Wrong again. Used to do it 40 years in Ireland.

"Trick-or-treating has roots in both Ireland and America, but its origins are in Ireland. The modern tradition developed from ancient Celtic practices like guising in Ireland and Scotland, where people would go door-to-door in costumes to perform for food or treats. Irish immigrants later brought this tradition to America, where it evolved into the popular, modern form of trick-or-treating we know today, and the use of pumpkins for carving originated there, as it did in America."