In addition to tonight’s “An American Picnic with Fireworks by Grucci” for Southampton Fresh Air Home, here are more spectacular displays: Sag Harbor Yacht Club’s John A. Ward Independence Day Fireworks (July 1); East Hampton’s Main Beach Fireworks (July 4); Montauk’s Umbrella Beach Fireworks (July 4), and The Clamshell Foundation’s Fireworks Show (July 15; rain date, July 16). 1030 Meadow Lane, Southampton, N.Y., 11968. 27 Bay Street, Sag Harbor, N.Y. 11963. 101 Ocean Avenue, East Hampton, N.Y, 11937. 95 South Emerson Avenue, Montauk, N.Y., 11954. Three Mile Harbor, East Hampton, N.Y., 11937.