IANA tz database · zone identifier

Atlantic/Azores

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

UTC+00:00Abbreviation +00Observes daylight saving
Time in Atlantic/Azores☀ Daylight
14:08:04
Thursday, October 15, 2026
Offset
UTC+00:00
Abbreviation
+00
DST
Active

Current offset

UTC+00:00

standard UTC-01:00 · daylight UTC+00:00

Abbreviation

+00

tzdb uses numeric abbreviations here

DST behaviour

Observes

changes clocks twice a year

Country

🇵🇹 Portugal

ISO 3166: PT · view country page →

Using this identifier

The string to put in your code.

Atlantic/Azores 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 +00 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/Azores',
dateStyle: 'full', timeStyle: 'long'
}).format(new Date());

Offset & DST behaviour

Two offsets,
every year.

Atlantic/Azores alternates between -01 (UTC-01:00) and AZOST (UTC+00:00). Right now it is on +00; clocks fall back on 25 October 2026.

The year at a glance

-01 · UTC-01:00AZOST · UTC+00:00-01 · UTC-01:0029 Mar · +1h25 Oct · −1h Jan 2026 Dec

Technical record

The database entry, in full.

source: IANA tz database · release 2026e

IdentifierAtlantic/Azores
ISO country codePT🇵🇹 Portugal
Reference coordinates37.73°N, 25.67°Wtz database reference point
Standard offsetUTC-01:00abbreviation -01
Daylight offsetUTC+00:00abbreviation AZOST
tzdb release2026edata current as of this IANA release

Where it applies

One of Portugal's 3 zones.

🇵🇹
Portugal

10M people, 3 time zones — this identifier covers one of them.

Country page →

Related identifiers

Nearby in the database.

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/Azores?
Atlantic/Azores is currently UTC+00:00 (+00). It alternates between UTC-01:00 in winter and UTC+00:00 in summer.
Does Atlantic/Azores observe daylight saving time?
Yes. Clocks fall back at the next transition on 25 October 2026, as they do twice every year.
Which country uses Atlantic/Azores?
Portugal. It is one of 3 IANA zones covering the country.
Is Atlantic/Azores the same as AZOT?
Atlantic/Azores is one of the IANA zones that keeps Azores Standard Time (AZOT). Use Atlantic/Azores in software — AZOT 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/Atlantic/Azores
{
"data": {
"iana": "Atlantic/Azores",
"observes_dst": true,
"country": { "code": "PT", "name": "Portugal" },
"current": {
"utc_offset": "+00:00",
"abbreviation": "+00",
…
},
…
}
}