Halloween is stitched with cultural, religious, and occult traditions, referring to ancient Celtic festivals. It starts with the Celts celebrating the end of the harvest season on October 31, and on November 1, the Celts celebrate their new year, known as Samhain. To commemorate the event, Celts built huge sacred bonfires, where the people gathered to burn crops and animals as sacrifices to the Celtic deities. During the celebration, the Celts wore costumes, typically consisting of animal heads and skins, and attempted to tell each other's fortunes.