Halloween is a celebration observed in many countries on October 31. The customs may have begun over 2000 years ago by the Irish Celts. November 1, marked the end of summer and the harvest and the beginning of winter where many crops “died” back and the days became dark and dreary. The Celts also believed that on the day before the new winter season the ghosts of the dead returned to earth. They set up feasts and set places for the dead. Children went door to door to collect food for the feasts. Costumes were worn to hide from some of the more evil spirits.