The annual “Just Wild About Harry” Chapin tribute concert performed by Long Island songwriters and original bands will have a new venue this year: The Chapin Rainbow Stage in Huntington’s Heckscher Park, located off Main Street (Route 25A) and Prime Avenue. The free concert is slated for Sunday, July 21, at 7 p.m. Concertgoers are asked to bring donations of nonperishable food to support Long Island Cares, Inc., the regional food bank founded by Chapin in 1980.