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; 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.

Bike with Author Elly Blue. The Oakland Public Library celebrates National Bike Month with Elly Blue, author of "Everyday Bicycling," leading a scenic group bike ride starting off at the Cesar E. Chavez branch and ending at 81st Avenue branch with tips on organizing group rides, a book discussion, and more. 10:15 a.m. to noon. May 10. Cesar E. Chavez branch, 3301 East 12th St., Oakland. 81st Avenue branch, 1021 81st Ave., Oakland. 510-615-5812, www.oaklandlibrary.org.

Montclair Elementary Founders Day. The 88th annual Founder's Day Luncheon celebration features food, a music program, and a service awards ceremony honoring volunteers. 11:30 a.m. to 1 p.m. May 14. Montclair Elementary School, 1757 Mountain Blvd., Oakland. RSVP to wonny.mullen@yahoo.com or 510-339-6100.

Creek Crew Work Day. Grab your gardening gloves and help clean up the creek. Bring your closed-toe shoes, work clothes, water and snacks, and tools if you have them. 9 a.m. to noon. May 17. Arroyo Viejo Creek, Oakland Zoo, 9777 Golf Links Road, Oakland. RSVP encouraged. 510-632-9525, ext. 209, Chantal@oaklandzoo.org.

Peace Budget for a Peace Economy. Peace Action West's Executive Director Jon Rainwater leads a discussion on how to create a peace budget, and how it's time to re-thick our priorities. 2:30 to 4 p.m. May 17. Rockridge Library, 5366 College Ave., Oakland. Free. 510-339-1395, www.oaklandlibrary.org.

Celebrating Elephants Reception. The Oakland Zoo's 18th Annual Celebrating Elephants evening event to raise awareness and funds for the magnificent African elephant features Dr. Vicki Fishlock, Research Associate, Amboseli Trust for Elephants as inspirational guest speaker. Evening includes refreshments and auction items. 6 to 9 p.m. May 17. Oakland Zoo, Marian Zimmer Auditorium, 9777 Golf Links Road, Oakland. $40. 510-632-9525, ext. 122, www.oaklandzoo.org.

Dragonflies: Lives, Loves and Care. Dragonfly expert Kathy Biggs mesmerizes with stories about dragonflies and their fascinating lives. Also, learn how you can support their life cycle by creating habitat for them. 7 p.m. May 21. Dimond Branch Library, 3565 Fruitvale Ave., Oakland. Free. 510-501-3672, www.sausalcreek.org.