Time difference between San Francisco and London

Does the gap change?

The gap isn't fixed. San Francisco and London both use daylight saving time, but they change their clocks on different dates, so the difference moves during the year:

• From around October 25, 2026: London ahead by 7 hours
• From around November 2, 2026: London ahead by 8 hours
• From around March 15, 2027: London ahead by 7 hours
• From around March 28, 2027: London ahead by 8 hours

Best time to meet

Normal office hours in London and San Francisco don't overlap. The most workable window is 7 AM to 2 PM in San Francisco, which is 3 PM to 10 PM in London, with one side starting early or finishing late.

For a recurring meeting, it's fairest to rotate which city takes the inconvenient slot.

City details

• Time zone and daylight saving in San Francisco
• Time zone and daylight saving in London

San Francisco to London, hour by hour

San Francisco		London
12 AM	Night	8 AM	Early or late
1 AM	Night	9 AM	Work hours
2 AM	Night	10 AM	Work hours
3 AM	Night	11 AM	Work hours
4 AM	Night	12 PM	Work hours
5 AM	Night	1 PM	Work hours
6 AM	Night	2 PM	Work hours
7 AM	Early or late	3 PM	Work hours
8 AM	Early or late	4 PM	Work hours
9 AM	Work hours	5 PM	Early or late
10 AM	Work hours	6 PM	Early or late
11 AM	Work hours	7 PM	Early or late
12 PM	Work hours	8 PM	Early or late
1 PM	Work hours	9 PM	Early or late
2 PM	Work hours	10 PM	Night
3 PM	Work hours	11 PM	Night
4 PM	Work hours	12 AM (Thu)	Night
5 PM	Early or late	1 AM (Thu)	Night
6 PM	Early or late	2 AM (Thu)	Night
7 PM	Early or late	3 AM (Thu)	Night
8 PM	Early or late	4 AM (Thu)	Night
9 PM	Early or late	5 AM (Thu)	Night
10 PM	Night	6 AM (Thu)	Night
11 PM	Night	7 AM (Thu)	Early or late

Based on today's clocks. Work hours are 9 AM to 5 PM.