Dale City farmers market, 8 a.m.-1 p.m., Dale City Commuter Lot, behind Center Plaza Shopping Center, Dale Boulevard. 703-670-7112, Ext. 227, www.pwcparks.org.
“9/11: We Remember,” features an I-beam from the World Trade Center, a Pentagon building fragment and other items in commemoration of the anniversary of Sept. 11, 2001. 9 a.m.-5 p.m. daily, National Museum of the Marine Corps, 18900 Jefferson Davis Hwy., Triangle. Free. 877-635-1775.
151st anniversary of Second Manassas, historian-led walking tours and history demonstrations are showcased throughout the park to commemorate the anniversary of the battle. 10 a.m., Manassas National Battlefield Park, 6511 Sudley Rd. $3. 703-361-1339 or www.nps.gov/mana.
“Enduring Legacy: Liberia Plantation 1825-2013,” an exhibit detailing the history of the plantation. 10 a.m.-5 p.m. Tuesdays-Sundays, Manassas Museum, 9101 Prince William St., Manassas. $5; seniors and children, $4; Baldwin students and their families, free. 703-368-1873.
“Artistic Impressions,” pottery by Sherri Johnson of Fairfax and digitally painted photographs by David and Jane Ernst of Springfield. 11 a.m.-5 p.m. daily through Sept. 2, Artists’ Undertaking Gallery, 309 Mill St., Occoquan. Free. 703-494-0584.
“Portraits and Patterns,” original block prints by Linda Larochelle. 11 a.m.-4 p.m. Tuesdays-Fridays, 11 a.m.-5 p.m. Saturdays and noon-5 p.m. Sundays, through Sept. 1, Loft Gallery, 313 Mill St., Occoquan. Free. 703-490-1117.
Canoe tour, a ranger leads a guided tour on Powell’s Creek. 6 p.m. Sundays, 9:30 a.m. Saturdays, Leesylvania State Park, 2001 Daniel K. Ludwig Dr., Woodbridge. $9, registration required. 703-583-6904.
“REmerging Technologies,” Don Hurlbert, GC Schow and Kathy Strauss use various photographic processes to express their personal vision. 10 a.m.-5 p.m. Mondays-Fridays, 1-5 p.m. Saturdays, through Sept. 19, Center for the Arts, Caton Merchant Family Art Gallery, 9419 Battle St., Manassas. Free. 703-330-2787 or www.center-for-the-arts.org.
Knights of Columbus charity bingo, p roceeds benefit the construction of the James the Apostle Seminary in El Salvador. 2 p.m., VFW Post 1503, 14631 Minnieville Rd., Dale City. $9. 703-494-6782.
Lake Jackson Mid-County Lions Club meeting, 6:30 p.m., Great American Steak and Buffet, 8365 Sudley Rd., Manassas. Free. 703-369-6791.
New Dominion Choraliers, 7:30 p.m.; registration for new members begins at 7 p.m. Old Bridge United Methodist Church, 3966 Old Bridge Rd., Woodbridge. $35 membership fee. 703-498-8906, 703-590-2147 or www.newdominionchoraliers.org.
Woodbridge Community Choir, members rehearse for their holiday concert season. No auditions required. registration, 7 p.m.; rehearsal, 7:30 p.m., Lutheran Church of the Covenant, 15008 Cloverdale Ave., Dale City. $30 membership fee. 703-491-1820 or www.woodbridgecommunitychoir.org.
“Two Visions,” sculptures by Francesca Di Lorenzo and paintings by Denise Shamoun Phalan. 11 a.m.-4 p.m. Tuesdays-Fridays, 11 a.m.-5 p.m. Saturdays and noon-5 p.m. Sundays, through Oct. 6, Loft Gallery, 313 Mill St., Occoquan. Free. 703-490-1117.
Prince William Purlers Knitting Guild, 7-9 p.m., Manassas Baptist Church, Java Rock Cafe, 8730 Sudley Rd., Manassas. Free. 703-791-6175.
Manassas Chorale open rehearsal, 7:30 p.m. Tuesdays, Manassas Baptist Church, 8730 Sudley Rd. 703-361-2146, Ext. 291, www.manassaschorale.org.
English Conversation Club, new speakers of English practice their skills. 11 a.m. and 7 p.m., Chinn Park Regional Library, 13065 Chinn Park Dr., Woodbridge. 703-792-4800.
Job search network group, 6-7:30 p.m., House of Mercy, 8170 Flannery Ct., Manassas. 703-659-1636.
Lake Ridge Toastmasters Club, Lake Ridge Club 8913. 7:30 p.m., Tall Oaks Community Center, 12298 Cotton Mill Dr. $62 membership fee. 703-491-3020.
Haunted Occoquan walking tour, paranormal investigator Kay Pietrewicz leads tours through the town. 8 p.m. Wednesdays-Fridays, 4 and 8 p.m. Saturdays, Occoquan Visitors Center, 200 Mill St. $12; children 6-12, $6; 5 and younger, free. 571-572-9410 or www.haunted-occoquan.com.
Lake Ridge Moms’ Club, open house. 7:30 p.m., Tall Oaks Community Center, 12298 Cotton Mill Dr., Lake Ridge. 703-550-9597.
Movie Night on the Lawn, “The Great Gatsby.” 8 p.m., Northern Virginia Community College, Mary Louise Jackson Amphitheater, 6901 Sudley Rd., Manassas. $2; NVCC students, faculty and staff, free. 703-530-3029.
Manassas farmers market,7:30 a.m.-1 p.m. Thursdays, Loy E. Harris Pavilion, 9201 Center St. 7:30 a.m.-1 p.m. Saturdays, Parking Lot B, West Street (next to the train station visitors center). 4-7 p.m. Tuesdays, Parking Lot F, Prince William and Main Streets. 703-361-6599 or www.visitmanassas.org.
Spanish chat, bring lunch and practice speaking Spanish. Noon-2 p.m., Central Community Library, 8601 Mathis Ave., Manassas. 703-361-8211.
Gainesville farmers market, 2-6 p.m. Thursdays, Marque at Heritage Hunt, 13550 Heathcote Blvd., Gainesville. 703-754-7711.
“Willy Wonka Jr.” auditions, actors ages 8-18 needed for Pied Piper Theatre’s November musical production. By appointment. Friday-Saturday, Center for the Arts, 9419 Battle St., Manassas. $10 nonrefundable audition fee; $200 participation fee if cast in the play. 703-330-2787 or www.center-for-the-arts.org.
Manassas Park farmers market, 3-7 p.m., Manassas Park City Hall, 1 Park Center Ct. 703-335-8800.
International Fall Family Fun Festival, rides, games and international cuisine. 6-11 p.m. Friday, 4-11 p.m. Saturday, Holy Family Catholic Church, 14160 Ferndale Rd., Dale City. Free. 703-670-8161.
Occoquan farmers market, 8 a.m.-noon, Mill Street parking lot, next to Route 123 bridge, Occoquan. 703-491-1918.
Kids fishing tournament, for ages 2-15. 9-11 a.m., Leesylvania State Park, 2001 Daniel K. Ludwig Dr., Woodbridge. Program, free; parking, $5. 703-583-6904.
Canoe tour, a ranger leads a guided tour on Powell’s Creek. 9:30 a.m. Saturdays, 10 a.m. Sundays, Leesylvania State Park, 2001 Daniel K. Ludwig Dr., Woodbridge. $9, registration required. 703-583-6904.
Fall vegetable gardening, master gardener Paul Gibson shares tips on extending the growing season and preparing for winter. 10 a.m.-noon, Chinn Park Regional Library, 13065 Chinn Park Dr., Woodbridge. Free, registration required. 703-792-7747.
Home buyer seminar, by real estate broker Bob Hummer. 10 a.m.-1 p.m., Strayer University, 13385 Minnieville Rd., Woodbridge. Free. 703-878-4866 or www.military-realestate.com.
Prince William Model Railroad Club Exhibit, featuring layouts modeled after Prince William and other points of interest. Club members will be available to answer questions. 10 a.m.-5 p.m. Saturday, noon-4 p.m. Sunday, Central Community Library, 8601 Mathis Ave., Manassas. Free. 703-361-8211.
“Herbs Through Thyme,” learn about and sample dishes that were popular in the 18th and 19th centuries. Event includes food, drink, historic commentary and a house tour. 11 a.m.-2 p.m., Ben Lomond Historic Site, 10321 Sudley Manor Dr., Manassas. $30, reservations required. 703-367-7872.
WWII Weekend, historians portray Axis and Allied soldiers. 11 a.m.-4 p.m. Saturday-Sunday, Rippon Lodge, 15520 Blackburn Rd., Woodbridge. Free. 703-499-9812.
“Muslim Journeys Bookshelf,” Amir Muhammad, curator for America’s Islamic Heritage Museum, discusses the history of Muslims in the United States. 2 p.m., Chinn Park Regional Library, 13065 Chinn Park Dr., Woodbridge. Free. 703-792-4800.