Samhain step from guising to playing pranks". Playing pranks at Samhain is recorded in the Scottish Highlands as far back as 1736 and was also common in Ireland, which led to Samhain being nicknamed "Mischief Night" in some parts. Wearing costumes at Halloween spread to England in the 20th century, as did the custom of playing pranks, though there had been mumming at other festivals. At the time of mass transatlantic Irish and Scottish immigration, which popularised Halloween in North America, Halloween in Ireland and Scotland had a strong tradition of guising and pranks. Trick-or-treating may have come from the custom
Samhain several medieval texts. In "Serglige Con Culainn" ('Cúchulainn's Sickbed'), it is said that the festival of the Ulaid at Samhain lasted a week: Samhain itself, and the three days before and after. It involved great gatherings at which they held meetings, feasted, drank alcohol, and held contests. The "Togail Bruidne Dá Derga" notes that bonfires were lit at Samhain and stones cast into the fires. It is mentioned in Geoffrey Keating's "Foras Feasa ar Éirinn", which was written in the early 1600s but draws on earlier medieval sources, some of which are unknown. He claims that the "feis" of Tara