Flag retirement ceremony hosted by Meo Bosse Detachment Marine Corps League, 7 p.m. at Northern Maine Veterans Cemetary, Lombard Rd., Caribou. FMI: Vaughn Hardacker, 999-9077.

New Sweden Historical Museum open now through Labor Day, Monday-Friday 12-4 p.m., Saturday and Sunday 1-4 p.m.

Salmon Brook Historical Society's Benjamin Wilder and Aroostook Agricultural museums now open Wednesdays, 8-10:30 a.m., and Sundays, 1-4 p.m., through Labor Day.