13 is often seen as an unlucky number, in the west—about 10 percent of the U.S. population has a fear of this number. In Western superstition, fear of Fridays that fall on the 13th day of the month has been named "paraskevidekatriaphobia."
13 is often seen as an unlucky number, in the west—about 10 percent of the U.S. population has a fear of this number. In Western superstition, fear of Fridays that fall on the 13th day of the month has been named "paraskevidekatriaphobia."