CDT Caribbean to GMT Converter
The United Kingdom is on summer time: BST (UTC+1) until Sun, Oct 25.
Iceland and Ghana stay on GMT (UTC+0).
Quick answers
Selected conversion
8:00 am08:00 CDT (UTC-4), Oct 9, 2026 = 12:00 pm12:00 GMT (UTC+0), Oct 9, 2026
CDT is 4 hours behind GMT.
CDT and GMT examples
These examples always use CDT (UTC-4) and GMT (UTC+0). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
CDT is 4 hours behind GMT.
How the time difference changes
For most of the year, CDT Caribbean is 4 hours behind GMT. At other times of the year, CST Caribbean is 5 hours behind GMT.
For most of the year, working hours of 9:00 am to 5:00 pm in CDT Caribbean correspond to 1:00 pm to 9:00 pm in GMT. At other times of the year, working hours of 9:00 am to 5:00 pm in CST Caribbean correspond to 2:00 pm to 10:00 pm in GMT.For most of the year, working hours of 09:00 to 17:00 in CDT Caribbean correspond to 13:00 to 21:00 in GMT. At other times of the year, working hours of 09:00 to 17:00 in CST Caribbean correspond to 14:00 to 22:00 in GMT.
Compare CDT time with GMT time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Cuba Daylight Time is 4 hours behind Greenwich Mean Time.
8:00 am08:00 in CDT is 12:00 pm12:00 in GMT
CDT to GMT call time
Best time for a conference call or a meeting is between 9am-1pm09:00-13:00 in CDT which corresponds to 1pm-5pm13:00-17:00 in GMT
8:00 am08:00 Cuba Daylight Time (CDT). Offset UTC -4:00 hours
12:00 pm12:00 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
8:00 am08:00 CDT / 12:00 pm12:00 GMT
| CDT | GMT |
|---|---|
| 12:00am | 4:00am |
| 1:00am | 5:00am |
| 2:00am | 6:00am |
| 3:00am | 7:00am |
| 4:00am | 8:00am |
| 5:00am | 9:00am |
| 6:00am | 10:00am |
| 7:00am | 11:00am |
| 8:00am | 12:00pm |
| 9:00am | 1:00pm |
| 10:00am | 2:00pm |
| 11:00am | 3:00pm |
| 12:00pm | 4:00pm |
| 1:00pm | 5:00pm |
| 2:00pm | 6:00pm |
| 3:00pm | 7:00pm |
| 4:00pm | 8:00pm |
| 5:00pm | 9:00pm |
| 6:00pm | 10:00pm |
| 7:00pm | 11:00pm |
| 8:00pm | 12:00am |
| 9:00pm | 1:00am |
| 10:00pm | 2:00am |
| 11:00pm | 3:00am |
| 00:00 | 04:00 |
| 01:00 | 05:00 |
| 02:00 | 06:00 |
| 03:00 | 07:00 |
| 04:00 | 08:00 |
| 05:00 | 09:00 |
| 06:00 | 10:00 |
| 07:00 | 11:00 |
| 08:00 | 12:00 |
| 09:00 | 13:00 |
| 10:00 | 14:00 |
| 11:00 | 15:00 |
| 12:00 | 16:00 |
| 13:00 | 17:00 |
| 14:00 | 18:00 |
| 15:00 | 19:00 |
| 16:00 | 20:00 |
| 17:00 | 21:00 |
| 18:00 | 22:00 |
| 19:00 | 23:00 |
| 20:00 | 00:00 |
| 21:00 | 01:00 |
| 22:00 | 02:00 |
| 23:00 | 03:00 |
Cuba Daylight Time
Offset: CDT is 4 hours behind Greenwich Mean Time (GMT) and is used in Caribbean
Countries using this time zone: Cuba
Principal Cities: The largest city in the CDT time zone is Havana in Cuba, with about 2.164 million people. Other major cities in this time zone include Santiago de Cuba, Camaguey, Holguin, Guantanamo.
Daylight Saving: Cuba Daylight Time (CDT) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Cuba Standard Time (CST).
Start: Cuba Daylight Time (CDT) started on Sunday, March 8, 2026 at 12:00 am00:00 local time and clocks were set one hour forward to Sunday, March 8, 2026, 1:00 am01:00. Daylight saving starts annually on the second Sunday of March.
End: Cuba Daylight Time (CDT) ends on Sunday, November 1, 2026 at 1:00 am01:00 local time and clocks are set one hour back to Sunday, November 1, 2026, 12:00 am00:00 local standard time instead. Daylight saving ends annually on the first Sunday of November.
CDT representations, usage and related time zones
- -04 - basic short
- -0400 - basic
- -04:00 - extended
- -0400 - sign character (-) followed by a four digit time providing hours (04) and minutes (00) of the offset. Indicates an offset of four hours to the west of the zero meridian.
- Quebec - Military abbreviation for CDT
- Q - short form of 'Quebec'
- America/Havana
- Cuba
- Central Daylight Time - UTC -5
- Cuba Daylight Time - UTC -4
- AST - Atlantic Standard Time
- EDT - Eastern Daylight Time
- AMT - Amazon Time
- BOT - Bolivia Time
- CDT - Cuba Daylight Time
- CLT - Chile Standard Time
- FKT - Falkland Island Time
- GYT - Guyana Time
- HLV - Hora Legal de Venezuela
- PYT - Paraguay Time
- Q - Quebec Time Zone
- VET - Venezuelan Standard Time
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, 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 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 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