Most of the year, San Francisco is 8 hours behind London. During Mar 8–Mar 28, Oct 25–Oct 31, San Francisco is 7 hours behind London.
| London | San Francisco Most of the year | San Francisco Mar 8–Mar 28, Oct 25–Oct 31 |
|---|---|---|
| 12 AM | 4 PMprevious day | 5 PMprevious day |
| 1 AM | 5 PMprevious day | 6 PMprevious day |
| 2 AM | 6 PMprevious day | 7 PMprevious day |
| 3 AM | 7 PMprevious day | 8 PMprevious day |
| 4 AM | 8 PMprevious day | 9 PMprevious day |
| 5 AM | 9 PMprevious day | 10 PMprevious day |
| 6 AM | 10 PMprevious day | 11 PMprevious day |
| 7 AM | 11 PMprevious day | 12 AM |
| 8 AM | 12 AM | 1 AM |
| 9 AM | 1 AM | 2 AM |
| 10 AM | 2 AM | 3 AM |
| 11 AM | 3 AM | 4 AM |
| 12 PM | 4 AM | 5 AM |
| 1 PM | 5 AM | 6 AM |
| 2 PM | 6 AM | 7 AM |
| 3 PM | 7 AM | 8 AM |
| 4 PM | 8 AM | 9 AM |
| 5 PM | 9 AM | 10 AM |
| 6 PM | 10 AM | 11 AM |
| 7 PM | 11 AM | 12 PM |
| 8 PM | 12 PM | 1 PM |
| 9 PM | 1 PM | 2 PM |
| 10 PM | 2 PM | 3 PM |
| 11 PM | 3 PM | 4 PM |
London observes daylight saving time from Mar 29, 2026 to Oct 25, 2026, when clocks move forward one hour.
San Francisco observes daylight saving time from Mar 8, 2026 to Nov 1, 2026, when clocks move forward one hour.
Most of the year, San Francisco is 8 hours behind London. During Mar 8–Mar 28, Oct 25–Oct 31, San Francisco is 7 hours behind London.
London observes daylight saving time from Mar 29, 2026 to Oct 25, 2026, when clocks move forward one hour. San Francisco observes daylight saving time from Mar 8, 2026 to Nov 1, 2026, when clocks move forward one hour.
Most of the year: Both cities are in business hours at London 5 PM–6 PM (San Francisco 9 AM–10 AM). Mar 8–Mar 28, Oct 25–Oct 31: Both cities are in business hours at London 4 PM–6 PM (San Francisco 9 AM–11 AM).