The term Halloween (and its alternative rendering Hallowe'en) is shortened from All-hallow-evening, as it is the eve of "All Hallows' Day", which is now also known as All Saints' Day. It was a day of religious festivities in various northern European Pagan traditions, until Popes Gregory III and Gregory IV moved the old Christian feast of All Saints' Day from May 13 (which had itself been the date of a pagan holiday, the Feast of the Lemures) to November 1. In the ninth century, the Church measured the day as starting at sunset, in accordance with the Florentine calendar.
As in Ireland the exact customs involved with celebrating Halloween from ancient times to pre-industrialised Scotland are lost and lack primary documentation, to distinguish the ancient customs from the modern counterpart. The Witchcraft Act of 1735 contained a clause preventing the consumption of pork and pastry comestibles on Halloween although in modern times such treats are a popular treat for children; the act was repealed in the 1950s. Scotland's National Bard Robert Burns portrayed the varied custom for children to dress up in costumes in his poem "Hallowe'en" (1785).
