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," register at this point, then enter your event. You do not have to pay, and 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.

Lego Mania at the Library. Kids can design, build and explore with hundreds of Legos available from the Lego Club. 3 to 5 p.m. May 2. Piedmont Avenue Branch Library, 80 Echo Ave., Oakland. Free. 510-597-5011, oaklandlibrary.org.

Piedmont Gardens White Elephant Sale. Piedmont Gardens Senior Residence's annual white elephant sale features jewelry, art, china, kitchenware, lamps, furniture, books and much more. 9 a.m. to 2 p.m. May 3. Piedmont Gardens parking lot, 100 block Glen Avenue, between 41st Street and Linda Avenue, Oakland. Furniture information, 510-597-0167.

Beginning Genealogy. If you're not sure how to start research your family history, or if you're a pro and just want the most up-to-date information, a free introduction to genealogy class can help. 1 to 3 p.m. May 3. California Genealogical Society and Library, 2201 Broadway, Oakland. 510-663-1358, www.californiaancestors.org.


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OYO Benefit Gala. The 50-year-old Oakland Youth Orchestra celebrates its golden anniversary with a benefit gala concert, dinner and auction to raise money for its award-winning and far-reaching education and outreach programs. 5 p.m. May 4. Greek Orthodox Cathedral of the Ascension, 4700 Lincoln Ave., Oakland. $125. 510-444-0801, www.oyo.org

Bike to Work Energizer Stations. With over 300 Energizer Stations providing free beverages, snacks, cheers and more located in the Bay Area for Bike to Work Day 2014, there's no excuse for you to go any other way. Morning and evening commute hours. May 8. Find out the one on your route. www.youcanbikethere.com

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.

Free Computer Tutoring. Brush up on your computer basics at free computer tutoring. 1 to 3 p.m. Saturdays. 4 to 6 p.m. Tuesdays. Rockridge Branch Library. 5366 College Ave., Oakland. 510-597-5017, www.oaklandlibrary.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.

PHS 30th Reunion. Advance ticket purchase is a must for Piedmont High School's class of 1984 30th reunion celebration. 6 to 11 p.m. June 21. Piedmont Community Hall, 711 Highland Ave., Piedmont. $100. lpwillerup@ft.newyorklife.com or keithbarlow@sbcglobal.net.