1. It is also known as Black Friday in some countries;

2. It is seen as an unlucky day in Western superstition;

3. The superstition only gained widespread distribution in the 19th century;

4. The fear of the number 13 has been given a scientific name - triskadekaphobia;

5. But the fear of Friday the 13th is known as paraskevidekatriaphobia;

6. It is unknown how the superstition to this day started, but both Friday and the number 13 are connected with the crucifixion of Christ. The last supper took part on a Thursday and there were 13 people at the table;

7. Friday has been seen as an unlucky day to undertake journeys or begin new projects since the 14th century;

8. The publication of Thomas W Lawson's novel, Friday, the Thirteenth, may have contributed to the superstition. It is about an unscrupulous broker who takes advantage of the superstition to create a Wall Street panic on a Friday the 13th;

9. On Friday, October 13, 1307, hundreds of Knights Templar were arrested in France, possible giving rise to the fear on that day.

DO YOU HAVE ANY UNUSUAL FRIDAY 13TH SUPERSTITIONS?