Gaelic festival marking the start of winter
Samhain or Sauin is a Gaelic festival on 1 November marking the end of the harvest season in autumn and beginning of winter or the "darker half" of the year. It is also the Irish and Scottish Gaelic name for November. Celebrations began on the evening of 31 October, since the Celtic day began and ended at sunset. The festival originated in Ireland and it was widely observed throughout Ireland, Scotland, and the Isle of Man. Its Brittonic Celtic equivalent is called Calan Gaeaf in Wales.