The origins of Halloween can be traced back to ancient Celtic traditions. The Celts celebrated Samhain at the end of summer, which marked the beginning of winter and the time when spirits and ghosts were thought to return. They wore costumes, especially frightening ones, to ward off these spirits. Typical Halloween traditions include carving jack-o-lanterns from pumpkins, dressing up in costumes, and trick-or-treating. Jack-o-lanterns originated from an Irish myth about a man named Stingy Jack who was trapped between heaven and hell and given a lit turnip to light his way.