Fact-Checking Friday the 13th: What's the History Behind ‘Unlucky’ Day

According to Western superstition, Friday the 13th is an unlucky day that occurs anytime the 13th day of a Gregorian month falls on a Friday. The spooky event happens at least once a year but can also occur up to three times a year depending on whether the month begins with a Sunday, leaving those who are superstitious—on edge.