The Book Cellar, books for sale, basement, Warren Public Library, 11 a.m.-2 p.m.
Wilder Museum, Irvine, open, 1-5 p.m.
Chess club, Youngsville Library, 10 a.m.
Ninth Annual Henry Rouse Permanent Collection Juried Art Show, Suites at Rouse, 615 Rouse Ave., Youngsville. www.rouse.org.
Warren General Hospital Auxiliary accepting $5 donations to add an angel to the Angel Giving Trees set up at the WGH Cancer Care Center & WGH Outpatient Lobby.
Christmas Auction at Grand Valley Fire Hall, food available, 6 p.m.
"What's New for the Holidays" bazaar and lunch, Woman's Club of Warren, 310 Market St., Warren, 9 a.m.-4 p.m.
Warren High School Class of 1957, lunch, Christie's Downtown Pub & Grille, Pennsylvania Ave. W., Warren, 12:30 p.m.
'Model Railroad Month' displays at Richard Bradley's, 19 Hinkle St.; Richard Morris', 220 Elk Rd.; Tom Cappello's, 1414 Allegheny Ave.; and Ray Goetz', 46 Drumcliffe, 10 a.m.-5 p.m.
"Active Parenting Now," Forest-Warren Human Services, Hospital Dr., North Warren, 9 a.m.-2 p.m.
Annual meeting of the warren County Fair, 4-H Building, Warren County Fairgrounds, Pittsfield, 8 p.m.
Evangelist Carl Harris at Worship Center of First Assembly of God, 13393 Route 6, Clarendon, 10:30 a.m.
Slovenian Polka Boosters, Ridgway Moose Club, 2-6 p.m.