Donny Most, the actor who played Ralph Mouth in the television sitcom Happy Days, made a guest appearance at St. Francis Hospital of Roslyn to videotape a public service announcement for the Gift of Life’s 40th anniversary. The Great Neck-based humanitarian organization that provides life-saving heart procedures to children from around the world is celebrating four decades of giving with help from St. Francis. That’s almost as long as the popular TV show has been running. Happy Days first aired in 1974 and recently turned 41.
