Offset
The time difference between Greenwich Mean Time and Cuba Standard Time is 5 hours.
Greenwich Mean Time (BST) is ahead of Cuba Standard Time (CDT).
BST: UTC+1
CDT: UTC-4
Both zones are currently observing daylight saving time.
When to schedule
Business-hours overlap: 2 PM–5 PM in Greenwich Mean Time (9 AM–12 PM in Cuba Standard Time).
Both teams are in working hours during this window on weekdays.
Suggested time: 3:00 PM Greenwich Mean Time (10:00 AM Cuba Standard Time).
This window may shift by an hour during daylight saving time.
Public holidays in 2026
National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.
United Kingdom
- Good FridayFri, Apr 3
- Early May Bank HolidayMon, May 4
- Spring Bank HolidayMon, May 25
- Christmas DayFri, Dec 25
- St. Stephen's DayMon, Dec 28
Cuba
- Triumph of the RevolutionThu, Jan 1
- Victory of Fidel CastroFri, Jan 2
- Good FridayFri, Apr 3
- Labour DayFri, May 1
- Day before the Commemoration of the Assault of the Moncada garrisonSat, Jul 25
- Commemoration of the Assault of the Moncada garrisonSun, Jul 26
- Day after the Commemoration of the Assault of the Moncada garrisonMon, Jul 27
- Independence DaySat, Oct 10
- Christmas DayFri, Dec 25
About these zones
Greenwich Mean Time is also known as GMT, or BST. To call United Kingdom, dial +44.
Cuba Standard Time is also known as CST, or CDT. To call Cuba, dial +53.
Cuba Standard Time is approximately 4,650 miles west of Greenwich Mean Time.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| GMT | CST-CUBA | Day |
|---|---|---|
| 12:00 am | 7:00 pm | -1 day |
| 1:00 am | 8:00 pm | -1 day |
| 2:00 am | 9:00 pm | -1 day |
| 3:00 am | 10:00 pm | -1 day |
| 4:00 am | 11:00 pm | -1 day |
| 5:00 am | 12:00 am | Same day |
| 6:00 am | 1:00 am | Same day |
| 7:00 am | 2:00 am | Same day |
| 8:00 am | 3:00 am | Same day |
| 9:00 am | 4:00 am | Same day |
| 10:00 am | 5:00 am | Same day |
| 11:00 am | 6:00 am | Same day |
| 12:00 pm | 7:00 am | Same day |
| 1:00 pm | 8:00 am | Same day |
| 2:00 pm | 9:00 am | Same day |
| 3:00 pm | 10:00 am | Same day |
| 4:00 pm | 11:00 am | Same day |
| 5:00 pm | 12:00 pm | Same day |
| 6:00 pm | 1:00 pm | Same day |
| 7:00 pm | 2:00 pm | Same day |
| 8:00 pm | 3:00 pm | Same day |
| 9:00 pm | 4:00 pm | Same day |
| 10:00 pm | 5:00 pm | Same day |
| 11:00 pm | 6:00 pm | Same day |
Daylight saving time
Both zones observe daylight saving time, but they transition on different dates.
Greenwich Mean Time: next transition on Sunday, October 25, 2026.
Cuba Standard Time: next transition on Sunday, November 1, 2026.
For approximately 7 days between transitions, the offset between Greenwich Mean Time and Cuba Standard Time differs from its typical value. Recurring meetings during this window will shift by one hour.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 4:47 AM
- Sunset
- 9:13 PM
- Day length
- 16h 25m
- Sunrise
- 6:44 AM
- Sunset
- 8:14 PM
- Day length
- 13h 30m
Daylight overlap: 9h 28m — 11:44 AM–9:13 PM in Greenwich Mean Time (6:44 AM–4:13 PM in Cuba Standard Time). Both locations are in daylight during this window.
Cities in these zones
Cities in Greenwich Mean Time
Cities in Cuba Standard Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Greenwich Mean Time
- LCY
- LGW
- LHR
- LTN
- STN
- BHX
- EMA
- GLA
- PIK
- LBA
Airports in Cuba Standard Time
- HAV
Related conversions
Common conversions
- What is 9:00 am GMT in CST-CUBA?
- 9:00 am GMT is 4:00 am CST-CUBA.
- What is 12:00 pm GMT in CST-CUBA?
- 12:00 pm GMT is 7:00 am CST-CUBA.
- What is 12:30 pm GMT in CST-CUBA?
- 12:30 pm GMT is 7:30 am CST-CUBA.
- What is 2:00 pm GMT in CST-CUBA?
- 2:00 pm GMT is 9:00 am CST-CUBA.
- What is 5:00 pm GMT in CST-CUBA?
- 5:00 pm GMT is 12:00 pm CST-CUBA.
- What is 11:30 pm GMT in CST-CUBA?
- 11:30 pm GMT is 6:30 pm CST-CUBA.