IANA tz database · zone identifier

Asia/Baku

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

UTC+04:00Abbreviation +04No DST — never observed

Time in Asia/Baku☾ Night

02:58:31

Thursday, July 16, 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

Never

has never observed daylight saving

Country

🇦🇿 Azerbaijan

ISO 3166: AZ · view country page →

Using this identifier

The string to put in your code.

Asia/Baku 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/Baku',

dateStyle: 'full', timeStyle: 'long'

}).format(new Date());

Offset & DST behaviour

One offset,
10 years.

Asia/Baku has kept UTC+04:00 year-round since 25 October 2015 — 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

25 October 2015

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

IdentifierAsia/Baku

ISO country codeAZ🇦🇿 Azerbaijan

Reference coordinates40.38°N, 49.85°Etz database reference point

Standard offsetUTC+04:00abbreviation +04

Daylight offset—daylight saving has never been observed

Where it applies

All of Azerbaijan, one clock.

Looking for travel-friendly info? See Baku or Azerbaijan Standard Time.

🇦🇿

Azerbaijan

10M people, one time zone. The whole country resolves to Asia/Baku.

Related identifiers

Nearby in the database.

Same offset · UTC+04:00

other zones keeping this offset right now

Asia/DubaiUnited Arab Emirates · Gulf Standard Time Asia/MuscatOman · Gulf Standard Time Asia/TbilisiGeorgia · Georgia Standard Time Asia/YerevanArmenia · Armenia Standard Time Europe/AstrakhanRussia · Astrakhan Time Europe/SamaraRussia · Samara 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 Asia/Baku?: Asia/Baku is UTC+04:00, year-round. The offset never changes because the zone does not observe daylight saving time.
Does Asia/Baku observe daylight saving time?: No. Asia/Baku has never observed DST — it has kept UTC+04:00 continuously since 25 October 2015.
Which country uses Asia/Baku?: Azerbaijan. The identifier covers the whole country.
Is Asia/Baku the same as AST?: Asia/Baku is one of the IANA zones that keeps Azerbaijan Standard Time (AST). Use Asia/Baku in software — AST 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=Asia/Baku

{

"iana": "Asia/Baku",

"utc_offset": "+04:00",

"abbreviation": "+04",

"observes_dst": false,

"country": "AZ"

}