The Druids (Celtic priests) also believed that on this day (exactly between the Autumnal Equinox and the Winter Solstice) the barriers between the human and supernatural worlds were broken, allowing demons, witches and lost souls to harass the living and play tricks on them. People tried to protect themselves from attack by disguising themselves as witches, devils and ghosts, and carved grotesque faces in things like pumpkins, which they kept illuminated by candlelight, to ward off evil spirits.

richmondparkchurch.org.uk an evangelical pentecostal church in Boscombe, Bournemouth, Dorset, UK.