We make jokes about Friday the 13th, but those who suffer from a fear of the number thirteen (triskaidekaphobia) or a fear of Friday the 13th (paraskevidekatriaphobia) may genuinely feel scared.
Although most of us would probably agree that superstition’s role isn't as strong as it used to be and more a source of amusement than anything else, there are still those who allow their fear over particular days or dates to prevent them from doing the things they would like to.
The reason why Friday the 13th came to be regarded as a day of bad luck has been obscured by time. The superstition surrounding this day may have arisen in the Middle Ages, 'originating from the story of Jesus' last supper and crucifixion' in which there were 13 individuals present in the Upper Room on the 13th of Maundy Thursday, the night before his death on Good Friday. While there is evidence of both Friday and the number 13 being considered unlucky, there is no record of the two items being referred to as especially unlucky in conjunction before the 19th century.
Some countries believe 13 is a lucky number and that our fear of Friday the 13th is “a constructed belief.” Good fortune can actually be had on this conceptually unlucky day because people tend to avoid traveling and participating in events. Research shows that it is actually less crowded and deals can be had for this date.
So take advantage of other people's fear and get yourself some deals and avoid the crowds.