Night of the spirits; Feast of the Dead; New Year’s Eve; the year’s turning; Calends of winter; Summer’s End; one of the "joints of the year"; beginning of the barren time; day of divination; festival of the harvest; doorway into the new year; Mischief Night; Punky Night; Samhain; Nos Calan gaeaf; All Hallow’s Eve. These are all descriptions of one of the most important seasonal festivals of the Celtic world, the night of October 31, this evening, Halloween. In Wales it is known as Hollantide, in Cornwall Allantide, and in Brittany Kala-Goanv. Samain’s equivalent on the Christian calendar is All Saints’ Day, introduced by the Catholic church partly to supplant the pagan festival of the dead.