Saturday, 8 a.m.-noon: Our Local Bounty farmers market is open for the season, offering locally grown fruits and vegetables. St. Thomas Episcopal Church, 14300 St. Thomas Church Rd., Upper Marlboro. 301-627-8469 or stthomascroom.org/­ourlocalbounty.

Saturday, 9 a.m.-noon: Labyrinth walk, a medieval Christian practice of walking prayer. All ages and all religious affiliations are welcome. Historic Christ Church, 118 N. Washington St., Alexandria. Free. 703-549-1450 or www.historicchristchurch.org.

Saturday, 1 p.m.: The Rev. Donald Calloway discusses his book “Under the Mantle: Marian Thoughts from a 21st Century Priest,” about his journey from high school dropout to graduate of the Franciscan University of Steubenville, Ohio, the Dominican House of Studies in Washington and the International Marian Research Institute in Dayton, Ohio. Basilica of the National Shrine of the Immaculate Conception, 400 Michigan Ave. NE. Free. 202-526-8300 or www.nationalshrine.com.

Sunday, all day: The Adopt-a-Family school supplies drive will accept donations of backpacks, loose leaf paper, two-pocket folders and spiral and composition notebooks for use by those in need. Contributions by check are appreciated. A complete list of needed supplies is on the Web site. Cathedral of Saint Matthew the Apostle, Main Entrance, 1725 Rhode Island Ave. NW. 202-347-3215. www.stmatthewscathedral.org.

Sunday, 10 a.m.: A Tibetan Buddhist ceremony for long life and the transfer of consciousness with his Holiness Karma Kuchen Rinpoche. Kunzang Palyul Choling, 18400 River Rd., Poolesville. Suggested donation, $40. Register: www.tara.org. 301-710-6259.

Sunday, 10 a.m.: Members of the Cathedral Congregation talk with visitors about opportunities to support prison ministries. Coffee served after 8:45 and 11:15 a.m. worship services. Washington National Cathedral, Rear Nave, South Side, Wisconsin and Massachusetts avenues NW. Free. 202-537-6200 or www.nationalcathedral.org.

Sunday, 10:30 a.m.: “Sweethearts and Sweet Years”: PJ Library and the Jewish Food Experience present a mix of storytelling, arts and crafts and cooking projects for families, age 4 and older, to celebrate the Jewish day of love, Tu b’Av, and get ready for Rosh Hashanah. Jewish Community Center of Northern Virginia, 8900 Little River Turnpike, Fairfax. $10 per family. 301-230-7243 or pjlibrary@shalomdc.org or www.jewishfoodexperience.com.

Sunday, 1:30 p.m.: “Forged in Fire: Cathedral Ironwork.” A docent leads a cathedral tour of creatures, flowers and other items made by master smiths. Washington National Cathedral, Welcome Desk at walk-in visitor entrance, Wisconsin and Massachusetts avenues NW. $10, reservations suggested. 202-537-6200 or www.nationalcathedral.org.

Sunday, 4-7 p.m.: The 3-Force Band performs cool jazz for a hot summer day. St. Timothy’s Episcopal Church, 3601 Alabama Ave. SE. Tickets, $7.50; in advance, $5. Picnic supper, $7.50. 202-582-7740 or churchofsttimothys@verizon.net.

Sunday, 6 p.m.: Organist Russell Weisman performs. Basilica of the National Shrine of the Immaculate Conception, Crypt Church, 400 Michigan Ave. NE. Free-will offering. 202-526-8300, Ext. 120 or muslit@bnsic.org .

Most weekdays, 10:30 a.m. and 1:30 p.m.: Behind-the-scenes cathedral tour, for ages 11 and older. See gargoyles and stained-glass windows. Climb a lot of stairs to view the city from above. Bring a camera. Washington National Cathedral, Wisconsin and Massachusetts avenues NW. $15. 202-537-6200 or www.nationalcathedral.org.

Tuesday and Wednesday, 1:30 p.m.: A docent-led tour of the highlights of the cathedral, its history, architecture and artworks — plus a traditional English tea and a scenic view of the city from the cathedral tower. Washington National Cathedral, Docent Station at the Rear Nave, Wisconsin and Massachusetts avenues NW. $30, reservations required. 202-537-5581, www.allhallowsguild.org or misbister@cathedral.org.

Tuesdays, 6:30-8:30 p.m.: Grief Care Ministry offers support after the loss of a loved one.. Sessions continue through Oct. 29. Church of the Redeemer, 19425 Woodfield Rd., Gaithersburg. 301-926-0967. www.church-redeemer.org.

Wednesday, 4-5 p.m.: Club 45 invites rising fourth- and fifth-graders to hang out, play games and listen to a message from scripture. Led by summer intern Janie Hammaker. National Presbyterian Church, 4101 Nebraska Ave. NW. Free. 202-537-0800.

Wednesday, 7 p.m.: Bible study at St. Timothy’s Episcopal Church, 3601 Alabama Ave. SE. 202-582-7740.

Wednesday, 7:30 p.m.: Bible study at Wesley United Methodist Church, 5312 Connecticut Ave. NW. 202-966-5144 or www.wesleydc.org.

Thursdays, 7 p.m.: College students are invited to join a fellowship led by Quinn Fox, Craig Meek and Hilda Gore. The lives of the saints will be discussed. National Presbyterian Church, Youth House, 4101 Nebraska Ave. NW. Free. 202-537-0800.

Thursday, 7:30 p.m.: Bible study at St. Augustine’s Episcopal Church, the library, 600 M St. SW. Free. 202-554-3222 or www.staugustinesdc.org.

Friday, 6 p.m.: A family-oriented film. Bring a blanket, cushions, pillows or chairs, and a dinner. A trail mix snack bar will be provided. National Presbyterian Church, Jones Hall/school gym, 4101 Nebraska Ave. NW. Free. 202-537-0800.

Friday, 7:30-9:30 p.m.: The Nairobi Chamber Chorus from Kenya will perform a program of African folk music, American spirituals and western classical music. The City Church, 4100 River Rd. NW. Adults, $10; children, $5. 202-261-1830. www.nairobichamberchorus.org.

Next Saturday, 4 p.m.: The Lovejoy Group and guest vocalist and pianist Vince Evans perform music outdoors for swing, hand and Latin dancing. St. Luke’s Episcopal Church, 15th and P streets NW. Free. 202-262-7571.

— Compiled by Gerri Marmer

Send event name, dates, times, exact address, prices and a publishable telephone number at least one week before our Saturday publication day to Religion Events, The Washington Post, 1150 15th St. NW, Washington, D.C. 20071; or e-mail rpevents@washpost.com.