Time zone · Asia

IRST

Iran Standard Time

Iran Standard Time follows a fixed UTC+03:30 offset year-round, so you never need to adjust for daylight saving shifts in calls or deployments with Tehran.

UTC+03:30 standard1 IANA zone16 cities
Current time in IRST☾ Night
23:33:07

Friday, June 5, 2026

☾ NIGHT 04:4812:0219:17
Standard
+0330 · +3:30
IANA zones
1

Current offset

UTC+03:30

Standard · +0330

Daylight saving

Not observed

Year-round standard time

IANA zones

1

None observe daylight saving

DST offset

—

No summer variant

About IRST

A fixed, year-round offset.

Iran Standard Time follows a fixed UTC+03:30 offset year-round, so you never need to adjust for daylight saving shifts in calls or deployments with Tehran.

IANA zones · the technical identifiers

The zone that resolve to IRST.

For software, always store the IANA identifier — never the abbreviation alone. The database keeps these zones distinct because their rules can, and historically did, diverge.

IANA zonePrimary cityDST
Asia/TehranTehran— None

Cities currently on IRST

The same hour, city by city.

16 cities · all UTC+03:30

Tehran
23:33
23:33:08 · +0330
IRST year-round
Mashhad
23:33
23:33:08 · +0330
IRST year-round
Isfahan
23:33
23:33:08 · +0330
IRST year-round
Karaj
23:33
23:33:08 · +0330
IRST year-round
Shiraz
23:33
23:33:08 · +0330
IRST year-round
Tabriz
23:33
23:33:08 · +0330
IRST year-round
Qom
23:33
23:33:08 · +0330
IRST year-round
Ahvaz
23:33
23:33:09 · +0330
IRST year-round
Kermanshah
23:33
23:33:09 · +0330
IRST year-round
Orūmīyeh
23:33
23:33:09 · +0330
IRST year-round
Rasht
23:33
23:33:09 · +0330
IRST year-round
Zahedan
23:33
23:33:09 · +0330
IRST year-round
Hamadān
23:33
23:33:09 · +0330
IRST year-round
Kerman
23:33
23:33:09 · +0330
IRST year-round
Arāk
23:33
23:33:09 · +0330
IRST year-round
Āzādshahr
23:33
23:33:09 · +0330
IRST year-round

Where IRST is used

One country.

Iran
IRST · UTC+03:30

Frequently asked questions

Common questions about IRST, daylight saving, and how to handle it in software. Can't find what you need? Email [email protected].

Does Iran observe daylight saving time?
No. Iran Standard Time stays on UTC+03:30 all year, so there are no spring-forward or fall-back changes to track.
Why is the offset UTC+03:30 instead of a round hour?
The half-hour offset reflects Iran’s geographic position and historical choice, placing its clock midway between two full-hour zones.
How many time zones does Iran have?
Just one. The entire country uses Asia/Tehran under the IRST code.
Is the offset ever different in summer?
No. Since 2022 the offset has remained a steady UTC+03:30 with no seasonal change.
What’s the time difference with London in winter?
When London is on GMT (UTC+0), Tehran is 3 hours and 30 minutes ahead.
What’s the time difference with New York?
During U.S. Eastern Standard Time (UTC-5), Tehran is 8 hours and 30 minutes ahead.
Do any nearby countries share this offset?
No neighboring country uses UTC+03:30, making Iran’s offset unique in the region.
When was the last change to Iran’s time zone?
The current UTC+03:30 offset has been in effect since September 21, 2022.

Free · Developer API

Time, as JSON.

Every IANA time zone with live offsets, DST status, and the countries and cities that use them — clean, dependable JSON. Sign up free and get an API key in seconds.

GET /v1/timezones Live

countries, cities, convert, DST transitions coming next.

Get your free API key →
// France's time zones, right now
GET /v1/timezones?country=fr
{
"data": [
{
"iana": "Europe/Paris",
"display_name": "Paris",
"current": {
"utc_offset": "+02:00",
"abbreviation": "CEST",
"is_dst": true
}
}
]
}