Simi Valley is 8 hours behind London. London is UTC+1. Simi Valley is UTC-7.
London on 15 October 2026: sunrise 07:24, sunset 18:07, day length 10 h 43 min.
Simi Valley on 15 October 2026: sunrise 07:00, sunset 18:20, day length 11 h 20 min.
For London and Simi Valley: The next clock change in London is 1 hour back on 25 October 2026 at 02:00, from UTC+1 to UTC+0.
For Simi Valley and London: The next clock change in Simi Valley is 1 hour back on 1 November 2026 at 02:00, from UTC-7 to UTC-8.
| Change |
|---|
| The gap changes on 25 October 2026 at 02:00, when clocks in London move back 1 hour. |
| The gap changes on 1 November 2026 at 02:00, when clocks in Simi Valley move back 1 hour. |
| The gap changes on 14 March 2027 at 02:00, when clocks in Simi Valley move forward 1 hour. |
| The gap changes on 28 March 2027 at 01:00, when clocks in London move forward 1 hour. |
| The gap changes on 31 October 2027 at 02:00, when clocks in London move back 1 hour. |
| View | 09:00 to 17:00 |
|---|---|
| From London | London and Simi Valley have no hour that is 09:00 to 17:00 in both cities. |
| From Simi Valley | Simi Valley and London have no hour that is 09:00 to 17:00 in both cities. |
| London | Simi Valley |
|---|---|
| 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 |
| City | Longest day | Shortest day |
|---|---|---|
| London with Simi Valley | 21 June 2026, 16 h 38 min | 21 December 2026, 7 h 50 min |
| Simi Valley with London | 21 June 2026, 14 h 27 min | 21 December 2026, 9 h 52 min |
| City | Date | Holiday |
|---|---|---|
| London and Simi Valley | 25 December 2026 | Christmas Day |
| London and Simi Valley | 26 December 2026 | Boxing Day |
| Simi Valley and London | 11 November 2026 | Veterans Day |
| Simi Valley and London | 26 November 2026 | Thanksgiving Day |