San Francisco (Pacific) to London — Time Zone Converter
PT (UTC-7) → GMT/BST (UTC+1). London is 8 hours ahead relative to San Francisco (Pacific) right now.
San Francisco (Pacific)
Oct 7, 2026, 4:54 AM
London
Oct 7, 2026, 12:54 PM
Need the reverse? London to San Francisco (Pacific) →
Sample times — PT to GMT/BST
Sample conversions for today; daylight saving applied.
About San Francisco (Pacific) and LondonSan Francisco (Pacific) vs London time difference through 2026
The gap changes 4 times during 2026, because San Francisco (Pacific) and London switch to and from daylight saving time on different dates. Double-check meetings booked in the weeks around each switch.
Dates (2026) PT GMT/BST Difference Jan 1 – Mar 7 UTC−8 UTC London is 8 hours ahead Mar 8 – Mar 28 UTC−7 UTC London is 7 hours ahead Mar 29 – Oct 24 UTC−7 UTC+1 London is 8 hours ahead Oct 25 – Oct 31 UTC−7 UTC London is 7 hours ahead Nov 1 – Dec 31 UTC−8 UTC London is 8 hours ahead
Transition dates are the first full day on the new offset; clocks usually change overnight, between 1:00 and 3:00 local time.
Method & sources
Offsets and daylight-saving dates are computed from the IANA Time Zone Database through the JavaScript Intl API — the same rules your phone and computer use. The year table above was generated from those rules when this page was built; the live converter uses the rules installed in your own browser, so it stays correct if a country changes its clocks.
Page last updated: October 1, 2026
San Francisco (Pacific) vs London time difference through 2026
The gap changes 4 times during 2026, because San Francisco (Pacific) and London switch to and from daylight saving time on different dates. Double-check meetings booked in the weeks around each switch.
| Dates (2026) | PT | GMT/BST | Difference |
|---|---|---|---|
| Jan 1 – Mar 7 | UTC−8 | UTC | London is 8 hours ahead |
| Mar 8 – Mar 28 | UTC−7 | UTC | London is 7 hours ahead |
| Mar 29 – Oct 24 | UTC−7 | UTC+1 | London is 8 hours ahead |
| Oct 25 – Oct 31 | UTC−7 | UTC | London is 7 hours ahead |
| Nov 1 – Dec 31 | UTC−8 | UTC | London is 8 hours ahead |
Transition dates are the first full day on the new offset; clocks usually change overnight, between 1:00 and 3:00 local time.
Method & sources
Offsets and daylight-saving dates are computed from the IANA Time Zone Database through the JavaScript Intl API — the same rules your phone and computer use. The year table above was generated from those rules when this page was built; the live converter uses the rules installed in your own browser, so it stays correct if a country changes its clocks.
Page last updated: October 1, 2026
San Francisco to London is the Bay-Area-to-UK line that carries a large share of transatlantic tech collaboration. London is eight hours ahead, and the workable overlap is a San Francisco morning against a London late afternoon.
Frequently asked questions
What is the time difference between San Francisco (Pacific) and London?
Right now the offset is about 8 hours ahead (from PT to GMT/BST). Daylight saving rules differ by region, so use the converter and table above rather than memorising a single number year-round.
Does daylight saving affect San Francisco (Pacific) vs London?
Yes, whenever either region springs forward or falls back, the gap can shift by an hour. This page uses the IANA time-zone database so those transitions are applied automatically.
How do I schedule a meeting across the San Francisco Bay Area and the United Kingdom?
Pick a time in the converter, share both columns with attendees, and avoid early-morning or late-night slots on one side. The sample table lists common business hours in the source zone.
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