Halloween is an ancient festival, which has its roots in the Celtic festival of Samhain (Sah-ween), this was when the Celts (the ancient inhabitants of Great Britain) celebrated their New Year and the day they believed that the souls of those who had died that year progressed to the underworld. It was said to be a night when ghosts, demons and witches roamed the earth and people tried to placate them with offerings of nuts and berries. - See more at: http://www.learnenglish.de/culture/halloween.html#sthash.ckHC2lz7.dpuf