GMT to NZDT to London Time Converter
NZDT is not used on August 28, 2026
This converter uses NZST for New Zealand.
Quick answers
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 5:00 pm in GMT correspond to 9:00 pm to 5:00 am (next day) in NZST or working hours of 9:00 am to 5:00 pm in GMT correspond to 10:00 pm to 6:00 am (next day) in NZDT.
GMT to London
For most of the year, GMT is 1 hour behind London. During seasonal clock changes, GMT and London have the same time.
For most of the year, working hours of 9:00 am to 5:00 pm in GMT correspond to 10:00 am to 6:00 pm in London. During seasonal clock changes, working hours of 9:00 am to 5:00 pm in GMT correspond to 9:00 am to 5:00 pm 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 12 hours behind New Zealand Standard Time and 1 hour behind BST (British Summer Time)
5:00 am05:00 in GMT is 5:00 pm17:00 in NZST and is 6:00 am06:00 in London, United Kingdom
GMT to NZST call time
Best time for a conference call or a meeting is between 7am-8am in GMT which corresponds to 7pm-8pm in NZST
GMT to London call time
Best time for a conference call or a meeting is between 9am-4pm in GMT which corresponds to 10am-5pm in London
5:00 am05:00 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
5:00 pm17:00 New Zealand Standard Time (NZST). Offset UTC +12:00 hours
6:00 am06:00 BST (British Summer Time) (London, United Kingdom). Offset UTC +1:00 hour
5:00 am05:00 GMT / 5:00 pm17:00 NZST / 6:00 am06:00 London, United Kingdom
| GMT | NZST | London, United Kingdom |
|---|---|---|
| 12am (midnight) | 12pm (noon) | 1am |
| 1am | 1pm | 2am |
| 2am | 2pm | 3am |
| 3am | 3pm | 4am |
| 4am | 4pm | 5am |
| 5am | 5pm | 6am |
| 6am | 6pm | 7am |
| 7am | 7pm | 8am |
| 8am | 8pm | 9am |
| 9am | 9pm | 10am |
| 10am | 10pm | 11am |
| 11am | 11pm | 12pm (noon) |
| 12pm (noon) | 12am (midnight) | 1pm |
| 1pm | 1am | 2pm |
| 2pm | 2am | 3pm |
| 3pm | 3am | 4pm |
| 4pm | 4am | 5pm |
| 5pm | 5am | 6pm |
| 6pm | 6am | 7pm |
| 7pm | 7am | 8pm |
| 8pm | 8am | 9pm |
| 9pm | 9am | 10pm |
| 10pm | 10am | 11pm |
| 11pm | 11am | 12am (midnight) |
| 00:00 | 12:00 | 01:00 |
| 01:00 | 13:00 | 02:00 |
| 02:00 | 14:00 | 03:00 |
| 03:00 | 15:00 | 04:00 |
| 04:00 | 16:00 | 05:00 |
| 05:00 | 17:00 | 06:00 |
| 06:00 | 18:00 | 07:00 |
| 07:00 | 19:00 | 08:00 |
| 08:00 | 20:00 | 09:00 |
| 09:00 | 21:00 | 10:00 |
| 10:00 | 22:00 | 11:00 |
| 11:00 | 23:00 | 12:00 |
| 12:00 | 00:00 | 13:00 |
| 13:00 | 01:00 | 14:00 |
| 14:00 | 02:00 | 15:00 |
| 15:00 | 03:00 | 16:00 |
| 16:00 | 04:00 | 17:00 |
| 17:00 | 05:00 | 18:00 |
| 18:00 | 06:00 | 19:00 |
| 19:00 | 07:00 | 20:00 |
| 20:00 | 08:00 | 21:00 |
| 21:00 | 09:00 | 22:00 |
| 22:00 | 10:00 | 23:00 |
| 23:00 | 11:00 | 00:00 |
Greenwich Mean Time
Offset: GMT is 0 hours ahead Greenwich Mean Time (GMT) and is used in Europe
Countries using this time zone: Burkina Faso, Côte d'Ivoire, Ghana, Greenland, Gambia, Guinea, Guinea-Bissau, Iceland, Liberia, Mali, Mauritania, St Helena, Sierra Leone, Senegal, Sao Tome & Principe, Togo
Principal Cities: The largest city in the GMT time zone is Abidjan in Ivory Coast, with about 3.677 million people. Other major cities in this time zone include Dakar, Grand Dakar, Accra, Camayenne.
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 for the most parts it is the same. In military GMT is known as Zulu time.Greenwich Mean Time was the same as Universal Time (UT), until the introduction of UTC in 1972 a standard astronomical concept used in many technical fields.
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 - Universal Time Coordinated
- WT - Western Sahara Standard Time
- Z - Zulu Time Zone
New Zealand Daylight Time
Offset: NZDT is 13 hours ahead Greenwich Mean Time (GMT) and is used in Pacific
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 1.535 million people. Other major cities in this time zone include Wellington, Christchurch, Hamilton, Tauranga.
Daylight Saving: New Zealand Daylight Time (NZDT) is a daylight saving/summer time zone, but some places set clocks back one hour during winter and observe New Zealand Standard Time (NZST).
End: New Zealand Daylight Time (NZDT) ended on Sunday, April 5, 2026 at 3:00 am local time and clocks were set one hour back to Sunday, April 5, 2026, 2:00 am local standard time instead. Daylight saving ends annually on the first Sunday of April
Start: New Zealand Daylight Time (NZDT) starts on Sunday, September 27, 2026 at 2:00 am local time and clocks are set one hour forward to Sunday, September 27, 2026, 3:00 am. Daylight saving starts annually on the last Sunday of September
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 Information
Time Zone
GMT - Greenwich Mean Time
+0:00 hours during Greenwich Mean Time.
Sunday, March 29, 2026 at 1:00 am local time. DST starts annually on the last Sunday of March. Clocks are turned forward 1 hour to Sunday, March 29, 2026 at 2:00 am local daylight time instead. Also called Spring Forward or Summer Time.Sunday, October 25, 2026 at 2:00 am local time. DST ends annually on the last Sunday of October. Clocks are turned backward 1 hour to Sunday, October 25, 2026 at 1:00 am local standard time instead. Also called Fall Back or switch to Winter Time.