When to phone Cuba (+53)
Cuba runs on CST — five hours behind GMT in winter, four hours in summer. Knowing the best time to call Cuba on +53 keeps you inside Havana office hours and clear of the extended midday break.
CST, at a glance.
See the live gap between a global reference city and Cuba's single CST zone — no calculator needed.
Cuba against the world's hubs.
Compare live Cuban time against New York, London and Dubai so your call lands inside Havana office hours.
Understanding the time difference between the United States and Cuba
Time zone differences across other major countries
Why timing matters for calls to Cuba.
Cuba's extended midday break clears desks for two or more hours — call before noon or after 3 PM to catch active lines.
The best windows to reach Cuba.
Four factors that decide when a Cuban prospect picks up — built around the CST midday break.
Cuba runs at -05:00
The zone is America/Havana. Every window on this page is worked out from that offset rather than a rule of thumb, so the times shown are the ones that actually apply to Cuba.
Clocks change here
Cuba observes daylight saving, shifting to -04:00 in its summer. A window that works in January moves by an hour later in the year, so re-check before scheduling a recurring call.
Shared hours with 3 of 5 markets
Callers in New York, Los Angeles, London share part of the working day with Cuba. The table above gives the exact intersection for each.
Where the gap is too wide
There is no 9-to-5 overlap with Mumbai, Sydney. Calling Cuba from those cities means someone is working outside normal hours — worth saying so when you book the call.
How to call Cuba using the +53 code.
Four simple steps for every call into Cuba — including the two-digit area codes.
Number anatomy
Dial exit code
Press + on mobile or 00 from most landlines. This opens an international line.
Enter +53
Cuba's international code. Every call to Cuba must start with +53.
Area prefix
Add the local area or mobile network code — always drop any leading zero used for domestic calls.
Full number
Dial the remaining subscriber digits. Your number is now correctly formatted for international routing.
Best time to call — every country.
Jump to any country's best-time-to-call guide. Search by name, ISO or dial prefix.
Reach Cuban customers in their window, on verified routes.
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When your working day overlaps Cuba
Callers in New York, Los Angeles and London share part of the working day with Cuba. There is no shared working window with Mumbai and Sydney.
| Calling from | Cuba is | Call at (your time) | Which is (their time) |
|---|---|---|---|
| New York | same time | 9:00 AM – 5:00 PM | 9:00 AM – 5:00 PM |
| Los Angeles | 3h ahead | 9:00 AM – 2:00 PM | 12:00 PM – 5:00 PM |
| London | 5h behind | 2:00 PM – 5:00 PM | 9:00 AM – 12:00 PM |
| Mumbai | 10h 30m behind | No shared working hours — you would need to call outside 9am-5pm | |
| Sydney | 16h behind | No shared working hours — you would need to call outside 9am-5pm | |
Windows are the intersection of a 9am-5pm working day in each place, using Cuba'sstandard-time offset of -05:00. Cuba observes daylight saving, so during its summer the offset moves to -04:00 and each window shifts by an hour.
FAQ
Calling Cuba, answered.
Time zone, daylight saving and dialling questions for Cuba (+53).