The time difference between Southern California and London is 7 hours. When it is 12:00 noon in Southern California, it is 19:00 in London. Southern California uses the America/Los_Angeles time zone (UTC-7), while London uses Europe/London (UTC+0).
| Detail | Southern California | London |
|---|---|---|
| Time Zone ID | America/Los_Angeles | Europe/London |
| UTC Offset | UTC-7 | UTC+0 |
| Abbreviation | PDT | GMT |
| DST Active | Yes — currently observing | No |
| Country | United States | United Kingdom |
| Region | California | Europe |
There are 1 overlapping business hours between Southern California and London (assuming 9:00–17:00 in each city). The ideal window for calls and meetings is:
Use this table to quickly convert any hour from Southern California time to London time. Rows highlighted in green indicate overlapping business hours in both cities.
| Southern California | London | |
|---|---|---|
| 00:00 | 07:00 | Night |
| 01:00 | 08:00 | Night |
| 02:00 | 09:00 | Night |
| 03:00 | 10:00 | Night |
| 04:00 | 11:00 | Night |
| 05:00 | 12:00 | Night |
| 06:00 | 13:00 | |
| 07:00 | 14:00 | |
| 08:00 | 15:00 | |
| 09:00 | 16:00 | Overlap |
| 10:00 | 17:00 | |
| 11:00 | 18:00 | |
| 12:00 | 19:00 | |
| 13:00 | 20:00 | |
| 14:00 | 21:00 | |
| 15:00 | 22:00 | |
| 16:00 | 23:00 | |
| 17:00 | 00:00 (+1 day) | |
| 18:00 | 01:00 (+1 day) | |
| 19:00 | 02:00 (+1 day) | |
| 20:00 | 03:00 (+1 day) | |
| 21:00 | 04:00 (+1 day) | |
| 22:00 | 05:00 (+1 day) | Night |
| 23:00 | 06:00 (+1 day) | Night |
Southern California is currently observing daylight saving time, while London is on standard time. When Southern California switches back to standard time, the difference between these two cities will shift by 1 hour.
The time difference is 7 hours. London is 7 hours ahead of Southern California.
Yes. One of these cities observes DST while the other does not, so the difference shifts by 1 hour when DST begins or ends.
The best window is between 09:00 and 10:00 Southern California time, which corresponds to 16:00–17:00 in London. Both sides fall within normal business hours.
Add 7 hours to Southern California time to get London time. Use the hour-by-hour table above for a quick reference.