London is 6 hours behind Hanoi. Hanoi is UTC+7. London is UTC+1.
Hanoi on 15 October 2026: sunrise 05:51, sunset 17:32, day length 11 h 41 min.
London on 15 October 2026: sunrise 07:24, sunset 18:07, day length 10 h 43 min.
For Hanoi and London: Hanoi has no clock change scheduled in the next year. The last year with a seasonal offset change was 1975. The offset now is UTC+7.
For London and Hanoi: The next clock change in London is 1 hour back on 25 October 2026 at 02:00, from UTC+1 to UTC+0.
| Change |
|---|
| The gap changes on 25 October 2026 at 02:00, when clocks in London move back 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 Hanoi | Hanoi 15:00 to 17:00; London 09:00 to 11:00 |
| From London | London 09:00 to 11:00; Hanoi 15:00 to 17:00 |
| Hanoi | London |
|---|---|
| 00:00 | 18:00 (previous day) |
| 01:00 | 19:00 (previous day) |
| 02:00 | 20:00 (previous day) |
| 03:00 | 21:00 (previous day) |
| 04:00 | 22:00 (previous day) |
| 05:00 | 23:00 (previous day) |
| 06:00 | 00:00 |
| 07:00 | 01:00 |
| 08:00 | 02:00 |
| 09:00 | 03:00 |
| 10:00 | 04:00 |
| 11:00 | 05:00 |
| 12:00 | 06:00 |
| 13:00 | 07:00 |
| 14:00 | 08:00 |
| 15:00 | 09:00 |
| 16:00 | 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 |
| City | Longest day | Shortest day |
|---|---|---|
| Hanoi with London | 21 June 2026, 13 h 25 min | 22 December 2026, 10 h 51 min |
| London with Hanoi | 21 June 2026, 16 h 38 min | 21 December 2026, 7 h 50 min |
| City | Date | Holiday |
|---|---|---|
| Hanoi and London | 1 January 2027 | Tết Dương lịch |
| Hanoi and London | 5 February 2027 | Giao thừa Tết Nguyên Đán |
| London and Hanoi | 25 December 2026 | Christmas Day |
| London and Hanoi | 26 December 2026 | Boxing Day |