Current time in San Francisco

United States · UTC-8/UTC-7

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America/Los_Angeles

UTC offset

UTC-8/UTC-7

Daylight Saving

Yes — observed

Time zone ID

America/Los_Angeles

Business hours

9:00 AM – 6:00 PM PT (Monday–Friday)

About San Francisco's time zone

San Francisco operates on Pacific Time (PT), using PST (UTC-8) in winter and PDT (UTC-7) during daylight saving. As the heart of Silicon Valley and home to Apple, Google, Meta, Twitter, and hundreds of major tech companies, San Francisco's time zone defines the rhythm of the global tech industry. When San Francisco engineers push code at 5:00 PM PT, London wakes up to new software at 1:00 AM GMT, and Tokyo users see updates at 10:00 AM JST.

Best time to call San Francisco

Calling from	Recommended window
New York	12:00 PM – 9:00 PM ET
London	5:00 PM – 2:00 AM GMT
Singapore	12:00 AM – 9:00 AM SGT
Tokyo	1:00 AM – 10:00 AM JST

Did you know? Silicon Valley's PT time zone creates a daily 'handoff' pattern in global software development: San Francisco teams work during the day, hand off to European teams as SF goes to sleep (London is 8 hours ahead), who then hand off to Asian teams as Europe ends its day. This 'follow the sun' development model means some software projects are worked on 24 hours a day across time zones — with PT being the anchor point.

Cities in the same time zone