- The fear of Friday the 13th is called friggatriskaidekaphobia.
- Very little is known about why Friday the 13th is feared.
- Some historians believe that the superstitions started in the late 19th century when a biography of an Italian composer talked about the day he died, Friday the 13th.
- Others believe that the superstition has Biblical origins due to the fact that Jesus was crucified on a Friday and 13 guests were at the Last Supper before his crucifixion.
- Airlines have a reputation of having bad luck on Friday the 13th.
- There cannot be more than three Friday the 13th in a calendar year.
- For a month to have a Friday the 13th, it must begin on a Sunday.
- On Friday the 13th, 2029 an asteroid will fly by the Earth.