The fear of Friday the 13th is a combination of two separate fears — the fear of the number 13 and the fear of Fridays.
Thirteen is the number of people who were present at the Last Supper. That’s Jesus and his 12 apostles. Thirteen gets the bad rap because Judas, the apostle who betrayed Jesus, was the 13th person to arrive.
Combine that with Friday, the day Jesus was crucified, and you can see why Friday the 13th might not be a favorite, especially among Christians.
But for most folks, Friday the 13th is no more than a footnote to their week or an excuse to binge-watch the movie franchise that began in 1980.