How did the superstition of Friday the 13th start?
Friday the 13th is considered unlucky because both the number 13 and the day of the week Friday are considered unlucky.
It is a combination of the superstition associated with the number 13 (Jesus was the 13th person at the Last Supper and the number is associated with irregularity) and the day of the week Friday (Black Friday, Jesus was crucified on a Friday, Eve tempted Adam on a Friday, etc.).
This superstition is perpetuated by pop culture like movies, greeting cards, etc.
It goes back a long way. Bad Luck: Friday the Thirteenth – The Scandinavian’s believed that the number 13 was unlucky due to the mythological 12 demigods being joined by a 13th, an evil one, who brought misfortune upon humans. It was also said that Christ was crucified on Friday and the number of guests at the party of the Last Supper was 13, with the 13th guest being Judas, the traitor.
