The Wareham Village Association will celebrate “Christmas on Main Street” next Saturday from 10 to 3 p.m. along Main Street, from the Narrows Crossing Restaurant to the Old Company Store. The Christmas parade will assemble on Merchants Way and step off at 3 p.m. The parade will proceed down Main Street and Elm Street and then end at the Tremont Nail Co. complex. A tree-lighting ceremony will be held after the parade.