San Francisco to London: time difference and best time to meet

London is 8 hours ahead of San Francisco right now.

When it is 9:00 AM in San Francisco, it is 5:00 PM in London. The green band on each scale is the working day, 9 AM to 6 PM. Drag a scale until both bands sit on the red line.

Hours that work for both

Both cities are inside a 9-to-6 working day 9:00 AM–10:00 AM in San Francisco (5:00 PM–6:00 PM in London) — 1 hour in total.

San FranciscoLondon

12:00 AM8:00 AM

1:00 AM9:00 AM

2:00 AM10:00 AM

3:00 AM11:00 AM

4:00 AM12:00 PM

5:00 AM1:00 PM

6:00 AM2:00 PM

7:00 AM3:00 PM

8:00 AM4:00 PM

9:00 AM5:00 PM

10:00 AM6:00 PM

11:00 AM7:00 PM

12:00 PM8:00 PM

1:00 PM9:00 PM

2:00 PM10:00 PM

3:00 PM11:00 PM

4:00 PM12:00 AMnext day

5:00 PM1:00 AMnext day

6:00 PM2:00 AMnext day

7:00 PM3:00 AMnext day

8:00 PM4:00 AMnext day

9:00 PM5:00 AMnext day

10:00 PM6:00 AMnext day

11:00 PM7:00 AMnext day

both at work both awake

When the difference changes

San Francisco and London do not change their clocks on the same day, so the difference is not always 8 hours:

from Saturday, October 24, 2026 it is 7 hours (was 8 hours)
from Sunday, November 1, 2026 it is 8 hours (was 7 hours)
from Sunday, March 14, 2027 it is 7 hours (was 8 hours)
from Saturday, March 27, 2027 it is 8 hours (was 7 hours)

The scales above already follow these dates: drag to any day in the next two weeks and the difference shown is the one for that day.

Questions

What is the time difference between San Francisco and London?

London is 8 hours ahead of San Francisco today. San Francisco is on UTC−7, London on UTC+1. The difference changes on Saturday, October 24, 2026.

What is the best time for a call between San Francisco and London?

During working hours for both: 9:00 AM–10:00 AM in San Francisco (5:00 PM–6:00 PM in London). That is 1 hour of shared working time.

When it is 9:00 AM in San Francisco, what time is it in London?

5:00 PM. And when it is 9:00 AM in London, it is 1:00 AM in San Francisco.

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