19th century Gioachino Rossini by Henri Grevedon 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. The superstition seems to relate to various things, like the story of Jesus' last supper and crucifixion in which there were 13 individuals present in the Upper Room on the 13th of Nisan Maundy Thursday, the night before his death on Good Friday. Christian associations The Last Supper by Leonardo da Vinci It was a bad, unlucky day.' This major event in Norse mythology caused the number 13 to be considered unlucky. Dossey: 'Balder died, and the whole Earth got dark. The trickster god Loki, who was not invited, arrived as the 13th guest, and arranged for Höðr to shoot Balder with a mistletoe-tipped arrow. One source mentioned for the unlucky nature of the number '13' is a Norse myth about 12 gods having a dinner party in Valhalla.
