CT Open House Day — 10 a.m.3 p.m., Fort Griswold Battlefield State Park, Monument Street and Park Avenue, Groton; The Friends of Fort Griswold Battlefield State Park will greet visitors to the fort. people can climb the 166 steps to the top of the Groton Monument, tour the Monument Museum, or take a guided tour of the battlefield at 11 a.m. and 1 p.m.; free: (860) 445-0408. Juneteenth Festival — 11 a.m.3 p.m., Hempsted Houses, New London; music, dance, performances, and history, with activities and crafts for children; free.

Juneteenth — noon-4 p.m., OIC of New London County, 106 Truman St., New London; outdoor festival with music, artisans, crafts, vendors, food vendors and more; (860) 447-1731.

Groton Outdoor Market — noon5 p.m., Thrive55+/Groton Public Library parking lot, Route 117, Groton; Groton Public Library and Thrive55+ Active Living Center present their third annual market in conjunction with the Classic Car Cruise; craft vendors, antiques, food, baked goods for sale, book sale, more; (860) 441-6750.

2nd Annual Sea Music Festival — 10 a.m.-10 p.m., town of Essex; free except for $25 ticketed concert at 7 p.m.; ctseamusicfest,org.

See page 3.