The above linked article talks about the deYoung museum’s new policy on free visits. It opens it up to more visitors from a wider variety of places. Here is a quick briefing of what is available as far as free days go.
Free general admission every Saturday for residents of the nine San Francisco Bay Area counties; requires valid photo ID or postmarked envelope bearing home address. (Included counties are: Alameda, Contra Costa, Marin, Napa, San Francisco, San Mateo, Santa Clara, Solano and Sonoma.)
Free First Tuesdays
Free general admission for all visitors the first Tuesday of every month.
Free general admission, and discounted special-exhibition admission, during normal museum hours (also dedicated Access Days) for any visitor with a disability plus one guest.
Museums for All
Free general admission during normal museum hours for all visitors receiving food assistance (SNAP benefits) with a valid EBT card.
Discover & Go
Free general admission, once per year, during normal museum hours for California library cardholders, who must go online (https://sfpl.discoverandgo.net) for a Discover & Go museum pass before visiting.