GMT to CHADT Converter
The United Kingdom is on summer time: BST (UTC+1) until Sun, Oct 25.
Iceland and Ghana stay on GMT (UTC+0).
Start by searching for a time zone, city, or town.
Add one or more places to compare local times, adjust the date, and share the result.
Quick answers
Selected conversion
12:00 pm12:00 GMT (UTC+0), Oct 13, 2026 = 1:45 am01:45 CHADT (UTC+13:45), Oct 14, 2026
GMT is 13 hours and 45 minutes behind CHADT.
GMT and CHADT examples
These examples always use GMT (UTC+0) and CHADT (UTC+13:45). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
GMT is 13 hours and 45 minutes behind CHADT.
How the time difference changes
Depending on seasonal clock changes, GMT is 12 hours and 45 minutes behind CHAST or GMT is 13 hours and 45 minutes behind CHADT.
Depending on seasonal clock changes, working hours of 9:00 am to 5:00 pm in GMT correspond to 9:45 pm to 5:45 am (next day) in CHAST or working hours of 9:00 am to 5:00 pm in GMT correspond to 10:45 pm to 6:45 am (next day) in CHADT.Depending on seasonal clock changes, working hours of 09:00 to 17:00 in GMT correspond to 21:45 to 05:45 (next day) in CHAST or working hours of 09:00 to 17:00 in GMT correspond to 22:45 to 06:45 (next day) in CHADT.
Compare GMT time with CHADT 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 and 45 minutes behind Chatham Island Daylight Time.
12:00 pm12:00 in GMT is 1:45 am01:45 in CHADT
GMT to CHADT call time
Best time for a conference call or a meeting is between 5:45pm-6:45pm17:45-18:45 in GMT which corresponds to 7:30am-8:30am07:30-08:30 in CHADT (next day). Their 9am–5pm09:00–17:00 working hours do not overlap; this is a suggested compromise.
12:00 pm12:00 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
1:45 am01:45 Chatham Island Daylight Time (CHADT). Offset UTC +13:45 hours
12:00 pm12:00 GMT / 1:45 am01:45 CHADT
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 | CHADT |
|---|---|
| 1:45pm | |
| 2:45pm | |
| 3:45pm | |
| 4:45pm | |
| 5:45pm | |
| 6:45pm | |
| 7:45pm | |
| 8:45pm | |
| 9:45pm | |
| 10:45pm | |
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| 12:45am next day | |
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| 13:45 | |
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| 19:45 | |
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| 00:45 next day | |
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Greenwich Mean Time
Offset: GMT is the same as Greenwich Mean Time (GMT).
Countries using this time zone: Burkina Faso, Côte d'Ivoire, Britain (UK), Guernsey, Ghana, Greenland, Gambia, Guinea, Guinea-Bissau, Ireland, Isle of Man, Iceland, Jersey, Liberia, Mali, Mauritania, St Helena, Sierra Leone, Senegal, Sao Tome & Principe, Togo
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, Dakar, Kumasi.
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
Chatham Island Daylight Time
Offset: CHADT is 13 hours and 45 minutes ahead of Greenwich Mean Time (GMT).
Countries using this time zone: New Zealand
Principal Cities: The largest city in the CHADT time zone is Waitangi in New Zealand, with about 140 people.
Today all shaded areas are on CHADT.
Daylight Saving: Chatham Island Daylight Time (CHADT) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Chatham Island Standard Time (CHAST).
Start: Chatham Island Daylight Time (CHADT) started on Sunday, September 27, 2026 at 2:45 am02:45 local time and clocks were set one hour forward to Sunday, September 27, 2026, 3:45 am03:45. Daylight saving starts annually on the last Sunday of September.
End: Chatham Island Daylight Time (CHADT) ends on Sunday, April 4, 2027 at 3:45 am03:45 local time and clocks are set one hour back to Sunday, April 4, 2027, 2:45 am02:45 local standard time instead. Daylight saving ends annually on the first Sunday of April.
CHADT representations, usage and related time zones
- +1345 - basic
- +13:45 - extended
- +1345 - sign character (+) followed by a four digit time providing hours (13) and minutes (45) of the offset. Indicates an offset of thirteen hours and forty-five minutes to the east of the zero meridian.