UK to San Francisco Time Converter
About this conversion
San Francisco is on Pacific Time, the same as Los Angeles. It is normally eight hours behind the UK, and seven hours behind in the weeks when only one side has changed its clocks.
San Francisco and Silicon Valley are home to many technology companies with offices in London, so UK and Bay Area teams often split the working day: the UK late afternoon overlaps with the California morning. A 17:00 UK meeting is 09:00 in San Francisco, which is usually the last slot that suits both.
When the time difference changes
Changes over the next two years, from daylight saving on either side.
- Sunday, 25 October 2026: San Francisco becomes 7 hours behind UK.
- Sunday, 1 November 2026: San Francisco becomes 8 hours behind UK.
- Sunday, 14 March 2027: San Francisco becomes 7 hours behind UK.
- Sunday, 28 March 2027: San Francisco becomes 8 hours behind UK.
- Sunday, 31 October 2027: San Francisco becomes 7 hours behind UK.
- Sunday, 7 November 2027: San Francisco becomes 8 hours behind UK.
- Sunday, 12 March 2028: San Francisco becomes 7 hours behind UK.
- Sunday, 26 March 2028: San Francisco becomes 8 hours behind UK.
Best time to call or meet
UK and San Francisco have no shared 09:00 to 17:00 working hours at present.
Common times
- 06:00 UK = 22:00 San Francisco (previous day)
- 09:00 UK = 01:00 San Francisco
- 12:00 UK = 04:00 San Francisco
- 15:00 UK = 07:00 San Francisco
- 17:00 UK = 09:00 San Francisco
- 20:00 UK = 12:00 San Francisco
UK to San Francisco hour-by-hour table
Highlighted rows fall within 09:00 to 17:00 on both sides.
| UK | San Francisco |
|---|---|
| 00:00 | 16:00 (previous day) |
| 01:00 | 17:00 (previous day) |
| 02:00 | 18:00 (previous day) |
| 03:00 | 19:00 (previous day) |
| 04:00 | 20:00 (previous day) |
| 05:00 | 21:00 (previous day) |
| 06:00 | 22:00 (previous day) |
| 07:00 | 23:00 (previous day) |
| 08:00 | 00:00 |
| 09:00 | 01:00 |
| 10:00 | 02:00 |
| 11:00 | 03:00 |
| 12:00 | 04:00 |
| 13:00 | 05:00 |
| 14:00 | 06:00 |
| 15:00 | 07:00 |
| 16:00 | 08:00 |
| 17:00 | 09:00 |
| 18:00 | 10:00 |
| 19:00 | 11:00 |
| 20:00 | 12:00 |
| 21:00 | 13:00 |
| 22:00 | 14:00 |
| 23:00 | 15:00 |
Related conversions
Clock change guides
- What Is Daylight Saving Time (DST)? A Plain-English GuideWhat daylight saving time is, how it works in the UK, Europe and the US, why it exists, its history, who uses it and the argument over scrapping it.
- Why Do the Clocks Go Back in October? The Real ReasonThe clocks go back in autumn to return the UK to GMT, so winter mornings are lighter. The history, the rule, what time it happens and what changes for you.
- When Do the Clocks Go Forward Again After Going Back?When the UK clocks go forward again after the autumn change, how long the UK stays on GMT, when evenings get lighter and how to remember to reset your clocks.
Frequently asked questions
What is 15:00 UK in San Francisco?
15:00 UK is 07:00 San Francisco at the moment. The answer can change by an hour when either side changes its clocks.
What are the shared working hours for UK and San Francisco?
At present none: UK and San Francisco have no shared 09:00 to 17:00 working hours at present.
When does the UK to San Francisco time difference change?
It next changes on Sunday, 25 October 2026, when the gap becomes 7 hours behind.
What is the time difference between London and San Francisco?
Eight hours for most of the year, seven hours in the weeks when the US and UK clocks are out of step.
What is the best time to call San Francisco from the UK?
From 16:00 to 18:00 UK time, which is 08:00 to 10:00 in San Francisco.