IANA tz database · zone identifier

America/Havana

The IANA tz database identifier for Cuba Standard Time in Cuba. Store this string — not the abbreviation, not the offset — and your timestamps stay correct forever.

UTC-04:00Abbreviation CDTObserves daylight saving
Time in America/Havana☾ Night
18:59:56
Wednesday, July 15, 2026
Offset
UTC-04:00
Abbreviation
CDT
DST
Active

Current offset

UTC-04:00

standard UTC-05:00 · daylight UTC-04:00

Abbreviation

CDT

the daylight-saving form

DST behaviour

Observes

changes clocks twice a year

Country

🇨🇺 Cuba

ISO 3166: CU · view country page →

Using this identifier

The string to put in your code.

America/Havana is the identifier to use in code and config for this region. Every modern language, database, and OS resolves it through the same tz database, so the examples here behave identically everywhere.

Avoid storing CDT or -04:00 — abbreviations are ambiguous and fixed offsets can't follow rule changes.

// format a date in this zone
new Intl.DateTimeFormat('en-US', {
timeZone: 'America/Havana',
dateStyle: 'full', timeStyle: 'long'
}).format(new Date());

Offset & DST behaviour

Two offsets,
every year.

America/Havana alternates between CST (UTC-05:00) and CDT (UTC-04:00). Right now it is on CDT; clocks fall back on 1 November 2026.

The year at a glance

CST · UTC-05:00CDT · UTC-04:00CST · UTC-05:008 Mar · +1h1 Nov · −1h Jan 2026 Dec

Technical record

The database entry, in full.

source: IANA tz database

IdentifierAmerica/Havana
ISO country codeCU🇨🇺 Cuba
Reference coordinates23.13°N, 82.37°Wtz database reference point
Standard offsetUTC-05:00abbreviation CST
Daylight offsetUTC-04:00abbreviation CDT

Where it applies

All of Cuba, one clock.

Looking for travel-friendly info? See Havana or Cuba Standard Time.

🇨🇺
Cuba

11M people, one time zone. The whole country resolves to America/Havana.

Country page →
🇨🇺 Havana
18:59
18:59:56 · CDT
pop. 2.5MCST
🇨🇺 Santiago de Cuba
18:59
18:59:56 · CDT
pop. 506KCST

Related identifiers

Nearby in the database.

Same offset · UTC-04:00

other zones keeping this offset right now

Frequently asked questions

Answers specific to this identifier — generated from the database record. Can't find what you need? Email [email protected].

What UTC offset is America/Havana?
America/Havana is currently UTC-04:00 (CDT). It alternates between UTC-05:00 in winter and UTC-04:00 in summer.
Does America/Havana observe daylight saving time?
Yes. Clocks fall back at the next transition on 1 November 2026, as they do twice every year.
Which country uses America/Havana?
Cuba. The identifier covers the whole country.
Is America/Havana the same as CST?
America/Havana is one of the IANA zones that keeps Cuba Standard Time (CST). Use America/Havana in software — CST is a human-friendly label, not a valid identifier.

Free · Developer API

This zone, as JSON.

Everything on this page — offset, abbreviation, DST rules, coordinates — from one endpoint, always current with the latest tzdb release.

GET /v1/timezones Live

countries, cities, convert, DST transitions coming next.

Get your free API key →
// this identifier, resolved live
GET /v1/timezones?iana=America/Havana
{
"iana": "America/Havana",
"utc_offset": "-04:00",
"abbreviation": "CDT",
"observes_dst": true,
"country": "CU"
}