San Francisco uses the America/Los_Angeles time zone, with PST (UTC -8:00) during standard time and PDT (UTC -7:00) during daylight saving time.
America/Los_Angeles
PDT
PST
UTC -8:00
PDT
UTC -7:00
Follows local rules
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San Francisco runs on Pacific Time (PST/PDT). Silicon Valley and the SF tech ecosystem operate on this clock — SaaS, venture capital, most consumer tech HQs are all here. Business hours skew later than East Coast (10 AM starts are normal, calls run to 8 PM PT). Time zone gap with India (13.5 h behind IST winter) drives most engineering handover calls to happen in the 8-10 AM PT / 9-10:30 PM IST window.
North America runs five continental-US timezones (Eastern, Central, Mountain, Pacific, Alaskan) plus Newfoundland (a 30-minute offset from Atlantic Time — one of the few 30-minute timezones outside Asia). DST is nearly universal (except Arizona, Hawaii, most of Saskatchewan) and runs March → November. Business scheduling defaults to Eastern for multi-office US corporations regardless of headquarters.
These cities share the same time zone as San Francisco.
Major cities in United States — some may be in a different time zone.
Find when business hours overlap between your timezone and San Francisco.
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