Does it account for Daylight Saving Time?

Yes, our converter uses the IANA timezone database, which includes all current DST rules for every timezone in the world.

UTC (Coordinated Universal Time) is the primary time standard by which the world regulates clocks. All timezones are defined as offsets from UTC.

Can I compare multiple timezones at once?

Yes, you can add multiple cities or timezones and see the equivalent times side by side.

How many timezones are there in the world?

There are 38 distinct UTC offsets in use, ranging from UTC-12 to UTC+14. This includes half-hour (UTC+5:30 India, UTC+9:30 Australia) and 45-minute offsets (UTC+5:45 Nepal, UTC+8:45 Australia).

What is the International Date Line?

The International Date Line (IDL) runs roughly along the 180° meridian in the Pacific Ocean. When you cross it westward, you gain a day; crossing eastward, you lose a day.

Why do some timezones have 30 or 45 minute offsets?

Countries chose offsets that best matched their solar noon. India uses UTC+5:30 and Nepal uses UTC+5:45 because standard hourly offsets didn't align well with their geography.

Which country has the most timezones?

France has the most (12 timezones) due to overseas territories. Russia spans 11 timezones. The US has 6 (including Hawaii and Alaska).

Anchorage to IRST

+11h 30m

Anchorage

AKDTSOURCE

USA · UTC-08:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

IRST

UTC+03:30

HH11

MM30

23:30 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Anchorage

IRST

12:00 AM

11:30 AM

2:00 AM

1:30 PM

4:00 AM

3:30 PM

6:00 AM

5:30 PM

8:00 AM

7:30 PM

10:00 AM

9:30 PM

12:00 PM

11:30 PM

2:00 PM

1:30 AM+1

4:00 PM

3:30 AM+1

6:00 PM

5:30 AM+1

8:00 PM

7:30 AM+1

10:00 PM

9:30 AM+1

Green rows indicate typical business hours (9 AM - 5 PM)

AKDT and IRST on the World Map

The map below highlights the AKDT (Alaska Standard Time) and IRST (Iran Standard Time) timezone regions across the globe.

AKDT Zone

→

IRST Zone

Explore all world timezones interactively →

AKST – Alaska Standard Time

UTC-09:00

Alaska Standard Time (AKST) is the time zone for the state of Alaska, 9 hours behind UTC.

Countries in AKST

United States (Alaska)

Major Cities in AKST

AnchorageFairbanksJuneauSitkaWasilla

Key Facts about AKST

•Alaska is the largest US state by area but has only about 730,000 residents.
•Anchorage is the most populous city in AKST with about 290,000 people.
•The Aleutian Islands use HAST instead of AKST.

Daylight Saving:Yes – switches to AKDT

Learn more about AKST on Wikipedia

IRST – Iran Standard Time

UTC+03:30

Iran Standard Time (IRST) is the time zone for Iran, 3 hours and 30 minutes ahead of UTC.

Countries in IRST

Iran

Major Cities in IRST

TehranIsfahanMashhadTabrizShirazKaraj

Key Facts about IRST

•IRST is one of only a few time zones with a 30-minute offset.
•Iran observes daylight saving time, switching to IRDT (UTC+04:30).
•Tehran has a metropolitan population of over 16 million.

Daylight Saving:Yes – switches to IRDT

Learn more about IRST on Wikipedia

About Anchorage

Wikipedia

Anchorage operates on Alaska Time (AKST/AKDT), UTC-9. As a global air cargo hub, Anchorage connects Asian and American markets via polar routes.

Population:287,000

Metro:398,000

Business Hours:8:00 AM - 5:00 PM AKST

Currency:USD ($)

Key Landmarks

Anchorage MuseumTony Knowles Coastal TrailFlattop MountainAlaska Wildlife Conservation CenterShip Creek

Did You Know?

Moose occasionally wander through the city streets.

Learn more about AKDT timezone →

Understanding the +11h 30m Gap: Anchorage vs IRST

Anchorage runs on Alaska Daylight Time (AKDT) at UTC-08:00, currently observing daylight saving time. IRST runs on Iran Standard Time (IRST) at UTC+03:30. That puts Anchorage 11 hours 30 minutes ahead of IRST — a difference of +11h 30m at the current offsets.

In practice, when it is 9:00 AM in Anchorage it is 8:30 PM in IRST. Midnight in Anchorage is 11:30 AM in IRST.Anchorage observes daylight saving time while IRST does not, so the gap narrows or widens by an hour part of the year.

Anchorage to IRST time conversion table

Anchorage (AKDT)	IRST (IRST)	Day
12:00 AM	11:30 AM	same day
6:00 AM	5:30 PM	same day
7:00 AM	6:30 PM	same day
8:00 AM	7:30 PM	same day
9:00 AM	8:30 PM	same day
12:00 PM	11:30 PM	same day
3:00 PM	2:30 AM	next day
5:00 PM	4:30 AM	next day
6:00 PM	5:30 AM	next day
9:00 PM	8:30 AM	next day

Why people convert Anchorage to IRST time

Scheduling a call from Anchorage to IRST: a 10:00 AM start in Anchorage lands at 9:30 PM in IRST, so you can confirm the slot without doing the arithmetic yourself.
Handling a +11h 30m gap: Anchorage and IRST have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in IRST is 8:30 PM in Anchorage.
Watching a live event or market open: Anchorage viewers need 8:30 PM in IRST to catch a 9:00 AM start there, and 12:30 PM if the event is anchored to Anchorage.

Always state the zone abbreviation, not just the hour. "3:00 PM AKDT" is unambiguous; "3 PM" across a +11h 30m gap is not.
With a +11h 30m gap there is no shared 9-to-5 window, so alternate the early start: one week Anchorage takes the early slot, the next week IRST does.
Anchorage: Clocks fall back on Sun, Nov 1, 2026. Re-check this page after that date because the offset changes and so does the +11h 30m gap.

About AKST (Alaska Standard Time)

Alaska Standard Time (AKST) is used in nearly all of Alaska. Due to Alaska's vast geographic size, the Aleutian Islands use Hawaii-Aleutian Standard Time instead. During summer months, Alaska switches to Alaska Daylight Time (AKDT, UTC-08:00).

About IRST (Iran Standard Time)

Iran Standard Time (IRST) is one of the few time zones with a 30-minute offset. Iran observes daylight saving time (IRDT, UTC+04:30) from late March to late September. Tehran, the capital, is one of the largest cities in the Middle East.

Best time to call between Anchorage and IRST

With a +11h 30m offset there is no overlap inside a normal 9 AM – 5 PM day. IRST opens at 9:00 AM IRST, which is 8:30 PM in Anchorage, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

Anchorage and IRST have no shared working hours because of the +11h 30m gap. Teams need to alternate early starts or rely on asynchronous handovers.

Anchorage is 11 hours 30 minutes ahead of IRST (AKDT UTC-08:00 → IRST UTC+03:30). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

Anchorage

☀ Currently in DST

Standard: UTC-09:00 · DST: UTC-08:00

Clocks fall back on Sun, Nov 1, 2026

IRST

Does not observe DST

Learn More About Time

Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:

⏳

History of Timekeeping

From sundials to atomic clocks - 5000 years of measuring time

🌍

How Time Zones Work

UTC, offsets, and why zones don't follow straight lines

☀️

Daylight Saving Time

DST dates, which countries observe it, and the ongoing debate

Frequently Asked Questions

What is the time difference between Anchorage and IRST?

Anchorage (AKDT, UTC-08:00) is 11 hours 30 minutes ahead of IRST (IRST, UTC+03:30). The gap is currently +11h 30m.

How do I convert Anchorage time to IRST time?

Add +11h 30m to Anchorage local time. For example, 9:00 AM in Anchorage is 8:30 PM in IRST.

What time is it in IRST right now?

IRST uses IRST at UTC+03:30. Use the live converter at the top of this page — it updates in real time and already accounts for the +11h 30m offset from Anchorage.

What is the best time to call IRST from Anchorage?

There is no shared working-hours window because of the +11h 30m gap. The closest option is 1:00 PM in Anchorage, which is 12:30 AM in IRST.

Which is ahead, Anchorage or IRST?

Anchorage is 11 hours 30 minutes ahead of IRST. When it is 12:00 PM in Anchorage it is 11:30 PM in IRST.

Do Anchorage and IRST use different time zones?

Anchorage (USA) uses AKDT at UTC-08:00, while IRST uses IRST at UTC+03:30. The IANA identifiers are America/Anchorage and Asia/Tehran.

Does daylight saving time affect the Anchorage–IRST difference?

Yes at the moment: Anchorage is on daylight saving time and IRST is not, so the +11h 30m gap shifts by an hour when exactly one of them changes clocks.