San Francisco, United States

San Francisco follows Pacific Standard Time (PST) at UTC−8 and PDT at UTC−7. It shares the same clock as Los Angeles, Seattle, and Silicon Valley.

A 9 AM all-hands in San Francisco is noon in New York, 5 PM in London, and 2 AM the next day in Tokyo. Tech companies headquartered here manage engineering teams distributed across continents, making timezone-aware scheduling an art form.

As the historic heart of the tech industry and home to countless startups and venture capital firms, San Francisco’s business rhythms set the pace for global technology innovation.