IRST to Anchorage
-11h 30mIRST
IRSTSOURCEAnchorage
AKDTGreen rows indicate typical business hours (9 AM - 5 PM)
IRST and AKDT on the World Map
The map below highlights the IRST (Iran Standard Time) and AKDT (Alaska Standard Time) timezone regions across the globe.
IRST – Iran Standard Time
UTC+03:30Iran Standard Time (IRST) is the time zone for Iran, 3 hours and 30 minutes ahead of UTC.
- •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.
AKST – Alaska Standard Time
UTC-09:00Alaska Standard Time (AKST) is the time zone for the state of Alaska, 9 hours behind UTC.
- •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.
About Anchorage
WikipediaAnchorage operates on Alaska Time (AKST/AKDT), UTC-9. As a global air cargo hub, Anchorage connects Asian and American markets via polar routes.
Moose occasionally wander through the city streets.
Time Conversion Guide: IRST to Anchorage
IRST runs on Iran Standard Time (IRST) at UTC+03:30. Anchorage runs on Alaska Daylight Time (AKDT) at UTC-08:00, also currently on daylight saving time. That puts IRST 11 hours 30 minutes behind Anchorage — a difference of -11h 30m at the current offsets.
In practice, when it is 9:00 AM in IRST it is 9:30 PM in Anchorage on the previous day. Midnight in IRST is 12:30 PM in Anchorage.Anchorage observes daylight saving time while IRST does not, so the gap narrows or widens by an hour part of the year.
IRST to Anchorage time conversion table
| IRST (IRST) | Anchorage (AKDT) | Day |
|---|---|---|
| 12:00 AM | 12:30 PM | previous day |
| 6:00 AM | 6:30 PM | previous day |
| 7:00 AM | 7:30 PM | previous day |
| 8:00 AM | 8:30 PM | previous day |
| 9:00 AM | 9:30 PM | previous day |
| 12:00 PM | 12:30 AM | same day |
| 3:00 PM | 3:30 AM | same day |
| 5:00 PM | 5:30 AM | same day |
| 6:00 PM | 6:30 AM | same day |
| 9:00 PM | 9:30 AM | same day |
Why people convert IRST to Anchorage time
- Scheduling a call from IRST to Anchorage: a 10:00 AM start in IRST lands at 10:30 PM in Anchorage the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -11h 30m gap: IRST and Anchorage 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 Anchorage is 9:30 PM in IRST.
- Booking travel or deliveries: tracking Anchorage local time against IRST keeps pickup windows and arrival estimates honest across the -11h 30m offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM IRST" 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 IRST takes the early slot, the next week Anchorage does.
- Anchorage: Clocks fall back on Sun, Nov 1, 2026. Any meeting series spanning that date will shift by an hour in local time.
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 Anchorage
With a -11h 30m offset there is no overlap inside a normal 9 AM – 5 PM day. Anchorage opens at 9:00 AM AKDT, which is 9:30 PM in IRST, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
IRST and Anchorage have no shared working hours because of the -11h 30m gap. Teams need to alternate early starts or rely on asynchronous handovers.
IRST is 11 hours 30 minutes behind Anchorage (IRST UTC+03:30 → AKDT UTC-08:00). 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
Anchorage
☀ 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:
Frequently Asked Questions
What is the time difference between IRST and Anchorage?
IRST (IRST, UTC+03:30) is 11 hours 30 minutes behind Anchorage (AKDT, UTC-08:00). The gap is currently -11h 30m.
How do I convert IRST time to Anchorage time?
Add -11h 30m to IRST local time. For example, 9:00 AM in IRST is 9:30 PM in Anchorage (previous day).
What time is it in Anchorage right now?
Anchorage uses AKDT at UTC-08:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -11h 30m offset from IRST.
What is the best time to call Anchorage from IRST?
There is no shared working-hours window because of the -11h 30m gap. The closest option is 1:00 PM in IRST, which is 1:30 AM in Anchorage.
Which is behind, IRST or Anchorage?
IRST is 11 hours 30 minutes behind Anchorage. When it is 12:00 PM in IRST it is 12:30 AM in Anchorage.
Do IRST and Anchorage use different time zones?
IRST uses IRST at UTC+03:30, while Anchorage (USA) uses AKDT at UTC-08:00. The IANA identifiers are Asia/Tehran and America/Anchorage.
Does daylight saving time affect the IRST–Anchorage 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.
Which other cities share IRST's time zone?
IRST also covers Tehran, Isfahan, Mashhad, Tabriz, Shiraz, Karaj.
Which countries use IRST, IRST's zone?
IRST is used in Iran.
Is there a day difference between IRST and Anchorage?
Not normally. The -11h 30m gap only pushes the date over the previous day.
What is the time difference between IRST and Anchorage?
Anchorage is -11h 30m from IRST.
What timezone is IRST in?
IRST operates on its local timezone.
What timezone is Anchorage in?
Anchorage operates on Alaska Time (AKST/AKDT), UTC-9. As a global air cargo hub, Anchorage connects Asian and American markets via polar routes.
What are the business hours in Anchorage?
Standard business hours in Anchorage are 8:00 AM - 5:00 PM AKST.
Which countries use IRST (Iran Standard Time)?
IRST is used in Iran.
Does IRST observe daylight saving time?
Yes, IRST switches to IRDT during summer months.
What are some interesting 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).
Which cities are in the AKST timezone?
Major cities in the AKST timezone include Anchorage, Fairbanks, Juneau, Sitka, Wasilla.
What is the UTC offset for AKST?
Alaska Standard Time (AKST) is at UTC-09:00. During daylight saving time, it shifts to AKDT.
What should I know about the AKST timezone?
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.
When is it midnight in IRST, what time is it in Anchorage?
When it is 12:00 AM (midnight) in IRST (IRST), it is -11h 30m later in Anchorage (AKST).
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