Halloween is a celebration on the night of October 31st. Halloween is a time of celebration and superstition. It is thought to have originated with the ancient Celtic festival of Samhain, when people would light bonfires and wear costumes to ward off roaming ghosts. Halloween originated as a celebration connected with evil spirits. Witches flying on broomsticks with black cats, ghosts, goblins and skeletons have all evolved as symbols of Halloween. They are popular trick-or-treat costumes and decorations for greeting cards and windows. They believed it was the time when ghosts and spirits came out to haunt, and the Celts would appease the spirits by giving them treats.