Another festival back this year after last year's Irene-related armaggeddon is the Charlie Parker Jazz Festival, which expands to three nights this year in honor of its 20th anniversary. Things kick off tonight at Marcus Garvey Park with Miguel Atwood-Ferguson's Bird With Strings, followed by an afternoon show tomorrow featuring Roy Haynes, Rene Marie, Derrick Hodge, and Erimaj. Then on Sunday, things move down to the traditional spot at Tompkins Square Park - across the street from Bird's flat on Ave B - with a lineup including Gregory Porter, Patience Higgins' Sugar Hill Quartet, Andy Milne and Dapp Theory, and Sullivan Fortner. All shows are free, and rain-or-shine.