Montauk will celebrate Earth Day on Saturday with a cleanup from 10 a.m. to noon starting at the Montauk Movie, where bags and gloves will be dispensed. Hosted by the Concerned Citizens of Montauk and the Group for the East End, the festivities will continue at 11:30 a.m. through 1:30 p.m. at the Montauk Playhouse Community Center with a program on everything you ever wanted to know about birds. There will be crafts for kids and materials for making bling-laden birdie gift bags.