IANA tz database · zone identifier

America/Kentucky/Monticello

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

UTC-04:00Abbreviation EDTObserves daylight saving
Time in America/Kentucky/Monticello☾ Night
19:01:23
Wednesday, October 14, 2026
Offset
UTC-04:00
Abbreviation
EDT
DST
Active

Current offset

UTC-04:00

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

Abbreviation

EDT

the daylight-saving form

DST behaviour

Observes

changes clocks twice a year

Country

🇺🇸 United States

ISO 3166: US · view country page →

Using this identifier

The string to put in your code.

America/Kentucky/Monticello 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 EDT 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/Kentucky/Monticello',
dateStyle: 'full', timeStyle: 'long'
}).format(new Date());

Offset & DST behaviour

Two offsets,
every year.

America/Kentucky/Monticello alternates between EST (UTC-05:00) and EDT (UTC-04:00). Right now it is on EDT; clocks fall back on 1 November 2026.

The year at a glance

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

Technical record

The database entry, in full.

source: IANA tz database · release 2026d

IdentifierAmerica/Kentucky/Monticello
ISO country codeUS🇺🇸 United States
Reference coordinates36.83°N, 84.85°Wtz database reference point
Standard offsetUTC-05:00abbreviation EST
Daylight offsetUTC-04:00abbreviation EDT
tzdb release2026ddata current as of this IANA release

Where it applies

One of United States's 29 zones.

🇺🇸
United States

340M people, 29 time zones — this identifier covers one of them.

Country page →

Related identifiers

Nearby in the database.

Same zone group · Eastern Standard Time

other identifiers keeping EST

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/Kentucky/Monticello?
America/Kentucky/Monticello is currently UTC-04:00 (EDT). It alternates between UTC-05:00 in winter and UTC-04:00 in summer.
Does America/Kentucky/Monticello 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/Kentucky/Monticello?
United States. It is one of 29 IANA zones covering the country.
Is America/Kentucky/Monticello the same as EST?
America/Kentucky/Monticello is one of the IANA zones that keeps Eastern Standard Time (EST). Use America/Kentucky/Monticello in software — EST is a human-friendly label, not a valid identifier.

Free · Developer API

This zone, as JSON.

Its live offset, abbreviation, DST status and next clock change, plus its coordinates and country, from one endpoint.

GET /v1/timezones Live

Also in the API: time zones by coordinates, conversions that flag daylight saving gaps, and abbreviations decoded.

Get your free API key → All endpoints Plans and pricing

Moving off WorldTimeAPI? Our drop-in replacement needs no key.

// this identifier, resolved live
GET /v1/timezones/America/Kentucky/Monticello
{
"data": {
"iana": "America/Kentucky/Monticello",
"observes_dst": true,
"country": { "code": "US", "name": "United States" },
"current": {
"utc_offset": "-04:00",
"abbreviation": "EDT",
…
},
…
}
}