GMT to NZDT Time Converter
NZDT is 12 hours ahead of GMT. The UK and Ireland are currently on BST (UTC+1:00), and NZDT is UTC+13:00.
Best Time to Call Between GMT and NZDT
Standard 9-to-5 hours in these two zones never overlap, so someone has to take the call outside their working day. The most workable window is 7:00 AM to 10:00 AM GMT, which is 7:00 PM to 10:00 PM NZDT.
both at work GMT only NZDT only neither — hours along the strip are GMT.
Common Times Converted
GMT on the left, NZDT on the right.
GMT to NZDT: Full 24-Hour Conversion Table
Shaded rows are working hours; the darker shade marks the hours when both zones are at work.
| GMT | NZDT | Working hours |
|---|---|---|
| 12:00 AM | 12:00 PM | NZDT only |
| 1:00 AM | 1:00 PM | NZDT only |
| 2:00 AM | 2:00 PM | NZDT only |
| 3:00 AM | 3:00 PM | NZDT only |
| 4:00 AM | 4:00 PM | NZDT only |
| 5:00 AM | 5:00 PM | — |
| 6:00 AM | 6:00 PM | — |
| 7:00 AM | 7:00 PM | — |
| 8:00 AM | 8:00 PM | — |
| 9:00 AM | 9:00 PM | GMT only |
| 10:00 AM | 10:00 PM | GMT only |
| 11:00 AM | 11:00 PM | GMT only |
| 12:00 PM | 12:00 AM next day | GMT only |
| 1:00 PM | 1:00 AM next day | GMT only |
| 2:00 PM | 2:00 AM next day | GMT only |
| 3:00 PM | 3:00 AM next day | GMT only |
| 4:00 PM | 4:00 AM next day | GMT only |
| 5:00 PM | 5:00 AM next day | — |
| 6:00 PM | 6:00 AM next day | — |
| 7:00 PM | 7:00 AM next day | — |
| 8:00 PM | 8:00 AM next day | — |
| 9:00 PM | 9:00 AM next day | NZDT only |
| 10:00 PM | 10:00 AM next day | NZDT only |
| 11:00 PM | 11:00 AM next day | NZDT only |
What GMT and NZDT Actually Are
GMT — Greenwich Mean Time
The UK and Ireland in winter, plus Iceland, Portugal and much of West Africa. Standing at UTC as written, and the region does change its clocks, so its live offset moves by an hour twice a year. The next change is on Sunday, October 25, 2026, to GMT. Often used loosely as a synonym for UTC. They differ by less than a second, so for scheduling they are interchangeable.
Britain ran an experiment from 1968 to 1971 on permanent UTC+1, abandoning GMT entirely. It was scrapped after complaints about dark winter mornings in Scotland.
NZDT — New Zealand Daylight Time
Auckland, Wellington, Christchurch in the southern summer. Standing at UTC+13:00 as written, and the region does change its clocks, so its live offset moves by an hour twice a year. The next change is on Sunday, April 4, 2027, to NZST.
New Zealand daylight time runs late September to early April, and the Chatham Islands keep their own clock 45 minutes ahead of the mainland throughout.
What This Means in Practice
The date changes mid-working-day
For 5 of the eight hours in a normal GMT working day, the equivalent NZDT time falls on a different calendar date. Anything scheduled in that stretch needs the date checked as well as the time, or a Tuesday call quietly becomes a Wednesday one at the other end.
Both sides change clocks, on different dates
Both regions observe daylight saving but do not switch on the same day, so for a week or two each spring and fall the gap between them is an hour different from the rest of the year. Those short windows are where recurring invitations quietly break.
Nearly opposite sides of the clock
At 12 hours apart, one side's morning is the other side's night. Handing work over at the end of a shift usually beats trying to get both parties in the same call.
Major Cities in Each Zone
Cities on GMT
Cities on NZDT
Frequently Asked Questions
What is the time difference between GMT and NZDT?
NZDT is 12 hours ahead of GMT. That is the live figure. Taken strictly as written, the gap between GMT and NZDT is 13 hours — the two differ because at least one of these regions is currently on daylight saving.
What is 9:00 AM GMT in NZDT?
9:00 AM GMT is 9:00 PM NZDT.
What are the best hours to schedule a call between GMT and NZDT?
Standard business hours in these two zones do not overlap at all, so one side has to work outside the 9-to-5. The most workable window is 7:00 AM to 10:00 AM GMT, which is 7:00 PM to 10:00 PM NZDT.
Does the difference between GMT and NZDT change during the year?
Yes. Both regions observe daylight saving, and they do not switch on the same dates, so the gap shifts by an hour at least twice a year. The next clock change is on Sunday, October 25, 2026.
Does GMT always mean Greenwich Mean Time?
Often used loosely as a synonym for UTC. They differ by less than a second, so for scheduling they are interchangeable.