Offset
The time difference between Hanoi and London is 6 hours.
Hanoi (ICT) is ahead of London (BST).
ICT: UTC+7
BST: UTC+1
London is currently observing daylight saving time; Hanoi is not.
When to schedule
Business-hours overlap: 3 PM–5 PM in Hanoi (9 AM–11 AM in London).
Both teams are in working hours during this window on weekdays.
Suggested time: 4:00 PM Hanoi (10:00 AM London).
This window may shift by an hour during daylight saving time.
Public holidays in 2026
National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.
Vietnam
- New Year's DayThu, Jan 1
- Reunification DayThu, Apr 30
- Labour DayFri, May 1
- National DayWed, Sep 2
United Kingdom
- Good FridayFri, Apr 3
- Early May Bank HolidayMon, May 4
- Spring Bank HolidayMon, May 25
- Christmas DayFri, Dec 25
- St. Stephen's DayMon, Dec 28
About these zones
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Hanoi | London | Day |
|---|---|---|
| 12:00 am | 6:00 pm | -1 day |
| 1:00 am | 7:00 pm | -1 day |
| 2:00 am | 8:00 pm | -1 day |
| 3:00 am | 9:00 pm | -1 day |
| 4:00 am | 10:00 pm | -1 day |
| 5:00 am | 11:00 pm | -1 day |
| 6:00 am | 12:00 am | Same day |
| 7:00 am | 1:00 am | Same day |
| 8:00 am | 2:00 am | Same day |
| 9:00 am | 3:00 am | Same day |
| 10:00 am | 4:00 am | Same day |
| 11:00 am | 5:00 am | Same day |
| 12:00 pm | 6:00 am | Same day |
| 1:00 pm | 7:00 am | Same day |
| 2:00 pm | 8:00 am | Same day |
| 3:00 pm | 9:00 am | Same day |
| 4:00 pm | 10:00 am | Same day |
| 5:00 pm | 11:00 am | Same day |
| 6:00 pm | 12:00 pm | Same day |
| 7:00 pm | 1:00 pm | Same day |
| 8:00 pm | 2:00 pm | Same day |
| 9:00 pm | 3:00 pm | Same day |
| 10:00 pm | 4:00 pm | Same day |
| 11:00 pm | 5:00 pm | Same day |
Daylight saving time
London observes daylight saving time; Hanoi does not. The offset between the two zones changes when London transitions: on Sunday, October 25, 2026, clocks fall back from BST to GMT.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 5:15 AM
- Sunset
- 6:38 PM
- Day length
- 13h 22m
- Sunrise
- 4:46 AM
- Sunset
- 9:15 PM
- Day length
- 16h 30m
Daylight overlap: 7h 52m — 10:46 AM–6:38 PM in Hanoi (4:46 AM–12:38 PM in London). Both locations are in daylight during this window.
Cities in these zones
Other cities in Indochina Time
Other cities in Greenwich Mean Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Indochina Time
- HAN
- BKK
- DMK
- HPH
Airports in Greenwich Mean Time
- LCY
- LGW
- LHR
- LTN
- STN
- BHX
- EMA
- GLA
- PIK
- LBA
Related conversions
Common conversions
- What is 9:00 am Hanoi in London?
- 9:00 am Hanoi is 3:00 am London.
- What is 12:00 pm Hanoi in London?
- 12:00 pm Hanoi is 6:00 am London.
- What is 12:30 pm Hanoi in London?
- 12:30 pm Hanoi is 6:30 am London.
- What is 2:00 pm Hanoi in London?
- 2:00 pm Hanoi is 8:00 am London.
- What is 5:00 pm Hanoi in London?
- 5:00 pm Hanoi is 11:00 am London.
- What is 11:30 pm Hanoi in London?
- 11:30 pm Hanoi is 5:30 pm London.