Halloween originated over 2,000 years ago among the ancient Celtic people in Ireland, who called it the Festival of Samhain. It was celebrated on November 1st and marked the end of summer and the beginning of winter. The Celts believed that on October 31st, the boundary between the living and the dead became blurred and the ghosts of the dead returned, so they wore costumes and had bonfires to scare away spirits. Carving pumpkins and making jack-o-lanterns evolved from an Irish folktale about a man named Jack who was doomed to wander at night with only a carved turnip lantern. These Halloween traditions spread to the U.S. with Irish immigration.