TIME ZONE CONVERTER
Hanoi to London
Time Converter
Convert Hanoi, Vietnam to London, United Kingdom. Compare dates, seasonal differences and meeting hours.
Hanoi is 6h or 7h ahead of London in 2026, depending on the date.
9 AM Hanoi = 2 AM London
Selected date: November 4, 2026.
THE QUICK REFERENCE
CSVHanoi to London conversion table
November 4, 2026 · Date changes are marked.
View the full 24-hour table
| Hanoi | London |
|---|---|
| 12:00 AM | 5:00 PM -1 day |
| 1:00 AM | 6:00 PM -1 day |
| 2:00 AM | 7:00 PM -1 day |
| 3:00 AM | 8:00 PM -1 day |
| 4:00 AM | 9:00 PM -1 day |
| 5:00 AM | 10:00 PM -1 day |
| 6:00 AM | 11:00 PM -1 day |
| 7:00 AM | 12:00 AM |
| 8:00 AM | 1:00 AM |
| 9:00 AM | 2:00 AM |
| 10:00 AM | 3:00 AM |
| 11:00 AM | 4:00 AM |
| Hanoi | London |
|---|---|
| 12:00 PM | 5:00 AM |
| 1:00 PM | 6:00 AM |
| 2:00 PM | 7:00 AM |
| 3:00 PM | 8:00 AM |
| 4:00 PM | 9:00 AM |
| 5:00 PM | 10:00 AM |
| 6:00 PM | 11:00 AM |
| 7:00 PM | 12:00 PM |
| 8:00 PM | 1:00 PM |
| 9:00 PM | 2:00 PM |
| 10:00 PM | 3:00 PM |
| 11:00 PM | 4:00 PM |
Starting with the London working day
These examples start on 2026-11-04 in London.
09:00 London16:00 →Hanoi · 2026-11-04
17:00 London00:00 →Hanoi · 2026-11-05
ONE CLOCK TIME. THE WHOLE YEAR.
Year CSV09:00 Hanoi to London throughout 2026
Keeping 09:00 on the Hanoi clock produces 2 different destination clock/date answers in 2026. The ranges below use Hanoi calendar dates, including transition days.
| Dates in Hanoi · 2026 | London answer | Source → destination offsets | Explore |
|---|---|---|---|
| Jan 1 – Mar 2887 dates | 02:00Same date | UTC+07:00 → UTC | |
| Mar 29 – Oct 24210 dates | 03:00Same date | UTC+07:00 → UTC+01:00 | |
| Oct 25 – Dec 3168 dates | 02:00Same date | UTC+07:00 → UTC |
Every calendar date is included, not just workdays. Date ranges include both endpoints. Based on IANA 2026e; future rules may change.
DON’T LOSE A DAY
When does Hanoi time become a different date in London?
Your complete source day: 2026-11-04. Each range shows which destination date to use.
Hanoi · 2026-11-0400:00–07:00UTC+07:00
London · 2026-11-0317:00–24:00UTC Previous day
Hanoi · 2026-11-0407:00–24:00UTC+07:00
London · 2026-11-0400:00–17:00UTC Same date
Range starts are included; ends are excluded. 24:00 means midnight at the end of that date. Repeated hours appear separately with their UTC offsets. The strip is proportional to elapsed time.
THE BIGGER PICTURE
2026A year of time differences.
How London compares with Hanoi throughout 2026.
JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC
−7h
−6h
−7h
London changes its UTC offset in 2026. Hanoi keeps one UTC offset this year.
See exact change periods
| From (UTC, inclusive) | Until (UTC, exclusive) | London vs Hanoi |
|---|---|---|
| 1 Jan 2026, 00:00 UTC | 29 Mar 2026, 01:00 UTC | 7h behind |
| 29 Mar 2026, 01:00 UTC | 25 Oct 2026, 01:00 UTC | 6h behind |
| 25 Oct 2026, 01:00 UTC | 1 Jan 2027, 00:00 UTC | 7h behind |
CLOCK CHANGES
What changes at the next clock adjustment?
Exact periods outside the most common difference in 2026
The most frequent difference has London 6h behind relative to Hanoi. Exceptions:
| From (UTC, inclusive) | Until (UTC, exclusive) | Compared with Hanoi |
|---|---|---|
| 1 Jan 2026, 00:00 UTC | 29 Mar 2026, 01:00 UTC | 7h behind |
| 25 Oct 2026, 01:00 UTC | 1 Jan 2027, 00:00 UTC | 7h behind |
PLAN BEYOND A SINGLE DAY
Daily CSVHanoi–London working hours through 2026
Every date calculated with your working windows. 261 selected Hanoi workdays; public holidays are not applied.
Least shared time1h
Most common2h
Most shared time2h
Days without a 60-min slot0 / 261
A start time that survives the whole year.
Start a 60-minute meeting in Hanoi 16:00.
These starts fit both working windows on every selected Hanoi workday in 2026, using a 15-minute start grid. The end of each range is the last valid start.
Hanoi: 09:00–17:00, Mon, Tue, Wed, Thu, Fri. London: 09:00–17:00, Mon, Tue, Wed, Thu, Fri.
Calculation details and repeated hours
Overnight shifts belong to their start weekday. Host workday means the source calendar date. Repeated local times use the first occurrence.
TWO PLACES. ONE CONNECTION.
≈ 9,235 km apartAcross the map. Across the clock.
THE DETAILS THAT MATTER
Hanoi to London: useful answers
Why is the Hanoi to London difference sometimes 6 hours and sometimes 7 hours?
Hanoi is 6h or 7h ahead of London in 2026, depending on the date. London changes its UTC offset in 2026. Hanoi keeps one UTC offset this year.
Does the Hanoi–London time difference change in 2026?
The published rules produce 3 periods with 2 different offsets in 2026. See the annual chart for the exact boundaries of each period.
Does this conversion change the calendar date?
09:00 in Hanoi on 2026-11-04 is 02:00 in London on 2026-11-04. This selected time stays on the same date in both places. Other times can cross midnight.
Can Hanoi and London meet during working hours?
Your selected working windows share 1h on 2026-11-04. The planner above checks the whole meeting duration and shows suitable start times. Edit the windows to match your team.
Related time-zone meanings and conversions
Choose the question you need answered
Calculated with IANA 2026e. Working hours are your preferences; public holidays and calendar availability are not included. Our methodology