For the 21th consecutive holiday season, Good Shepherd parish, Marine Park, will host a full-scale performance of Handel’s “Messiah.” It includes a choir, orchestra and soloists. Unlike similar performances in Lincoln Center, Carnegie Hall or other venues, the Good Shepherd event, on Sunday, Dec. 9 at 6 p.m., is free. Voluntary donations accepted. Good Shepherd’s music director is Michael Fontana, who also teaches music at St. Francis College in Brooklyn Heights. For more information, call 718-998-2800.