Time zone · Americas
CDT
Cuba Daylight Time
Cuba Daylight Time (CDT) is UTC-04:00, the clock all of Cuba uses from the second Sunday in March to the first Sunday in November.
Wednesday, October 14, 2026
Current offset
UTC-04:00
Daylight · CDT
Daylight saving
Active
Reverts 1 Nov 2026
IANA zones
1
1 observe DST, 0 don't
DST offset
—
No summer variant
About CDT
Standard time, with a summer shift.
Cuba Daylight Time (CDT) is UTC-04:00, the clock all of Cuba uses from the second Sunday in March to the first Sunday in November.
IANA zones · the technical identifiers
The zone that resolve to CDT.
For software, always store the IANA identifier — never the abbreviation alone. The database keeps these zones distinct because their rules can, and historically did, diverge.
Cities across CDT
Local time, city by city.
2 cities
Where CDT is used
One country.
Same offset · UTC-04:00
Other zones at UTC-04:00 right now.
These named zones share CDT's offset today. When daylight saving rules differ, they drift apart for part of the year.
Convert
CDT to the world's clocks.
Frequently asked questions
Common questions about CDT, daylight saving, and how to handle it in software. Can't find what you need? Email [email protected].
- When does Havana typically enter CDT each year?
- Havana switches to CDT on the second Sunday in March, moving clocks forward an hour to UTC-04:00, and stays there until the first Sunday in November.
- Does all of Cuba observe daylight saving?
- Yes. All of Cuba is on a single time zone, so Havana and Santiago de Cuba change their clocks together.
- Is CDT unique to Cuba?
- No—Central Daylight Time also exists in North America; always check the country context to avoid confusion between Cuban CDT and, say, U.S. Central Daylight Time.
- What happens when CDT ends in November?
- On the first Sunday in November, Havana clocks fall back from CDT (UTC-04:00) to Cuba Standard Time (UTC-05:00), gaining an hour and signaling shorter days ahead.
- Are there quirks about Cuban DST?
- Cuba has sometimes changed its clocks on unusual dates and has occasionally kept daylight saving time all winter, as in 2004–2006—making it one of the more unpredictable DST schedules in the Americas.
- How far in advance is the schedule known?
- Cuba has at times announced changes only weeks in advance, but since 2013 it has followed the same rule every year: forward on the second Sunday in March, back on the first Sunday in November.
- Why does Cuba use DST at all?
- Primarily to reduce electricity consumption—extending daylight hours means less need for artificial lighting during evening peak usage periods.
Source: IANA tzdb2026d · Reviewed
Free · Developer API
This time zone, as JSON.
Its defining offset, DST status and member counts, from one endpoint.
Also in the API: time zones by coordinates, conversions that flag daylight saving gaps, and abbreviations decoded.
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