathematical inevitability(scientificamerican.com)

3 pointsby 1659447091vor 4 Monaten1 comments

https://www.scientificamerican.com/article/why-friday-the-13th-is-a-mathematical-inevitability/

1 comments

behehebdvor 4 Monaten

Or 12 / 7 > 1 so most maybe all years will have a F13