Does Hanoi observe daylight saving time?

No. Hanoi stays on ICT (UTC+7) all year, so its clocks don't change.

Does London observe daylight saving time?

Yes. London is on BST (UTC+1) now, and its clocks go back 1 hour on Sun, Oct 25, to GMT (UTC+0).

What time is it in London when it's 9 AM in Hanoi?

3:00 AM in London, on the same day.

Hanoi to London Meeting Planner

London is 6 hours behind Hanoi right now. Their working days overlap for 2 hours today.

Hanoi · Vietnam

11:37 AM

Sun, Oct 18 · ICT

London · United Kingdom

5:37 AM

Sun, Oct 18 · BST · summer time

Best Meeting Times Between Hanoi and London

3:00 PM to 5:00 PM in Hanoi (9:00 AM to 11:00 AM in London). That's when both cities are inside working hours, 9 AM to 5 PM, giving 2 hours of overlap today.

Who's meeting

2 of 4 places

HanoiOrganizerVietnam ·11:37AMnow
LondonUnited Kingdom ·· summer time5:37AMnow

Add a city

Add up to 4 places by city, country, time zone or abbreviation, like Tokyo, India or JST. Press "/" to jump here.

Date in Hanoi

Working hours, everywhere

Best times to meet

Sunday, October 18, 2026, in Hanoi time.

3:00PMBest · OptimalWorking hours in Hanoi (15:00) and London (09:00).
4:00PMOption 2 · OptimalWorking hours in Hanoi (16:00) and London (10:00).
1:00PMOption 3 · GoodWorking hours in Hanoi (13:00); just outside working hours in London (07:00).

The whole day

Pick any slot in the Fit row, or use the arrow keys there, to make it the meeting time.

Each column is a one-hour slot of the first place's day. The Fit row grades how well the slot suits everyone; each row shows the local time and whether it's working hours there.
Fit
HanoiUTC+7
LondonBST
UTC	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16

Working hours (09–17)Just outside (07–09, 17–20)Late evening (20–23)NightFit: optimal, good, possible, poor

Your meeting

Hanoi3:00 PM UTC+7Sun, Oct 18
London9:00 AM BSTSun, Oct 18
UTC2026-10-18 08:00 UTC

What will it cost? Try the meeting cost calculator.

Time difference between Hanoi and London

London is 6 hours behind Hanoi right now: London is on BST (UTC+1) and Hanoi on ICT (UTC+7). That changes on Sun, Oct 25, when clocks go back in London: then London is 7 hours behind Hanoi.

Time difference between Hanoi and London over the next 12 months
From	Difference	Why
Now	London 6 hours behind	—
Sun, Oct 25	London 7 hours behind	Clocks go back in London
Sun, Mar 28, 2027	London 6 hours behind	Clocks go forward in London

Hanoi is on Indochina Time. London is on Greenwich Mean Time.

Frequently Asked Questions: Hanoi & London Scheduling

What is the time difference between Hanoi and London?: London is 6 hours behind Hanoi right now: London is on BST (UTC+1) and Hanoi on ICT (UTC+7). That changes on Sun, Oct 25, when clocks go back in London: then London is 7 hours behind Hanoi.
What is the best time to schedule a meeting between Hanoi and London?: 3:00 PM to 5:00 PM in Hanoi (9:00 AM to 11:00 AM in London). That's when both cities are inside working hours, 9 AM to 5 PM, giving 2 hours of overlap today.
Does Hanoi observe daylight saving time?: No. Hanoi stays on ICT (UTC+7) all year, so its clocks don't change.
Does London observe daylight saving time?: Yes. London is on BST (UTC+1) now, and its clocks go back 1 hour on Sun, Oct 25, to GMT (UTC+0).
What time is it in London when it's 9 AM in Hanoi?: 3:00 AM in London, on the same day.

Or see every city pair, or plan with more places in the meeting planner.