Halloween is celebrated in the United States on October 31st. Children and adults participate in traditions like trick-or-treating, wearing costumes, carving pumpkins, attending parties, and telling scary stories. The origins of Halloween stem from an Irish myth about a man named Stingy Jack who was doomed to wander eternally with only a hollowed turnip containing an ember to light his way, which later evolved into using pumpkins and became known as Jack O'Lanterns.