May day! May day!
- 1 - Release of Thomas Frazier's first report as Compliance Director
- 3 - Meet & Greet with Lynette McElhaney
- 4 - Art Murmur & First Friday
- 4 - Jack's Night Market in Jack London Square
- 4 - Victorian Garden Gala
- 5 - Cinco de Mayo Festival - 35th & International Blvd. in Fruitvale, 12 Noon to 4 p.m.
- 5 - Jane Jacobs Oakland Wiki Walk - Meet in front of the Lake Merritt BART Station main entrance at 1 p.m. FREE
- 5 - 2nd Annual TacoConf 2013 - Bike journey through Oakland in the search of the best taco/taco truck!
- 5 - Tina Tamale's Cinco de Mayo Party
- 6 - North Oakland Emergency Public Safety Meeting
- 7 - Temescal Dishcrawl
- 8 - Chief Howard Jordan unexpectedly resigns, leading to 3 chiefs in 3 days
- 8 - Bratton Report released
- 8 - Andrew Papachristos at Safe Oakland
- 9 - District 7 Budget Town hall Meeting
- 9 - Public Safety Town Hall for Youth
- 9 - Bike to Work Day (annual event)
- 10 - OPD Open House
- 10 - Oakland Internet Cat Video Festival Preview Screening at OMCA 7 p.m.
- 11 - Oakland Internet Cat Video Festival 3 p.m. to 10 p.m. at The Great Wall of Oakland at West Grand between Telegraph and Broadway
- 11 - Glenview Cottage Industries Show at Park Boulevard Presbyterian Church
- 11 - Oakland Nights Live
- 11 - Mayor Jean Quan proclaims the day "Bay Area Derby Girls Day" in Oakland.
- 12 - Mother's Day High Tea at Dunsmuir
- 13 - At Large & District 5 Budget Town Hall Meeting
- 15 - 19 - Bay Area Black Comedy Competition and Festival
- 17, 18, 19 - Festival of Greece at Greek Orthodox Cathedral of the Ascension
- 17 - Rob Bonta Gun Violence Hearing
- 18 - District 1 and District 3 Budget Town Hall Meeting
- 18 - Malcom X Jazz Festival at San Antonio Park
- 18 - Walk to End Poverty
- 18 - Free Boating Open House
- 18 - Reflections on the Plaza with James Rojas
- 18 - Scottish Rite Revealed Tour
- 18 - Sounds in Rockridge
- 19 - Jazz at the Chimes holds a Concert beginning at 2 p.m.
- 19 - District 2 and District 4 Budget Town Hall Meeting
- 20 - District 6 Budget Town Hall Meeting
- 20 - Place Keeping with James Rojas
- 22 - Street Wisdom
- 23 - Senior Town Hall Discussion
- 23 - City Slicker Farms Community Design Meeting 6-8p
- 25 - Compost Workshop
- 25 - Ghost Investigation
- 25 - Custom Car Show in Jack London Square
- 26 - Tweed Ride
- 30 - 7th annual Indie Awards
- Sometime in May - Construction of the MacArthur BART Transit Village begins
- Sometime in May - Opening of West Oakland BART station
- 21 - Amelia Earhart and navigator Fred Noonan departed Oakland Airport for what would become her final journey across the Pacific Ocean. They disappeared.
- 6 - Big fire in the Key System Mole
- 21 - Dedication of the Greek Orthodox Church of Assumption
- 3 - Electro-Alkaline Company, which became Clorox, founded
- 1 - Dietz Opera House burns down
- 30 - Dedication of GAR Civil War Monument
- 4 - Incorporation of the Town of Oakland