Presentation, "Agenda 21 to Agenda 2030: An Expose," by Hal Shurtleff, director and cofounder of Camp Constitution, 6 p.m. at Tang's restaurant, 60 North St. Free admisison; donations accepted. FMI: […]

Crown of Maine Balloon Fest, based at the Northern Maine Fairgrounds. For full schedule, visit crownofmaineballonfest.org.

Riverside Public Market, 11 a.m.-3 p.m. at the Riverside Pavilion.