https://www.siliconvalley.com/2021/05/17/covid-qa-so-when-exactly-do-californians-still-need-to-wear-a-mask/

California announced Monday it’ll continue to require everyone, including fully vaccinated individuals, to wear masks in most indoor settings until June 15, bucking the trend of other states across the nation quickly adopting looser guidance released last week by the U.S. Centers for Disease Control and Prevention.

The CDC on May 13 recommended that people fully vaccinated against COVID-19 no longer should have to wear masks or socially distance themselves, even when indoors or in large group settings.