IANA tz database · zone identifier

Pacific/Chuuk

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

UTC+10:00Abbreviation +10No DST — never observed

Time in Pacific/Chuuk☀ Daylight

08:57:17

Thursday, July 16, 2026

Offset

UTC+10:00

Abbreviation

+10

DST

No DST

Current offset

UTC+10:00

same year-round

Abbreviation

+10

tzdb uses numeric abbreviations here

DST behaviour

Never

has never observed daylight saving

Country

🇫🇲 Micronesia

ISO 3166: FM · view country page →

Using this identifier

The string to put in your code.

Pacific/Chuuk 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 +10 or +10:00 — abbreviations are ambiguous and fixed offsets can't follow rule changes.

// format a date in this zone

new Intl.DateTimeFormat('en-US', {

timeZone: 'Pacific/Chuuk',

dateStyle: 'full', timeStyle: 'long'

}).format(new Date());

Offset & DST behaviour

One offset,
80 years.

Pacific/Chuuk has kept UTC+10:00 year-round since 1 August 1945 — no daylight saving and no offset changes on record since. It is among the most stable identifiers in the database.

Every offset this zone has kept

Keeping this offset since

1 August 1945

Next transition

None scheduled

no DST rules exist for this zone

Safe to assume

Local = UTC + 10h, always

…but store the identifier anyway

Technical record

The database entry, in full.

source: IANA tz database

IdentifierPacific/Chuuk

ISO country codeFM🇫🇲 Micronesia

Reference coordinates7.42°N, 151.78°Etz database reference point

Standard offsetUTC+10:00abbreviation +10

Daylight offset—daylight saving has never been observed

Where it applies

One of Micronesia's 3 zones.

🇫🇲

Micronesia

76K people, 3 time zones — this identifier covers one of them.

Country page →

Related identifiers

Nearby in the database.

Same offset · UTC+10:00

other zones keeping this offset right now

Asia/Ust-NeraRussia · Vladivostok Standard Time Asia/VladivostokRussia · Vladivostok Standard Time Australia/BrisbaneAustralia · Australian Eastern Standard Time Australia/HobartAustralia · Australian Eastern Standard Time Australia/LindemanAustralia · Australian Eastern Standard Time Australia/MelbourneAustralia · Australian Eastern Standard Time

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 Pacific/Chuuk?: Pacific/Chuuk is UTC+10:00, year-round. The offset never changes because the zone does not observe daylight saving time.
Does Pacific/Chuuk observe daylight saving time?: No. Pacific/Chuuk has never observed DST — it has kept UTC+10:00 continuously since 1 August 1945.
Which country uses Pacific/Chuuk?: Micronesia. It is one of 3 IANA zones covering the country.
Is Pacific/Chuuk the same as CHUUKT?: Pacific/Chuuk is one of the IANA zones that keeps Chuuk Time (CHUUKT). Use Pacific/Chuuk in software — CHUUKT 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=Pacific/Chuuk

{

"iana": "Pacific/Chuuk",

"utc_offset": "+10:00",

"abbreviation": "+10",

"observes_dst": false,

"country": "FM"

}