Halloween carnival 6-8:30 p.m. Oct. 31, Calvary Chapel, 4065 Nelson Ave., Concord. Games, treats, face painting, inflatables, food, more. Free. 925-687-9084, www.calvarychapelconcord.org.
Halloween activities for kids 6-8 p.m. Oct. 31, Bethel Baptist Church, 3578 Clayton Road, Concord. Puppet show, games, crafts, raffles, refreshments, more. 925-798-7470.
Halloween fun 5-8 p.m. Oct. 28, Calvary Temple, 4725 Evora Road, Concord. Treats in car trunks, face painting, costume contest, hayrides, free. Carnival games, horseback riding $3 or $10 for wristband. 925-458-9100.
Trunk or Treat 6-8:30 p.m. Oct. 31, Grace Free Will Baptist Church, 2875 The Alameda, Concord. Cars decorated for Halloween with trunks of treats. Games, photos, movie, more. 510-825-5179, www.gracefwb.com.
Halloween Hoopla 6-8 p.m. Oct. 27, Fair Oaks Church, 1925 Risdon Road, Concord. Treats in trunks, petting zoo, games, food, inflatables. 925-687-4810, www.fairoaks.org.
Sister City benefit
Spaghetti dinner fundraiser, drop in 5-8 p.m. Nov. 2, Concord Senior Center, 2727 Parkside Circle. Benefits activities for 20th anniversary visit by sister city Kitakami, Japan representatives. $20, children 11 free. Tickets at the door or 925-671-3495.
Lung health fair
Information about lung health 8 a.m.-1 p.m. Oct. 27, John Muir Medical Center-Concord, 2540 East St. Time for questions, free screenings. Register: johnmuirhealth.com/classes, 947-4447.
Helping those in need
Monument Crisis Center Simple Supper, 6 p.m. Nov. 8, 2350 Monument Blvd., Concord. Soup, salad, more. Entertainment by The Kids for the Kids. Proceeds benefit center. $20. 925-825-7751, http://monumentcrisiscenter.org.
Craft supply sale
One-day sale 7:30 a.m.-3 p.m. Oct. 26, Concord United Methodist Church, 1645 West St. Quilt squares, fabric paint, wreaths, wooden trees, wooden crafts, craft books, doll heads, doll hair, more. 925-586-5260, www.cumc.org.
Mt. Diablo Astronomical Society stargazing 6-9 p.m. Oct. 26, Heather Farm Park, 505 N. San Carlos Drive, Walnut Creek. Observe moon, star clusters, nebulae, more. Free. Details: 695-3134, www.mdas.net, firstname.lastname@example.org.
Old West auction
Soroptimist International of Diablo Vista Ye Olde West Two-Bit Auction 6-10 p.m. Nov. 10, Back Forty Texas BBQ, 100 Coggins Drive, Pleasant Hill. Proceeds benefit Soroptimist programs. R.S.V.P. by Nov. 5. 925-827-1050.
VFW breakfast, crafts
Shoppers can visit Todos Santos Plaza stores, vote for favorite scarecrow through Oct. 28. Participating businesses fly orange, black balloons. www.concordtsba.org or www.cityofconcord.org/recreation/events/downtownevents.htm.
Children trick-or-treat at plaza businesses 3-5 p.m. Oct. 31.
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