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

Oakland Maddie's Pet Adoption Days. Take home your next best friend for free as part of the 5th annual Maddie's Pet Adoption Days where cat and dogs, kittens and puppies will be matched with their qualified forever homes. Also, special activities for families: face painting, live music, and gift bags. 10 a.m. to 5 p.m. May 31 and June 1. Oakland Animal Services, 1101 29th Ave., Oakland. 510-535-5602, www.oaklandanimalservices.org.

Maine Coon Adoptions. Pick up your newest furriest friend for free -- and mixes and medium and short hairs, too -- at a Maine Coon cat adoption site as part of the 5th annual nationwide Maddie's Pet Adoption Days. 9 a.m. to 3 p.m. Saturday and 10 a.m. to 3 p.m. Sunday. Pet Food Express, 3868 Piedmont Ave, Oakland; or Kitty House, 2527 Carmel St, Oakland. 510-710-9250, www.MaineCoonAdoptions.com.

Beekeeping for Kids. The Rotary Nature Center and Alameda County Beekeeper's Association present this month's Oakland Nature Club looking at the world of honey bees, from queens and workers, to pollinating plants and making honey. For kids 5 - 13. 10 to 11:30 a.m. May 31. Rotary Nature Center, 600 Bellevue Ave., Oakland. $5. 510-238-3739, www.oaklandnet.com.

Make Your Own Scraper Bike. Tyrone "Baybe Champ," the scraper bike king will be on hand as you decorate and personalize your ride. Assorted colors of duct tape provided, as well as some supplies, but bring your own tinfoil, cardboard, candy wrappers, paint, etc. 11 a.m. May 31. Main Library, 125 14th St., Oakland. 510-238-3134, www.oaklandlibrary.org.

Oakland Civic Orchestra Concert. The Oakland Civic Orchestra, conducted by Artistic Director Martha Stoddard and Assistant Conductor Jason Oestenstad present its concert "Grace and Elegance." 4 p.m. May 31. Lake Merritt United Methodist Church, 1330 Lakeshore Ave., Oakland. Free. 510-597-5027.

Spring Cleanup and Planting Day. Volunteers are needed for Glenview Neighborhood Association's annual Spring Cleanup and Planting Day to beautify and improve Park Boulevard. Safety vests and tools provided. 8 a.m. to 1 p.m. May 31. Park Boulevard staging areas: Big Island, Delores and Hollywood, or Little Island, East 13th at East 38th, Oakland.

Older Americans Art Exhibit. As part of the city of Oakland Parks and Recreation's Malonga Casquelourd Center for the Arts presents "Bids Eat Broccoli; Older Americans Art Exhibit," featuring work of folks 55 years and older, there will be a demos, artwork sale, literary features and open mic. 2 to 4 p.m. and 6:45 to 9:15 p.m. June 6. Malonga Casquelourd Center for the Arts, 1428 Alice St., Oakland. 510-238-7217, malongacasquelourdcenter@gmail.com.