GMT to PST: UK–US West Coast time difference and best meeting times
London to San Francisco time · GMT/BST to PST/PDT
London and San Francisco share no 9-to-5 working hours for most of the year. The fairest 1-hour meeting is 16:30 in London = 08:30 in San Francisco.
London and the US West Coast are eight hours apart for most of the year, leaving little or no shared standard working time.
Time difference
San Francisco is 8h behind London
Most of the year; see below for other dates.
Shared working hours
None
Standard 09:00–17:00 days don't meet.
Fairest 1-hour meeting
16:30 in London = 08:30 in San Francisco
London stretches 30m, San Francisco stretches 30m.
How the gap changes in 2027
- 1 Jan – 13 Mar, 28 Mar – 30 Oct, 7 Nov – 31 Dec (344 days): San Francisco is 8h behind London. No shared standard hours; fairest meeting 16:30 in London = 08:30 in San Francisco.
- 14 Mar – 27 Mar, 31 Oct – 6 Nov (21 days): San Francisco is 7h behind London. Shared hours: 16:00–17:00 in London = 09:00–10:00 in San Francisco.
- London:
- UTC+0 standard, UTC+1 daylight saving
- San Francisco:
- UTC−8 standard, UTC−7 daylight saving
- 14 Mar: San Francisco clocks go forward 1h
- 28 Mar: London clocks go forward 1h
- 31 Oct: London clocks go back 1h
- 7 Nov: San Francisco clocks go back 1h
Hour-by-hour: London to San Francisco
Working hours are 09:00–17:00; night is 23:00–07:00.
| London | San Francisco1 Jan – 13 Mar, 28 Mar – 30 Oct, 7 Nov – 31 Dec | San Francisco14 Mar – 27 Mar, 31 Oct – 6 Nov |
|---|---|---|
| 00:00 | 16:00 (previous day) | 17:00 (previous day) |
| 01:00 | 17:00 (previous day) | 18:00 (previous day) |
| 02:00 | 18:00 (previous day) | 19:00 (previous day) |
| 03:00 | 19:00 (previous day) | 20:00 (previous day) |
| 04:00 | 20:00 (previous day) | 21:00 (previous day) |
| 05:00 | 21:00 (previous day) | 22:00 (previous day) |
| 06:00 | 22:00 (previous day) | 23:00 (previous day) |
| 07:00 | 23:00 (previous day) | 00:00 |
| 08:00 | 00:00 | 01:00 |
| 09:00 | 01:00 | 02:00 |
| 10:00 | 02:00 | 03:00 |
| 11:00 | 03:00 | 04:00 |
| 12:00 | 04:00 | 05:00 |
| 13:00 | 05:00 | 06:00 |
| 14:00 | 06:00 | 07:00 |
| 15:00 | 07:00 | 08:00 |
| 16:00 | 08:00 | 09:00 |
| 17:00 | 09:00 | 10:00 |
| 18:00 | 10:00 | 11:00 |
| 19:00 | 11:00 | 12:00 |
| 20:00 | 12:00 | 13:00 |
| 21:00 | 13:00 | 14:00 |
| 22:00 | 14:00 | 15:00 |
| 23:00 | 15:00 | 16:00 |
Tips for UK and US West Coast teams
- Both places use daylight saving time, but in opposite seasons or on different dates, so the gap changes during the year. Check the dates above before booking recurring meetings.
- With no shared standard hours, agree which side stretches its day, and rotate the inconvenient slot so it doesn't always fall on the same people.
- Keep live meetings for decisions that need discussion; use written handoffs at the end of each day for everything else.
Based on 09:00–17:00 working days in London and San Francisco, using 2027 clock-change dates. Real schedules vary, so confirm with your team.