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Chatham Islands to London
Time Converter

Convert Chatham Islands, New Zealand to London, United Kingdom. Compare dates, seasonal differences and meeting hours.

THE QUICK ANSWER

Chatham Islands is 11h 45m, 12h 45m, or 13h 45m ahead of London in 2026, depending on the date.

9 AM Chatham Islands = 7:15 PM London Tue, 10 Nov at the destination

Selected date: November 11, 2026.

TIME & DATE
NZFROMUTC+13:45

New Zealand · +1345

Wed, 11 Nov
GBTOUTC

United Kingdom · GMT

7:15PM
Tue, 10 Nov-1 day
London is 13h 45m behind Chatham Islands.-1 day
Find your moment
Working hoursOutside hours
Chatham IslandsYour reference
LondonConverted time
Tap an hour to explore · November 11, 2026Dates follow Chatham Islands
Add to calendar
THE TIME DIFFERENCE13h 45mbehind

London compared with Chatham Islands.

SHARED WORKING HOURS0h2026-11-11

Adjust your working hours or choose another date.

THROUGH THE SEASONS3different offsets

Clock changes affect your time difference.

WORKING HOURS & MEETINGS

Best meeting times: Chatham Islands and London

No shared working hours on this date

Set each person’s local working hours.

Chatham Islands
to
London
to

Local working days, overnight shifts and the entire meeting duration are checked.

Closest alternatives60 MIN

¹ Sum of meeting minutes outside both people’s selected hours. Alternatives minimize the worst individual conflict first.

THE QUICK REFERENCE

Chatham Islands to London conversion table

November 11, 2026 · Date changes are marked.

CSV
View the full 24-hour table
Chatham IslandsLondon
12:00 AM10:15 AM -1 day
1:00 AM11:15 AM -1 day
2:00 AM12:15 PM -1 day
3:00 AM1:15 PM -1 day
4:00 AM2:15 PM -1 day
5:00 AM3:15 PM -1 day
6:00 AM4:15 PM -1 day
7:00 AM5:15 PM -1 day
8:00 AM6:15 PM -1 day
9:00 AM7:15 PM -1 day
10:00 AM8:15 PM -1 day
11:00 AM9:15 PM -1 day
Chatham IslandsLondon
12:00 PM10:15 PM -1 day
1:00 PM11:15 PM -1 day
2:00 PM12:15 AM
3:00 PM1:15 AM
4:00 PM2:15 AM
5:00 PM3:15 AM
6:00 PM4:15 AM
7:00 PM5:15 AM
8:00 PM6:15 AM
9:00 PM7:15 AM
10:00 PM8:15 AM
11:00 PM9:15 AM

Starting with the London working day

These examples start on 2026-11-11 in London.

09:00 London22:45 →Chatham Islands · 2026-11-11
17:00 London06:45 →Chatham Islands · 2026-11-12
SAME TIME NEXT WEEK?

Check recurring meeting times

Check the next 12 weeks for clock changes and working-hours conflicts.

Check my schedule
ONE CLOCK TIME. THE WHOLE YEAR.

09:00 Chatham Islands to London throughout 2026

Keeping 09:00 on the Chatham Islands clock produces 3 different destination clock/date answers in 2026. The ranges below use Chatham Islands calendar dates, including transition days.

Year CSV
London21:15Previous day175 of 365 source dates
London19:15Previous day155 of 365 source dates
London20:15Previous day35 of 365 source dates
Dates in Chatham Islands · 2026London answerSource → destination offsetsExplore
Jan 1 – Mar 2988 dates19:15Previous dayUTC+13:45 → UTC
Mar 30 – Apr 46 dates20:15Previous dayUTC+13:45 → UTC+01:00
Apr 5 – Sep 26175 dates21:15Previous dayUTC+12:45 → UTC+01:00
Sep 27 – Oct 2529 dates20:15Previous dayUTC+13:45 → UTC+01:00
Oct 26 – Dec 3167 dates19:15Previous dayUTC+13:45 → 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 Chatham Islands time become a different date in London?

Your complete source day: 2026-11-11. Each range shows which destination date to use.

Chatham Islands · 2026-11-1100:00–13:45UTC+13:45
London · 2026-11-1010:15–24:00UTC Previous day
Chatham Islands · 2026-11-1113:45–24:00UTC+13:45
London · 2026-11-1100:00–10:15UTC 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

A year of time differences.

How London compares with Chatham Islands throughout 2026.

2026
JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC
−13h 45m
−12h 45m
−11h 45m
−12h 45m
−13h 45m

Both Chatham Islands and London change their clocks in 2026. The chart shows whether those changes alter the difference.

See exact change periods
From (UTC, inclusive)Until (UTC, exclusive)London vs Chatham Islands
1 Jan 2026, 00:00 UTC29 Mar 2026, 01:00 UTC13h 45m behind
29 Mar 2026, 01:00 UTC4 Apr 2026, 14:00 UTC12h 45m behind
4 Apr 2026, 14:00 UTC26 Sep 2026, 14:00 UTC11h 45m behind
26 Sep 2026, 14:00 UTC25 Oct 2026, 01:00 UTC12h 45m behind
25 Oct 2026, 01:00 UTC1 Jan 2027, 00:00 UTC13h 45m behind
CLOCK CHANGES

What changes at the next clock adjustment?

March 28, 2027Local transition date
  • London clocks go forward by 1h on March 28, 2027.

After this change, Chatham Islands is 12h 45m ahead of London.

Exact clock readings and UTC transition

2027-03-28T01:00:00.000Z.

London: 2027-03-28 00:59 UTC → 2027-03-28 02:00 UTC+01:00.

Readings are one real minute apart. Future rules may change.

Exact periods outside the most common difference in 2026

The most frequent difference has London 11h 45m behind relative to Chatham Islands. Exceptions:

From (UTC, inclusive)Until (UTC, exclusive)Compared with Chatham Islands
1 Jan 2026, 00:00 UTC29 Mar 2026, 01:00 UTC13h 45m behind
29 Mar 2026, 01:00 UTC4 Apr 2026, 14:00 UTC12h 45m behind
26 Sep 2026, 14:00 UTC25 Oct 2026, 01:00 UTC12h 45m behind
25 Oct 2026, 01:00 UTC1 Jan 2027, 00:00 UTC13h 45m behind
PLAN BEYOND A SINGLE DAY

Chatham Islands–London working hours through 2026

Every date calculated with your working windows. 261 selected Chatham Islands workdays; public holidays are not applied.

Daily CSV
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.

Explore seasonal meeting times and your weekly schedule

Chatham Islands: 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.

THE DETAILS THAT MATTER

Chatham Islands to London: useful answers

Does the Chatham Islands to London difference stay the same all year?

Chatham Islands is 11h 45m, 12h 45m, or 13h 45m ahead of London in 2026, depending on the date. Both Chatham Islands and London change their clocks in 2026. The chart shows whether those changes alter the difference.

Does the Chatham Islands–London 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 Chatham Islands on 2026-11-11 is 19:15 in London on 2026-11-10. Use the destination date when adding the meeting to a calendar.

Can Chatham Islands and London meet during working hours?

Your selected working windows have no shared time on 2026-11-11. 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

London to Chatham Islands Reverse the conversion direction.

Choose the question you need answered

Best meeting timesAnnual overlap, year-round starts and weekly schedule checks
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Calculated with IANA 2026e. Working hours are your preferences; public holidays and calendar availability are not included. Our methodology

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