Time difference between London and San Francisco

Updated live in your browser · IANA time zone database (Europe/London, America/Los_Angeles)

London BST · UTC+1

San Francisco PDT · UTC-7

Difference 8 hours — San Francisco is behind London

Best time to call

Hours shown in London time. The two working days never overlap: when London is at its desk, San Francisco is asleep. Schedule at the edge of one side's day.

Hour-by-hour conversion

Daylight saving time note

London and San Francisco do not change their clocks on the same date. Between October 25, 2026 and November 1, 2026 the difference is 7 hours ahead of San Francisco — because London and San Francisco switch daylight saving time on different dates.

For the rest of the year the difference holds steady at 8 hours. Every time on this page is computed from the IANA database at the moment you load it, so the tables above already account for whichever side has switched.

Why the time difference exists

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