· Fireworks at Fairgrounds Park, off Cleveland Avenue, 1/2 mile north of Dual Highway, Hagerstown. Entertainment starts at 6 p.m., fireworks at 9:30. Fairgrounds Park. Call 301-739-8577, ext. 116, or go to www.hagerstownmd.org.
· Frederick's 4th, an Independence Day Celebration, at Baker Park, Frederick, Md. Festivities start at noon and include a chili cook-off, children's activities and several live performances. Blue Oyster Cult performs at 5:15 p.m. Fireworks start at dusk at the carillon area of Baker Park. For a complete schedule, go to www.celebratefrederick.com or call 301-228-2844.
· Fourth of July festivities, as part of the Cumberland Valley 21 Day Retreat Organization's Flag Retreat. Food and games at noon. Antique car show, 1 to 5 p.m. Flag retreat, 7 p.m. Concert by the Mercersburg Community Band at 8 p.m. Fireworks at 9:30 p.m. Pets, grilling and firecrackers (including sparklers) are prohibited. Memorial Park, 1 Memorial Drive, Chambersburg, Pa. Call 717-263-1302 for more information.