Manhattan's own Charlie Parker Jazz Festival, produced by the City Parks Foundation, celebrates its 20th anniversary with free concerts in Marcus Garvey Park - on Friday, Aug. 24, "Bird with Strings," revisiting saxophonist Parker's project of 1949 and '50, and Saturday, Aug. 25, four acts including Roy Haynes' Fountain of Youth band and Rene Marie's Experiment in Truth. On Saturday, Aug. 26, singers Ernestine Anderson and Gregory Porter, and pianist Andy Milne's Dapp Theory take the free fest to Tompkins Square Park. From Aug. 17 through 23, leading up to those concerts, Ginny's Supper Club at Red Rooster, the Harlem School of the Arts and the New School for Jazz and Contemporary Music will present panels, workshops, a family jazz party and a theatrical presentation. See[www.cityparksfoundation.org/calendar/charlie-parker-jazz-festival](http://www.cityparksfoundation.org/calendar/charlie-parker-jazz-festival)for details.