Does it handle Daylight Saving Time?

Yes, the tool automatically adjusts for Daylight Saving Time based on the specific date you select, ensuring accurate conversions year-round.

Can I add multiple cities?

Yes, you can add as many cities as you need to the dashboard to compare times across your entire global network simultaneously.

IRST to AKST

-12h 30m

IRST

IRSTSOURCE

UTC+03:30

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

AKST

UTC-08:00☀ DST active

HH11

MM30

(previous day)23:30 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

IRST

AKST

12:00 AM

12:30 PM-1

2:00 AM

2:30 PM-1

4:00 AM

4:30 PM-1

6:00 AM

6:30 PM-1

8:00 AM

8:30 PM-1

10:00 AM

10:30 PM-1

12:00 PM

12:30 AM

2:00 PM

2:30 AM

4:00 PM

4:30 AM

6:00 PM

6:30 AM

8:00 PM

8:30 AM

10:00 PM

10:30 AM

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

IRST and AKST on the World Map

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

IRST Zone

→

AKST Zone

Explore all world timezones interactively →

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

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

Comparing Time Zones: IRST and AKST

IRST runs on Iran Standard Time (IRST) at UTC+03:30. AKST runs on Alaska Standard Time (AKST) at UTC-09:00. That puts IRST 12 hours 30 minutes behind AKST — a difference of -12h 30m at the current offsets.

In practice, when it is 9:00 AM in IRST it is 8:30 PM in AKST on the previous day. Midnight in IRST is 11:30 AM in AKST. Neither zone observes daylight saving time, so the offset between them stays constant all year.

IRST to AKST time conversion table

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

Why people convert IRST to AKST time

Scheduling a call from IRST to AKST: a 10:00 AM start in IRST lands at 9:30 PM in AKST the previous day, so you can confirm the slot without doing the arithmetic yourself.
Handling a -12h 30m gap: IRST and AKST 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 AKST is 8:30 PM in IRST.
Keeping family and friends in sync: knowing that 8:00 PM in IRST is 7:30 AM in AKST makes it easy to avoid calling at 3 AM.

Always state the zone abbreviation, not just the hour. "3:00 PM IRST" is unambiguous; "3 PM" across a -12h 30m gap is not.
With a -12h 30m gap there is no shared 9-to-5 window, so alternate the early start: one week IRST takes the early slot, the next week AKST does.

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.

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).

Best time to call between IRST and AKST

With a -12h 30m offset there is no overlap inside a normal 9 AM – 5 PM day. AKST opens at 9:00 AM AKST, which is 8:30 PM in IRST, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

IRST and AKST have no shared working hours because of the -12h 30m gap. Teams need to alternate early starts or rely on asynchronous handovers.

IRST is 12 hours 30 minutes behind AKST (IRST UTC+03:30 → AKST UTC-09:00). 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

IRST

Does not observe DST

AKST

☀ Currently in DST

Standard: UTC-09:00 · DST: UTC-08:00

Clocks fall back on Sun, Nov 1, 2026

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 IRST and AKST?

IRST (IRST, UTC+03:30) is 12 hours 30 minutes behind AKST (AKST, UTC-09:00). The gap is currently -12h 30m.

How do I convert IRST time to AKST time?

Add -12h 30m to IRST local time. For example, 9:00 AM in IRST is 8:30 PM in AKST (previous day).

What time is it in AKST right now?

AKST uses AKST at UTC-09:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -12h 30m offset from IRST.