IANA tz database · zone identifier

Pacific/Honolulu

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

UTC-10:00Abbreviation HSTNo daylight saving
Time in Pacific/Honolulu☾ Night
04:08:55
Thursday, October 15, 2026
Offset
UTC-10:00
Abbreviation
HST
DST
No DST

Current offset

UTC-10:00

same year-round

Abbreviation

HST

used year-round

DST behaviour

None

one offset all year

Country

🇺🇸 United States

ISO 3166: US · view country page →

Using this identifier

The string to put in your code.

Pacific/Honolulu 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 HST 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/Honolulu',
dateStyle: 'full', timeStyle: 'long'
}).format(new Date());

Offset & DST behaviour

One offset,
79 years.

Pacific/Honolulu has kept UTC-10:00 year-round since 8 June 1947 — 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

−10:31:26UTC-10:00 · UNCHANGED 8 June 1947 NOW

Keeping this offset since

8 June 1947

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 · release 2026e

IdentifierPacific/Honolulu
ISO country codeUS🇺🇸 United States
Reference coordinates21.31°N, 157.86°Wtz database reference point
Standard offsetUTC-10:00abbreviation HST
Daylight offset—no daylight saving time
tzdb release2026edata 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 · Hawaii-Aleutian Standard Time

other identifiers keeping HST

Same offset · UTC-10:00

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 Pacific/Honolulu?
Pacific/Honolulu is UTC-10:00, year-round. The offset never changes because the zone does not observe daylight saving time.
Does Pacific/Honolulu observe daylight saving time?
No. Pacific/Honolulu stays on UTC-10:00 all year, as it has since 8 June 1947.
Which country uses Pacific/Honolulu?
United States. It is one of 29 IANA zones covering the country.
Is Pacific/Honolulu the same as HST?
Pacific/Honolulu is one of the IANA zones that keeps Hawaii-Aleutian Standard Time (HST). Use Pacific/Honolulu in software — HST is a human-friendly label, not a valid identifier.

Free · Developer API

This zone, as JSON.

Its live offset, abbreviation and DST status, 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/Pacific/Honolulu
{
"data": {
"iana": "Pacific/Honolulu",
"observes_dst": false,
"country": { "code": "US", "name": "United States" },
"current": {
"utc_offset": "-10:00",
"abbreviation": "HST",
…
},
…
}
}