Friday the 13th
This is a day filled with many superstitions and bad luck. According to a study many people have a serious fear of this day. The disorder for fear of Friday the 13th is called friggatriskaidekaphobia. This comes from the Norse goddess for whom Friday is named and the fear of the number 13. The true origin of Friday the 13th is unknown but there are a few theories. A superstition surrounding the number 13 dates back to 1700 BC.
Some of the superstitions are that if 13 people dine together one will die within a year. The myth comes from both the last supper when Jesus dined with the 12 Apostles prior to his death, also a Norse myth, in which 11 close friends of the god Odin dined together only to have the 12-person party crashed by a 13th person, Loki, the god of evil and turmoil. Another consideration for the number 13 being cursed due to the number 12 is historically considered the number of completeness, while number 13 as been seen as detached from the number system 1-12. According to popular lore, there were 13 steps to the Gallows in which people were hanged. In 1881, an organization was formed called The Thirteen Club. This was an attempt to improve the reputation of the number 13. The members acted out all the superstitions such as walking under a ladder, spilling salt, allowing black cats to cross their path etc. Their efforts went without avail. The number 13 is still considered an unlucky number.
Friday is also considered an unlucky day. One theory is that Jesus was crucified on a Friday according to Christian Scripture. In the 14th century, Chaucer wrote The Canterbury Tales, which depicted Friday as an unlucky day. The publication from 1907 of Thomas W. Lawsons's novel "Friday the thirteenth" may also have played a part in considering Friday unlucky.
One great thing that came from this day being depicted as an unpleasant day came the great movie series with Jason Voorhees-Friday the 13th.
Whether you believe this is an unlucky day or you are someone who enjoys the day maybe you should not walk under that ladder. Or, you can always let that black cat cross your path.