Submit your calendar item to ccnmontclarion@bayareanewsgroup.com or ccnpiedmont@bayareanewsgroup.com. Type “calendar item” in the subject line. Or mail to Montclarion / Piedmonter, 1516 Oak St., Alameda CA 94501. Please submit your item at least two weeks before event date.

Bookmark Bookstore Spring Sale. Friends of the Oakland Public Library’s semiannual, massive book sale features books of general interest, DVDs, CDs, records, songbooks, sheet music and comics. Every day will see an increase in savings. 10:30 a.m. to 5:30 p.m. April 8-10. The Bookmark Bookstore, 721 Washington St. in Oakland. 510-444- 0473, www.fopl.org.

Church Plant Sale. Montclair Presbyterian’s third annual fundraising plant sale features 49 varieties of heirloom tomatoes, succulents, cactuses, California natives, orchids, bromeliads, iris, herbs, vegetables, flowering perennials, drought-resistant plants, trees, seeds, bulbs, houseplants and much more. 10 a.m. to 4 p.m. April 9. Montclair Presbyterian Church, 5701 Thornhill Drive, Oakland 510-339-1131, www.mpcfamily.org.

Martial Arts Community Festival. Han Martial Arts holds a fundraising festival with 100 percent of the proceeds benefiting Children’s Hospital of Oakland featuring a Board Break-a-Thon, Korean cultural performances, taekwondo forms, sparring and group meditation. 10 a.m. to 2 p.m. April 9. Montera Middle School, 5555 Ascot Drive, Oakland. Free. 510-336-0699, www.hanmartialarts.com.

Urban Cycling 101 Class. Fun and entertaining workshop taught by a certified instructor with the League of American Bicyclists. Learn basic rules of the road, how to equip your bicycle, fit your helmet, take a bike on transit, and avoid crashes by riding predictably, visibly, and communicating with other road users by your actions and signals. No bike required. 5:30 p.m. April 12. Lakeview Branch. Oakland Public Library, Lakeview Branch, 550 El Embarcadero, Oakland. Free. 510-238-7344, www.oaklandlibrary.org.

Lawyers in the Library. Get one-on-one free legal advice and referrals with a volunteer lawyer. Register by phone starting one week in advance. 6 to 8 p.m. April 12. Oakland Public Library, Montclair Branch, 1687 Mountain Blvd., Oakland. Free. 510-482-7810, www.oaklandlibrary.org.

Shadow Puppet Theatre. Whether the folk tales come from Africa, China, or the Caribbean, Sean’s Shadow Puppet Theatre never fails to entrance the audience. His stories, handmade shadow puppets, and instruments from around the world demonstrate the power of tales in every culture. 11 a.m. April 13. Lakeview Branch. Oakland Public Library, Lakeview Branch, 550 El Embarcadero, Oakland. Free. 510-238-7344, www.oaklandlibrary.org.

Book Art Contest. The fourth annual book art contest challenges Oakland and Piedmont residents of all ages to create something new from a discarded book. Stop by or go online for details, including rules, flyer and photos of past entries. Entries due April 30. Montclair Branch Library, 1687 Mountain Blvd., Oakland. Free. 510-482-7810, www.oaklandlibrary.org, www.montclairlibrary.wordpress.com.

Beautiful Mess. What are we making? Whatever you want — and it’s going to be beautiful. And messy at this after school art program that allows kids to focus more on the process than the product, whether we’re using clay, watercolors, pencils, or odds and ends. 3:30 p.m. April 13. Oakland Public Library, Montclair Branch Library, 1687 Mountain Blvd., Oakland. Free. 510-482-7810, www.oaklandlibrary.org.

Make Thursdays. Tweens who like to build, create and make are invited to Make | Thursdays monthly class that features hands-on, fun, different activities. Best for 8- to 12-year-olds. 3:30 p.m. April 14. Oakland Public Library, Piedmont Avenue Branch, 80 Echo Ave., Oakland. Free. 510-597-5011, oaklandlibrary.org.