“WOODSTOCK: 3 DAYS OF PEACE & MUSIC” (1969-225 min.). Crosby, Stills & Nash, Jefferson Airplane, Janis Joplin, Jimi Hendrix. Joan Baez, The Who, Santana, Joe Cocker, Richie Havens, Arlo Guthrie, Country Joe McDonald, John Sebastian, Sha-Na-Na, Sly & the Family Stone and Ten Years After perform. For this director’s cut of the epic concert film, Michael Wadleigh has added 40 minutes of previously unseen footage. There will be one intermission. 5 p.m.