Friday the 13th occurs once every 213 days. Most people are familiar with Friday the 13th and the superstitions surrounding it. I mean, there was an entire horror movie series that is based on Friday the 13th. (Everyone dies) But where does the superstition come from? Many people believe that the superstition of Friday the 13th being unlucky is accredited to King Philip IV of France. On Friday, October 13, 1307, King Philip IV had hundreds of the Knights Templar arrested for various illegal activities. The Knights Templar were a powerful religious and military order formed to defend the holy land and had many valuable financial resources. It is said that the reason King Philip IV arrested and executed the Knights was to obtain their riches. Whether it is true or not, remains a mystery.
Some other more recent things that have happened to add to the unlucky superstition of Friday the 13th:
The German bombing of Buckingham Palace. (September 13, 1940)
The murder of Kitty Genovese in Queens, New York. (March 13, 1964)
The Bhola Cyclone that killed more than 300,000 people in Bangladesh, also the worlds deadliest weather event. (November 13, 1970)
The death of rapper Tupac Shakur. (September 13, 1996)
https://www.history.com/topics/folklore/friday-the-13th By Dillon Landfried - Sep 11, 2019