TIME ZONE CONVERTER
London to Chatham Islands
Time Converter
Convert London, United Kingdom to Chatham Islands, New Zealand. Compare dates, seasonal differences and meeting hours.
London is 11h 45m, 12h 45m, or 13h 45m behind Chatham Islands in 2026, depending on the date.
9 AM London = 10:45 PM Chatham Islands
Selected date: November 10, 2026.
THE QUICK REFERENCE
CSVLondon to Chatham Islands conversion table
November 10, 2026 · Date changes are marked.
View the full 24-hour table
| London | Chatham Islands |
|---|---|
| 12:00 AM | 1:45 PM |
| 1:00 AM | 2:45 PM |
| 2:00 AM | 3:45 PM |
| 3:00 AM | 4:45 PM |
| 4:00 AM | 5:45 PM |
| 5:00 AM | 6:45 PM |
| 6:00 AM | 7:45 PM |
| 7:00 AM | 8:45 PM |
| 8:00 AM | 9:45 PM |
| 9:00 AM | 10:45 PM |
| 10:00 AM | 11:45 PM |
| 11:00 AM | 12:45 AM +1 day |
| London | Chatham Islands |
|---|---|
| 12:00 PM | 1:45 AM +1 day |
| 1:00 PM | 2:45 AM +1 day |
| 2:00 PM | 3:45 AM +1 day |
| 3:00 PM | 4:45 AM +1 day |
| 4:00 PM | 5:45 AM +1 day |
| 5:00 PM | 6:45 AM +1 day |
| 6:00 PM | 7:45 AM +1 day |
| 7:00 PM | 8:45 AM +1 day |
| 8:00 PM | 9:45 AM +1 day |
| 9:00 PM | 10:45 AM +1 day |
| 10:00 PM | 11:45 AM +1 day |
| 11:00 PM | 12:45 PM +1 day |
Starting with the Chatham Islands working day
These examples start on 2026-11-10 in Chatham Islands.
09:00 Chatham Islands19:15 →London · 2026-11-09
17:00 Chatham Islands03:15 →London · 2026-11-10
ONE CLOCK TIME. THE WHOLE YEAR.
Year CSV09:00 London to Chatham Islands throughout 2026
Keeping 09:00 on the London clock produces 3 different destination clock/date answers in 2026. The ranges below use London calendar dates, including transition days.
| Dates in London · 2026 | Chatham Islands answer | Source → destination offsets | Explore |
|---|---|---|---|
| Jan 1 – Mar 2887 dates | 22:45Same date | UTC → UTC+13:45 | |
| Mar 29 – Apr 47 dates | 21:45Same date | UTC+01:00 → UTC+13:45 | |
| Apr 5 – Sep 26175 dates | 20:45Same date | UTC+01:00 → UTC+12:45 | |
| Sep 27 – Oct 2428 dates | 21:45Same date | UTC+01:00 → UTC+13:45 | |
| Oct 25 – Dec 3168 dates | 22:45Same date | UTC → UTC+13:45 |
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 London time become a different date in Chatham Islands?
Your complete source day: 2026-11-10. Each range shows which destination date to use.
London · 2026-11-1000:00–10:15UTC
Chatham Islands · 2026-11-1013:45–24:00UTC+13:45 Same date
London · 2026-11-1010:15–24:00UTC
Chatham Islands · 2026-11-1100:00–13:45UTC+13:45 Next day
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 Chatham Islands compares with London throughout 2026.
JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC
+13h 45m
+12h 45m
+11h 45m
+12h 45m
+13h 45m
Both London and Chatham Islands change their clocks in 2026. The chart shows whether those changes alter the difference.
See exact change periods
| From (UTC, inclusive) | Until (UTC, exclusive) | Chatham Islands vs London |
|---|---|---|
| 1 Jan 2026, 00:00 UTC | 29 Mar 2026, 01:00 UTC | 13h 45m ahead |
| 29 Mar 2026, 01:00 UTC | 4 Apr 2026, 14:00 UTC | 12h 45m ahead |
| 4 Apr 2026, 14:00 UTC | 26 Sep 2026, 14:00 UTC | 11h 45m ahead |
| 26 Sep 2026, 14:00 UTC | 25 Oct 2026, 01:00 UTC | 12h 45m ahead |
| 25 Oct 2026, 01:00 UTC | 1 Jan 2027, 00:00 UTC | 13h 45m ahead |
CLOCK CHANGES
What changes at the next clock adjustment?
Exact periods outside the most common difference in 2026
The most frequent difference has Chatham Islands 11h 45m ahead relative to London. Exceptions:
| From (UTC, inclusive) | Until (UTC, exclusive) | Compared with London |
|---|---|---|
| 1 Jan 2026, 00:00 UTC | 29 Mar 2026, 01:00 UTC | 13h 45m ahead |
| 29 Mar 2026, 01:00 UTC | 4 Apr 2026, 14:00 UTC | 12h 45m ahead |
| 26 Sep 2026, 14:00 UTC | 25 Oct 2026, 01:00 UTC | 12h 45m ahead |
| 25 Oct 2026, 01:00 UTC | 1 Jan 2027, 00:00 UTC | 13h 45m ahead |
PLAN BEYOND A SINGLE DAY
Daily CSVLondon–Chatham Islands working hours through 2026
Every date calculated with your working windows. 261 selected London workdays; public holidays are not applied.
Least shared time0h
Most common0h
Most shared time0h
Days without a 60-min slot261 / 261
One fixed start time does not fit every working day.
Your working windows never overlap on the selected host workdays this year. Adjust working days, hours or duration above, or use different seasonal meeting times.
London: 09:00–17:00, Mon, Tue, Wed, Thu, Fri. Chatham Islands: 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.
THE DETAILS THAT MATTER
London to Chatham Islands: useful answers
Does the London to Chatham Islands difference stay the same all year?
London is 11h 45m, 12h 45m, or 13h 45m behind Chatham Islands in 2026, depending on the date. Both London and Chatham Islands change their clocks in 2026. The chart shows whether those changes alter the difference.
Does the London–Chatham Islands time difference change in 2026?
The published rules produce 5 periods with 3 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 London on 2026-11-10 is 22:45 in Chatham Islands on 2026-11-10. This selected time stays on the same date in both places. Other times can cross midnight.
Can London and Chatham Islands meet during working hours?
Your selected working windows have no shared time on 2026-11-10. The planner shows alternatives and how many minutes fall outside each person's working hours. Try another date or adjust the windows.
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