IANA tz database · zone identifier

Atlantic/Reykjavik

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

UTC+00:00Abbreviation GMTNo DST — never observed
Time in Atlantic/Reykjavik☾ Night
23:00:02
Wednesday, July 15, 2026
Offset
UTC+00:00
Abbreviation
GMT
DST
No DST

Current offset

UTC+00:00

same year-round

Abbreviation

GMT

used year-round

DST behaviour

Never

has never observed daylight saving

Country

🇮🇸 Iceland

ISO 3166: IS · view country page →

Using this identifier

The string to put in your code.

Atlantic/Reykjavik 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 GMT or +00:00 — abbreviations are ambiguous and fixed offsets can't follow rule changes.

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

Offset & DST behaviour

One offset,
58 years.

Atlantic/Reykjavik has kept UTC+00:00 year-round since 7 April 1968 — 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

−01:27:24UTC+00:00 · UNCHANGED 7 April 1968 NOW

Keeping this offset since

7 April 1968

Next transition

None scheduled

no DST rules exist for this zone

Safe to assume

Local = UTC + 0h, always

…but store the identifier anyway

Technical record

The database entry, in full.

source: IANA tz database

IdentifierAtlantic/Reykjavik
ISO country codeIS🇮🇸 Iceland
Reference coordinates64.15°N, 21.85°Wtz database reference point
Standard offsetUTC+00:00abbreviation GMT
Daylight offset—daylight saving has never been observed

Where it applies

All of Iceland, one clock.

Looking for travel-friendly info? See Reykjavik or Greenwich Mean Time.

🇮🇸
Iceland

364K people, one time zone. The whole country resolves to Atlantic/Reykjavik.

Country page →
🇮🇸 Reykjavik
23:00
23:00:02 · GMT
pop. 139KGMT

Related identifiers

Nearby in the database.

Same zone group · Greenwich Mean Time

other identifiers keeping GMT

Same offset · UTC+00:00

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 Atlantic/Reykjavik?
Atlantic/Reykjavik is UTC+00:00, year-round. The offset never changes because the zone does not observe daylight saving time.
Does Atlantic/Reykjavik observe daylight saving time?
No. Atlantic/Reykjavik has never observed DST — it has kept UTC+00:00 continuously since 7 April 1968.
Which country uses Atlantic/Reykjavik?
Iceland. The identifier covers the whole country.
Is Atlantic/Reykjavik the same as GMT?
Atlantic/Reykjavik is one of the IANA zones that keeps Greenwich Mean Time (GMT). Use Atlantic/Reykjavik in software — GMT 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=Atlantic/Reykjavik
{
"iana": "Atlantic/Reykjavik",
"utc_offset": "+00:00",
"abbreviation": "GMT",
"observes_dst": false,
"country": "IS"
}