Friday the 13th is considered an unlucky day in Western superstition, occurring when the 13th day of the month in the Gregorian calendar falls on a Friday, which happens at least once every year but can occur up to three times in the same year. The origins of the superstition are unclear, but there are several theories. One theory is that the superstition comes from the Last Supper, where there were 13 people at the table, and Jesus was crucified on a Friday. Another theory is that the superstition comes from the Knights Templar, a medieval Christian military order, who were arrested on Friday the 13th in 1307.

Despite the superstition, both Fridays and the number 13 have long been regarded as a harbinger of good fortune in some cultures throughout history. For example, in pagan times, Friday was believed to have a unique association with the divine feminine. In Greece and Spanish-speaking countries, it is Tuesday the 13th that is considered a day of bad luck, while in Italy, it is Friday the 17th that is met with fear.

Overall, the point of Friday the 13th is that it is a day that many people consider unlucky due to various superstitions and cultural beliefs. However, it is important to note that these beliefs are not universal and vary across cultures and individuals.