Many people believe that Friday the 13th is an unlucky day, that the 13th floor of a building is unlucky, or that the number 13 in general is unlucky. No one seems to know exactly why this came to be so, but there are many possible explanations.
One is that the superstition goes back to the Last Supper. There were 13 people at the meal, including Jesus Christ, and Judas was thought to be the 13th guest.
In some ancient European religions, there were 12 good gods and one evil god; the evil god was called the 13th god. And a meeting of witches, called a Sabbath, required at least 13 witches.
Friday has also long been considered unlucky, perhaps because Christ died on Friday. Since Friday and the number 13 are both considered unlucky, then Friday the 13th is considered the unluckiest day of all!
