London zone
GMT+1 (GMT+1)
San Francisco zone
PDT (GMT-7)
Difference
8 hours behind London
Business overlap
No 9-5 overlap
Working hours overlap
Each cell is one hour in London. Filled cells mark when 9 AM – 5 PM in London and San Francisco both apply.
0 hours per day
- London
- GMT+1
- San Francisco
- GMT-7
- Difference
- -8h
- Business overlap
- 0h
Hour-by-hour conversion
Each row shows the matching local time in San Francisco for an hour in London.
| London | San Francisco | Day | Window |
|---|---|---|---|
| 12:00 AM | 4:00 PM | previous day | — |
| 1:00 AM | 5:00 PM | previous day | — |
| 2:00 AM | 6:00 PM | previous day | — |
| 3:00 AM | 7:00 PM | previous day | — |
| 4:00 AM | 8:00 PM | previous day | — |
| 5:00 AM | 9:00 PM | previous day | — |
| 6:00 AM | 10:00 PM | previous day | — |
| 7:00 AM | 11:00 PM | previous day | — |
| 8:00 AM | 12:00 AM | same day | — |
| 9:00 AM | 1:00 AM | same day | — |
| 10:00 AM | 2:00 AM | same day | — |
| 11:00 AM | 3:00 AM | same day | — |
| 12:00 PM | 4:00 AM | same day | — |
| 1:00 PM | 5:00 AM | same day | — |
| 2:00 PM | 6:00 AM | same day | — |
| 3:00 PM | 7:00 AM | same day | — |
| 4:00 PM | 8:00 AM | same day | — |
| 5:00 PM | 9:00 AM | same day | — |
| 6:00 PM | 10:00 AM | same day | — |
| 7:00 PM | 11:00 AM | same day | — |
| 8:00 PM | 12:00 PM | same day | — |
| 9:00 PM | 1:00 PM | same day | — |
| 10:00 PM | 2:00 PM | same day | — |
| 11:00 PM | 3:00 PM | same day | — |
Best meeting windows
Standard 9 AM – 5 PM hours in London and San Francisco do not overlap. Plan calls for early London morning or late London evening, and rotate the burden between sides.
Tighter overlap is achievable by having the side with later working hours start earlier, or by treating the first and last hours of each side as flexible. The bar above marks every hour where both cities sit inside a 9 AM – 5 PM window.
About converting London time to San Francisco time
London follows the Europe/London time zone (currently GMT+1, GMT+1), while San Francisco follows America/Los_Angeles (currently PDT, GMT-7). San Francisco is 8 hours behind London right now.
Both cities observe daylight saving time. If their transition weekends differ, the offset shifts by one hour for a few weeks each spring and autumn.
Daylight saving transitions in 2026
London
- Spring forward · Sunday, March 29, 2026
- Fall back · Sunday, October 25, 2026
San Francisco
- Spring forward · Sunday, March 8, 2026
- Fall back · Sunday, November 1, 2026
Reverse this conversion
San Francisco to London
Open the converter
Plan a meeting between London and San Francisco
More conversions from London
Frequently asked questions
- How many hours is London from San Francisco?
- San Francisco is 8 hours behind London right now.
- What time is 9:00 AM London in San Francisco?
- 9:00 AM in London is 1:00 AM in San Francisco.
- What time is 5:00 PM London in San Francisco?
- 5:00 PM in London is 9:00 AM in San Francisco.
- When do London and San Francisco business hours overlap?
- Standard 9 AM - 5 PM working hours in London and San Francisco do not overlap. You will need an early or late call.
- Does daylight saving time change the difference between London and San Francisco?
- Both London and San Francisco observe daylight saving time. If their transition dates differ, the offset between them shifts by an hour for a few weeks each year.
Local time page
Time in London
Local time page
Time in San Francisco