We have changed how we collect and accept calendar information. Readers must now submit all items through our website. Go to events.contracostatimes.com, and click on "submit your event." You'll have to register at this point and enter your event, but you don't have to pay. Submitting your event in this way will ensure it is part of our easily searchable online database, as well as a candidate for space in our publications.

"Les Miz" at Woodminster. Woodminster Summer Musicals by Producers Associates Inc. presents "Les Miserables" 8 p.m. July 18, 19, 20. Woodminster Amphitheater, 3300 Joaquin Miller Road, Joaquin Miller Park, Oakland. $28-$59. 510-531-9597, www.woodminster.com.

Arroyo Viejo Creek Crew Work Day. Volunteers are needed to help clean up Arroyo Viejo Creek. Bring gardening gloves and tools if you have them, closed-toe work shoes, water and snacks. 9 a.m. to noon. July 19. RSVP appreciated. Meet at Oakland Zoo, 9777 Golf Links Road, Oakland. 510-632-9525 ext. 207, kdesmond@oaklandzoo.org.

Five Little Monkeys. The Bay Area Children's Theatre kicks off its 2014-2015 season for preschoolers and their families with the silly and jumpy fun of "Five Little Monkeys." 10:30 a.m. and 2 p.m. Saturdays. 10:30 a.m. and 4 p.m. Sundays. Through Aug. 10. Children's Fairyland, 699 Bellevue Ave., Oakland. $12 to $16 for park admission and play. 510-296-4433, www.bactheatre.org.

Peralta Hacienda Kids Club. Kids from 5 to 15 can play and experience Oakland's original rancho through traditional arts and hands-on activities: Make adobe bricks and corn husk dolls, learn about native plants and make seed balls, traipse through the creek area and participate in other nature-based tours. 2:30 to 5 p.m. Saturdays. Peralta Hacienda Historical Park, 2465 34th Ave., Oakland. Free. 510-532-9142, www.peraltahacienda.org.

Oakland Municipal Band. The Oakland Municipal Band's 103rd season celebrates summer with an outdoor concert series. Bring a lawn chair and picnic. 1 to 3 p.m. July 20. Lakeside Park Bandstand, 666 Bellevue Ave., Oakland. Free. 510-339-2818.

Jazz at the Chimes. Nuvo Chamber Trio plays adventurous jazz reinterpretations of classical pieces, world versions of jazz pieces, a blues suite and other musical surprises. 2 p.m. July 20. Chapel of the Chimes, 4499 Piedmont Ave., Oakland. $10 to $15. 510-654-0123, www.jazzatthechimes.com.

Senior Summer Day at the Zoo. The Oakland Zoo invites Oakland residents 65 and better to visit the zoo for free as part of the 5th annual Oakland Senior Summer Free Day series. Valid identification required. Must be an Oakland resident. 10 a.m. to 4 p.m. July 21. Oakland Zoo, 9777 Gold Links Road, Oakland. 510-632-9525, www.oaklandzoo.org.

Uptown Farmers Market. The Uptown Oakland Farmers' Market returns for the season with fresh local produce, music, kids' activities and more. 10 a.m. to 2 p.m. Wednesdays. Ordway Plaza, Kaiser Building, 2150 Valdez St., Oakland. 800-949-FARM, www.pcfma.com.

Teen 'Scape. Teens can beat the summer doldrums by hanging out with other teens playing video games, making crafts, meetings new friends and munching on light snacks at the Teen 'Scape at the library. 2 to 3:30 p.m. July 23. Rockridge Branch Library, 5366 College Ave., Oakland. Free. 510-597-5017, www.oaklandlibrary.org.

National Night Out Signup. It's never too early to plan your neighborhood block party, barbecue, ice cream social or whatever other outdoor event to bring your neighbors together for National Night Out 2014. Event is Aug. 5, but register your event with the city now. 510-238-3091, www2.oaklandnet.com/nno.