The thirteenth Friday of the month is seen as unlucky. The Norse myth about 12 gods having a supper party in Valhalla is one reason cited for the belief that the number "13" is unlucky. The uninvited trickster god Loki showed up as the 13th guest and planned for Hör to shoot Balder with an arrow that had a mistletoe tip on it. This significant occurrence in Norse mythology led to the number 13 being associated with bad luck. According to Dossey, "Balder died, and the whole Earth got dark. The whole Earth mourned. It was a bad, unlucky day."
Moreover, the belief appears to be connected to a number of other events as well, such as the last supper and crucifixion of Jesus, which took place in the Upper Room on the night before Good Friday, on the 13th of Nisan, when there were 13 guests there.
According to the study, this day is the most feared day and date in history since many people are impacted by a fear of it. Some people have such crippling fear that they refuse to engage in daily activities like conducting business, taking flights, or even driving.
Do you believe that Friday, the 13th, is an unlucky day?
Moreover, the belief appears to be connected to a number of other events as well, such as the last supper and crucifixion of Jesus, which took place in the Upper Room on the night before Good Friday, on the 13th of Nisan, when there were 13 guests there.
According to the study, this day is the most feared day and date in history since many people are impacted by a fear of it. Some people have such crippling fear that they refuse to engage in daily activities like conducting business, taking flights, or even driving.
Do you believe that Friday, the 13th, is an unlucky day?

