This event features the latest and greatest in baby gear, mommy and me products and fashions, and parenting must-haves and includes seminars and gift bags. $55 & up, 917-488-8542, www.bigcitymoms.com ...

Get dirty and join the archaeologists to kick off the 2018 excavation season. Free, 415-561-4323, register at eventbrite.com ...

Join the Presidio and the Golden Gate National Recreation Area for a morning of stewardship projects (including one geared for families and children 9-years-old and younger) followed by a BBQ potluck ...

Ozzy Osbourne’s guitar icon puts on a special acoustic performance, book reading and Q. & A. session relating to his tome, Bringing Metal to the Children. But don’t bring the children; this event is ...

Learn the feed and care of your own starter and how different factors affect fermentation in this class by Cat Shimizu from the Mission district’s Sour Flour. Includes samples and suggested reading.

Saturday, April 20, 8:30 a.m.–1:30 p.m.

“Nonstop fun dance machine” Wonder Bread 5 brings a mix of disco and ‘80s sound, along with some classic rock and current pop hits. The Spazmatics also reach back to the ‘80s for their danceable music ...

Remembering the event that changed S.F. forever, civic and community members will gather at Lotta’s Fountain to commemorate the Great Earthquake and Fire of 1906. Free.

Explore the tastes, sounds, and creatures of the night during these two events benefiting the Academy and featuring dinner, speakers, live music, late-night bites, and an open bar. $75 & up, ...

This multimedia program interweaves storytelling by Perlman alongside personal photos, clips pulled from the Grammy-nominated Itzhak documentary, and music making with Perlman’s longtime pianist and ...

This epicurean extravaganza benefiting Meals on Wheels features an hors d’oeuvre and wine reception; a sit-down, three-course dinner; a lavish dessert reception; and live and silent auctions.