IANA tz database · zone identifier

Asia/Muscat

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

UTC+04:00Abbreviation +04No daylight saving
Time in Asia/Muscat☾ Night
02:59:36
Thursday, October 15, 2026
Offset
UTC+04:00
Abbreviation
+04
DST
No DST

Current offset

UTC+04:00

same year-round

Abbreviation

+04

tzdb uses numeric abbreviations here

DST behaviour

None

one offset all year

Country

🇴🇲 Oman

ISO 3166: OM · view country page →

Using this identifier

The string to put in your code.

Asia/Muscat 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 +04 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: 'Asia/Muscat',
dateStyle: 'full', timeStyle: 'long'
}).format(new Date());

Offset & DST behaviour

One offset,
106 years.

Asia/Muscat has kept UTC+04:00 year-round since 31 December 1919 — 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

+03:54:20UTC+04:00 · UNCHANGED 31 December 1919 NOW

Keeping this offset since

31 December 1919

Next transition

None scheduled

no DST rules exist for this zone

Safe to assume

Local = UTC + 4h, always

…but store the identifier anyway

Technical record

The database entry, in full.

source: IANA tz database · release 2026d

IdentifierAsia/Muscat
ISO country codeOM🇴🇲 Oman
Reference coordinates23.60°N, 58.58°Etz database reference point
Standard offsetUTC+04:00abbreviation +04
Daylight offset—no daylight saving time
tzdb release2026ddata current as of this IANA release

Where it applies

All of Oman, one clock.

Looking for travel-friendly info? See Muscat or Gulf Standard Time.

🇴🇲
Oman

4.8M people, one time zone. The whole country resolves to Asia/Muscat.

Country page →
🇴🇲 Muscat
02:59
02:59:36 · +04
pop. 1.4MGST

Related identifiers

Nearby in the database.

Same zone group · Gulf Standard Time

other identifiers keeping GST

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 Asia/Muscat?
Asia/Muscat is UTC+04:00, year-round. The offset never changes because the zone does not observe daylight saving time.
Does Asia/Muscat observe daylight saving time?
No. Asia/Muscat stays on UTC+04:00 all year, as it has since 31 December 1919.
Which country uses Asia/Muscat?
Oman. The identifier covers the whole country.
Is Asia/Muscat the same as GST?
Asia/Muscat is one of the IANA zones that keeps Gulf Standard Time (GST). Use Asia/Muscat in software — GST 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/Asia/Muscat
{
"data": {
"iana": "Asia/Muscat",
"observes_dst": false,
"country": { "code": "OM", "name": "Oman" },
"current": {
"utc_offset": "+04:00",
"abbreviation": "+04",
…
},
…
}
}