San Francisco March 14, 2024 11:28 am Pi Day celebrations at the Exploratorium in San Francisco The earliest official pi celebration has special roots to the Bay Area, specifically San Francisco. Ginger Conejero Saab reports. US & World Videos 4:19 Watch ballet in San Francisco this weekend: ‘Van Manen' and ‘Broken Love' 1:33 Watch: City to honor East San Jose students for clean-air project 2:22 In the news: Dog attack in San Leandro, hacked crosswalk buttons, Warriors vs. Grizzlies 2:37 In the news: ‘Grandpa Vicha' case, warning for bank customers in the East Bay, new sculpture in SF 2:50 In the news: Dog-kicking incident, layoffs in the Bay Area, exclusive interview with Empire's Ghazi