GMT to NZDT to London Time Converter
The United Kingdom is on summer time: BST (UTC+1) until Sun, Oct 25.
Iceland and Ghana stay on GMT (UTC+0).
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Quick answers
Selected conversion
12:00 pm12:00 GMT (UTC+0), Oct 18, 2026 = 1:00 am01:00 NZDT (UTC+13), Oct 19, 2026 = 1:00 pm13:00 BST (UTC+1), Oct 18, 2026
GMT is 13 hours behind NZDT. GMT is 1 hour behind London.
How the time difference changes
GMT to NZDT
Depending on seasonal clock changes, GMT is 12 hours behind NZST or GMT is 13 hours behind NZDT.
Depending on seasonal clock changes, working hours of 9:00 am to 6:00 pm in GMT correspond to 9:00 pm to 6:00 am (next day) in NZST or working hours of 9:00 am to 6:00 pm in GMT correspond to 10:00 pm to 7:00 am (next day) in NZDT.Depending on seasonal clock changes, working hours of 09:00 to 18:00 in GMT correspond to 21:00 to 06:00 (next day) in NZST or working hours of 09:00 to 18:00 in GMT correspond to 22:00 to 07:00 (next day) in NZDT.
GMT to London
For most of the year, GMT is 1 hour behind London. From Oct 25, 2026 to Mar 28, 2027, GMT and London have the same time.
For most of the year, working hours of 9:00 am to 6:00 pm in GMT correspond to 10:00 am to 7:00 pm in London. At other times of the year, working hours of 9:00 am to 6:00 pm in GMT correspond to 9:00 am to 6:00 pm in London.For most of the year, working hours of 09:00 to 18:00 in GMT correspond to 10:00 to 19:00 in London. At other times of the year, working hours of 09:00 to 18:00 in GMT correspond to 09:00 to 18:00 in London.
Compare GMT time with NZDT and London time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Greenwich Mean Time is 13 hours behind New Zealand Daylight Time. Greenwich Mean Time is 1 hour behind BST (British Summer Time).
12:00 pm12:00 in GMT is 1:00 am01:00 in NZDT and is 1:00 pm13:00 in London, United Kingdom
GMT to NZDT call time
Best time for a conference call or a meeting is between 6:30pm-7:30pm18:30-19:30 in GMT which corresponds to 7:30am-8:30am07:30-08:30 in NZDT (next day). Their 9am–6pm09:00–18:00 working hours do not overlap; this is a suggested compromise.
GMT to London call time
Best time for a conference call or a meeting is between 9am-5pm09:00-17:00 in GMT which corresponds to 10am-6pm10:00-18:00 in London
12:00 pm12:00 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
1:00 am01:00 New Zealand Daylight Time (NZDT). Offset UTC +13:00 hours
1:00 pm13:00 BST (British Summer Time) (London, United Kingdom). Offset UTC +1:00 hour
12:00 pm12:00 GMT / 1:00 am01:00 NZDT / 1:00 pm13:00 London, United Kingdom
Choose an hour to update the converter. Day labels such as “next day” or “+1” are relative to the selected date in the first column. Use Up and Down arrow keys, Home or End to move between hours, then Enter or Space to select.
| GMT | NZDT | London, United Kingdom |
|---|---|---|
| 1:00pm | 1:00am | |
| 2:00pm | 2:00am | |
| 3:00pm | 3:00am | |
| 4:00pm | 4:00am | |
| 5:00pm | 5:00am | |
| 6:00pm | 6:00am | |
| 7:00pm | 7:00am | |
| 8:00pm | 8:00am | |
| 9:00pm | 9:00am | |
| 10:00pm | 10:00am | |
| 11:00pm | 11:00am | |
| 12:00am next day | 12:00pm | |
| 1:00am next day | 1:00pm | |
| 2:00am next day | 2:00pm | |
| 3:00am next day | 3:00pm | |
| 4:00am next day | 4:00pm | |
| 5:00am next day | 5:00pm | |
| 6:00am next day | 6:00pm | |
| 7:00am next day | 7:00pm | |
| 8:00am next day | 8:00pm | |
| 9:00am next day | 9:00pm | |
| 10:00am next day | 10:00pm | |
| 11:00am next day | 11:00pm | |
| 12:00pm next day | 12:00am next day | |
| 13:00 | 01:00 | |
| 14:00 | 02:00 | |
| 15:00 | 03:00 | |
| 16:00 | 04:00 | |
| 17:00 | 05:00 | |
| 18:00 | 06:00 | |
| 19:00 | 07:00 | |
| 20:00 | 08:00 | |
| 21:00 | 09:00 | |
| 22:00 | 10:00 | |
| 23:00 | 11:00 | |
| 00:00 next day | 12:00 | |
| 01:00 next day | 13:00 | |
| 02:00 next day | 14:00 | |
| 03:00 next day | 15:00 | |
| 04:00 next day | 16:00 | |
| 05:00 next day | 17:00 | |
| 06:00 next day | 18:00 | |
| 07:00 next day | 19:00 | |
| 08:00 next day | 20:00 | |
| 09:00 next day | 21:00 | |
| 10:00 next day | 22:00 | |
| 11:00 next day | 23:00 | |
| 12:00 next day | 00:00 next day |
Greenwich Mean Time
Offset: GMT is the same as Greenwich Mean Time (GMT).
Countries using this time zone: Antarctica, Burkina Faso, Gambia, Ghana, Greenland, Guernsey, Guinea, Guinea-Bissau, Iceland, Ireland, Isle of Man, Ivory Coast, Jersey, Liberia, Mali, Mauritania, Morocco, Saint Helena, São Tomé and Príncipe, Senegal, Sierra Leone, Togo, United Kingdom, Western Sahara
Principal Cities: The largest city in the GMT time zone is London in the United Kingdom, with about 8.962 million people. Other major cities in this time zone include Abidjan, Bamako, Casablanca, Dakar.
Greenwich Mean Time (GMT) originally referred to the mean solar time at the Royal Observatory in Greenwich, London. It is now often used to refer to Coordinated Universal Time (UTC) when this is viewed as a time zone, and in casual use the two are the same. In the military, GMT is known as Zulu time. Greenwich Mean Time was the same as Universal Time (UT), a standard astronomical concept used in many technical fields, until the introduction of UTC in 1972.
Today the lighter areas are on UTC+1 (British Summer Time, Irish Standard Time).
GMT representations, usage and related time zones
- Z - is the zone designator for the zero UTC/GMT offset, also known as 'Zulu' time
- +00 - basic short
- +0000 - basic
- +00:00 - extended
- +0000 - sign character (+) followed by a four digit time providing hours (00) and minutes (00) of the offset. Indicates the zero UTC/GMT offset.
- Zulu - Military abbreviation for GMT
- Z - short form of 'Zulu'
- Africa/Abidjan
- Africa/Accra
- Africa/Bamako
- Africa/Banjul
- Africa/Bissau
- Africa/Conakry
- Africa/Dakar
- Africa/Freetown
- Africa/Lome
- Africa/Monrovia
- Africa/Nouakchott
- Africa/Ouagadougou
- Africa/Sao_Tome
- Africa/Timbuktu
- America/Danmarkshavn
- Atlantic/Reykjavik
- Atlantic/St_Helena
- Eire
- Etc/GMT
- Etc/GMT+0
- Etc/GMT-0
- Etc/GMT0
- Etc/Greenwich
- Europe/Belfast
- Europe/Dublin
- Europe/Guernsey
- Europe/Isle_of_Man
- Europe/Jersey
- Europe/London
- GB
- GB-Eire
- GMT
- GMT+0
- GMT-0
- GMT0
- Greenwich
- Iceland
- EGST - Eastern Greenland Summer Time
- GMT - Greenwich Mean Time
- WET - Western European Time
- AZOST - Azores Summer Time
- UTC - Coordinated Universal Time
- WT - Western Sahara Standard Time
- Z - Zulu Time Zone
New Zealand Daylight Time
Offset: NZDT is 13 hours ahead of Greenwich Mean Time (GMT).
Countries using this time zone: Antarctica, New Zealand
Principal Cities: The largest city in the NZDT time zone is Auckland in New Zealand, with about 1.547 million people. Other major cities in this time zone include Christchurch, Wellington, Hamilton, Tauranga.
Today all shaded areas are on NZDT.
Daylight Saving: New Zealand Daylight Time (NZDT) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe New Zealand Standard Time (NZST).
Start: New Zealand Daylight Time (NZDT) started on Sunday, September 27, 2026 at 2:00 am02:00 local time and clocks were set one hour forward to Sunday, September 27, 2026, 3:00 am03:00. Daylight saving starts annually on the last Sunday of September.
End: New Zealand Daylight Time (NZDT) ends on Sunday, April 4, 2027 at 3:00 am03:00 local time and clocks are set one hour back to Sunday, April 4, 2027, 2:00 am02:00 local standard time instead. Daylight saving ends annually on the first Sunday of April.
See New Zealand daylight saving time and upcoming clock changes worldwide.
NZDT representations, usage and related time zones
- +13 - basic short
- +1300 - basic
- +13:00 - extended
- +1300 - sign character (+) followed by a four digit time providing hours (13) and minutes (00) of the offset. Indicates an offset of thirteen hours to the east of the zero meridian.
- Antarctica/McMurdo
- Antarctica/South_Pole
- NZ
- Pacific/Auckland
- FJST - Fiji Summer Time
- NZDT - New Zealand Daylight Time
- PHOT - Phoenix Island Time
- TKT - Tokelau Time
- TOT - Tonga Time
- WST - West Samoa Time
- WSST - West Samoa Standard Time
London Time Zone and Facts
Time Zone
GMT – Greenwich Mean Time, UTC+0 (standard time)