World Timezones

London to Hanoi Converter

Compare Hanoi to London instead
London3:41 amMon, Jun 8
LondonBST
ENG, United Kingdom · UTC+1
3:41 amMon, Jun 8
12a
1a
2a
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
11p
HanoiICT
Vietnam · UTC+7
9:41 amMon, Jun 8
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
11p
12a
1a
2a
3a
4a
5a

Offset

The time difference between London and Hanoi is 6 hours.

6 hours

London (BST) is behind Hanoi (ICT).

BST: UTC+1

ICT: UTC+7

London is currently observing daylight saving time; Hanoi is not.

When to schedule

Business-hours overlap: 9 AM–11 AM in London (3 PM–5 PM in Hanoi).

Both teams are in working hours during this window on weekdays.

Suggested time: 10:00 AM London (4:00 PM Hanoi).

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.

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

Vietnam

  • New Year's DayThu, Jan 1
  • Reunification DayThu, Apr 30
  • Labour DayFri, May 1
  • National DayWed, Sep 2

About these zones

London uses Greenwich Mean Time (GMT, or BST). To call United Kingdom, dial +44.

Hanoi uses Indochina Time (ICT). To call Vietnam, dial +84.

Hanoi is approximately 5,750 miles northeast of London.

Quick reference

Full 24-hour conversion table — tap any time to open it in the converter.

LondonHanoiDay
12:00 am6:00 amSame day
1:00 am7:00 amSame day
2:00 am8:00 amSame day
3:00 am9:00 amSame day
4:00 am10:00 amSame day
5:00 am11:00 amSame day
6:00 am12:00 pmSame day
7:00 am1:00 pmSame day
8:00 am2:00 pmSame day
9:00 am3:00 pmSame day
10:00 am4:00 pmSame day
11:00 am5:00 pmSame day
12:00 pm6:00 pmSame day
1:00 pm7:00 pmSame day
2:00 pm8:00 pmSame day
3:00 pm9:00 pmSame day
4:00 pm10:00 pmSame day
5:00 pm11:00 pmSame day
6:00 pm12:00 am+1 day
7:00 pm1:00 am+1 day
8:00 pm2:00 am+1 day
9:00 pm3:00 am+1 day
10:00 pm4:00 am+1 day
11:00 pm5:00 am+1 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

London
Sunrise
4:46 AM
Sunset
9:15 PM
Day length
16h 30m
Hanoi
Sunrise
5:15 AM
Sunset
6:38 PM
Day length
13h 22m

Daylight overlap: 7h 52m — 4:46 AM–12:38 PM in London (10:46 AM–6:38 PM in Hanoi). Both locations are in daylight during this window.

Cities in these zones

Other cities in Indochina Time

Browse all cities to see the current local time anywhere.

Airports in these zones

Airports in Greenwich Mean Time

  • LCY
  • LGW
  • LHR
  • LTN
  • STN
  • BHX
  • EMA
  • GLA
  • PIK
  • LBA

Airports in Indochina Time

  • HAN
  • BKK
  • DMK
  • HPH

Related conversions

Common conversions

What is 9:00 am London in Hanoi?
9:00 am London is 3:00 pm Hanoi.
What is 12:00 pm London in Hanoi?
12:00 pm London is 6:00 pm Hanoi.
What is 12:30 pm London in Hanoi?
12:30 pm London is 6:30 pm Hanoi.
What is 2:00 pm London in Hanoi?
2:00 pm London is 8:00 pm Hanoi.
What is 5:00 pm London in Hanoi?
5:00 pm London is 11:00 pm Hanoi.
What is 11:30 pm London in Hanoi?
11:30 pm London is 5:30 am Hanoi, the next day.