Halloween Halloween Halloween or Hallowe'en (a contraction of Hallows' Even or Hallows' Evening), also known as Allhalloween, All Hallows' Eve, or All Saints' Eve, is a celebration observed in several countries on 31 October, the eve of the Western Christian feast of All Hallows' Day. It begins the three-day observance of Allhallowtide, the time in the liturgical year dedicated to remembering the dead, including saints (hallows), martyrs, and all the faithful departed. It is widely believed that many Halloween traditions originated from ancient Celtic harvest festivals, particularly the Gaelic festival Samhain; that such festivals may have had pagan roots; and that
All Saints' Day the past, did not celebrate All Hallows Day on this 1 November date, as extant historical documents attest that the celebration in Ireland took place in the spring: "... the "Felire" of Oengus and the "Martyrology of Tallaght" prove that the early medieval churches [in Ireland] celebrated the feast of All Saints on 20 April." A November festival of all the saints was already widely celebrated on 1 November in the days of Charlemagne. It was made a day of obligation throughout the Frankish empire in 835, by a decree of Louis the Pious, issued "at the instance of Pope