Warren County Historical Society, 210 Fourth Ave., 8:30 a.m. to 4:30 p.m.
Warren Public Library, Market St., Warren, open, 10 a.m.-5 p.m.
Community lunch, free to the public, The Salvation Army, 311 Beech St., noon.
Rummage Sale sponsored by Altar/Rosary Society, St. Luke Catholic Church, 420 N. Main St., Youngsville, 9 a.m.-6 p.m.
Spencers: Theatre of Illusion, Library Theatre, 8 p.m. (723-7231)
Harvest Dinner, old-fashioned Thanksgiving dinner and more, Lottsville United Methodist Church, 4:30-7 p.m. (489-3408 or 964-8808).
Geocaching at Night, Chapman State Park, amphitheater, 6:30 p.m.
Haunted Halloween Open House & Trolley Tours, Warren County Historical Society, 210 Fourth Ave., Warren, 6-8:30 p.m.
Warren Art League fall art show, "Varied Visions," Crary Art Gallery, 511 Market St., Warren. Opening reception, 5-7 p.m. (www.crarygallery.org).
Retired women of GTE Sylvania (Osram), lunch, Dinner Bell, Frewsburg, N.Y., 1 p.m.; carpool, Big Lots, 11:30 a.m.
Harvest dinner, old-fashioned turkey dinner, Lottsville United Methodist Church, 4:30-7 p.m. (489-3408).