Did you know: According to History.com, Halloween is thought to have originated with the Celtic festival of Samhain. The Celts celebrated their new year on November 1, and they believed that the night before, the line between the living and the dead became the thinnest. The practice of dressing up in costume was traditional during Samhain in order to ward off ghosts. Later, when Pope Gregory III designated November 1 “All Saint’s Day,” a day to honor all saints and martyrs, some of the traditions of Samhain were retained. The word “Halloween” is derived from “All Hallows Evening,” or the night before All Saint’s Day.