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).

Edmonton to Tehran

+9h 30m

Edmonton

MDTSOURCE

Canada · UTC-06:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Tehran

IRST

Iran · UTC+03:30

HH09

MM30

21:30 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Edmonton

Tehran

12:00 AM

9:30 AM

2:00 AM

11:30 AM

4:00 AM

1:30 PM

6:00 AM

3:30 PM

8:00 AM

5:30 PM

10:00 AM

7:30 PM

12:00 PM

9:30 PM

2:00 PM

11:30 PM

4:00 PM

1:30 AM+1

6:00 PM

3:30 AM+1

8:00 PM

5:30 AM+1

10:00 PM

7:30 AM+1

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

MDT and IRST on the World Map

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

MDT Zone

→

IRST Zone

Explore all world timezones interactively →

MST – Mountain Standard Time

UTC-07:00

Mountain Standard Time (MST) is the time zone for the Mountain region of North America, 7 hours behind UTC.

Countries in MST

United States (Mountain)Canada (Alberta)Mexico (Chihuahua, Sonora)

Major Cities in MST

DenverPhoenixSalt Lake CityCalgaryEdmontonAlbuquerqueEl PasoTucsonBoiseCiudad Juárez

Key Facts about MST

•Arizona does not observe daylight saving time, staying on MST year-round.
•The Navajo Nation in Arizona does observe DST, unlike the rest of the state.
•Denver, the 'Mile High City', is the largest city fully in MST.
•MST covers 6 US states entirely and parts of several others.

Daylight Saving:Yes – switches to MDT

Learn more about MST 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 Edmonton

Wikipedia

Edmonton operates on Mountain Time (MST/MDT), same as Denver. As Alberta's capital and an energy hub, Edmonton time aligns with Western Canadian markets.

Population:1 million

Metro:1.4 million

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

Currency:CAD (C$)

Stock Exchange:N/A (Uses TSX)

Key Landmarks

West Edmonton MallFort Edmonton ParkArt Gallery of AlbertaMuttart ConservatoryRiver Valley

Did You Know?

The city has the most extensive urban parkland in North America.

Learn more about MDT timezone →

About Tehran

Wikipedia

Tehran operates on Iran Standard Time (IRST), UTC+3:30. Iran's unique half-hour offset makes Tehran time distinctive for regional business coordination.

Population:9.4 million

Metro:16.8 million

Business Hours:8:00 AM - 4:00 PM IRST

Currency:IRR (﷼)

Stock Exchange:TSE (Tehran Stock Exchange)

Key Landmarks

Azadi TowerGolestan PalaceGrand BazaarMilad TowerTabiat Bridge

Did You Know?

Iran Standard Time (IRST) is one of few timezones with a 30-minute offset (UTC+3:30).

Learn more about IRST timezone →

Edmonton vs Tehran: Offsets, DST and Best Call Times

Edmonton runs on Mountain Daylight Time (MDT) at UTC-06:00, currently observing daylight saving time. Tehran runs on Iran Standard Time (IRST) at UTC+03:30. That puts Edmonton 9 hours 30 minutes ahead of Tehran — a difference of +9h 30m at the current offsets.

In practice, when it is 9:00 AM in Edmonton it is 6:30 PM in Tehran. Midnight in Edmonton is 9:30 AM in Tehran.Edmonton observes daylight saving time while Tehran does not, so the gap narrows or widens by an hour part of the year.

Edmonton to Tehran time conversion table

Edmonton (MDT)	Tehran (IRST)	Day
12:00 AM	9:30 AM	same day
6:00 AM	3:30 PM	same day
7:00 AM	4:30 PM	same day
8:00 AM	5:30 PM	same day
9:00 AM	6:30 PM	same day
12:00 PM	9:30 PM	same day
3:00 PM	12:30 AM	next day
5:00 PM	2:30 AM	next day
6:00 PM	3:30 AM	next day
9:00 PM	6:30 AM	next day

Why people convert Edmonton to Tehran time

Scheduling a call from Edmonton to Tehran: a 10:00 AM start in Edmonton lands at 7:30 PM in Tehran, so you can confirm the slot without doing the arithmetic yourself.
Handling a +9h 30m gap: Edmonton and Tehran 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 Tehran is 6:30 PM in Edmonton.
Keeping family and friends in sync: knowing that 8:00 PM in Edmonton is 5:30 AM in Tehran makes it easy to avoid calling at 3 AM.

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

About MST (Mountain Standard Time)

Mountain Standard Time (MST) covers the Rocky Mountain region of the United States and Canada. Arizona is notable for not observing daylight saving time, staying on MST year-round (except the Navajo Nation). The time zone includes major cities like Denver, Phoenix, Calgary, and Salt Lake City. During summer, most areas switch to Mountain Daylight Time (MDT, UTC-06:00).

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 Edmonton and Tehran

With a +9h 30m offset there is no overlap inside a normal 9 AM – 5 PM day. Tehran opens at 9:00 AM IRST, which is 6:30 PM in Edmonton, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

Edmonton and Tehran have no shared working hours because of the +9h 30m gap. Teams need to alternate early starts or rely on asynchronous handovers.

Edmonton is 9 hours 30 minutes ahead of Tehran (MDT UTC-06:00 → 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

Edmonton

☀ Currently in DST

Standard: UTC-07:00 · DST: UTC-06:00

Clocks fall back on Sun, Nov 1, 2026

Tehran

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 Edmonton and Tehran?

Edmonton (MDT, UTC-06:00) is 9 hours 30 minutes ahead of Tehran (IRST, UTC+03:30). The gap is currently +9h 30m.

How do I convert Edmonton time to Tehran time?

Add +9h 30m to Edmonton local time. For example, 9:00 AM in Edmonton is 6:30 PM in Tehran.

What time is it in Tehran right now?

Tehran 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 +9h 30m offset from Edmonton.

What is the best time to call Tehran from Edmonton?

There is no shared working-hours window because of the +9h 30m gap. The closest option is 1:00 PM in Edmonton, which is 10:30 PM in Tehran.

Which is ahead, Edmonton or Tehran?

Edmonton is 9 hours 30 minutes ahead of Tehran. When it is 12:00 PM in Edmonton it is 9:30 PM in Tehran.

Do Edmonton and Tehran use different time zones?

Edmonton (Canada) uses MDT at UTC-06:00, while Tehran (Iran) uses IRST at UTC+03:30. The IANA identifiers are America/Edmonton and Asia/Tehran.

Does daylight saving time affect the Edmonton–Tehran difference?

Yes at the moment: Edmonton is on daylight saving time and Tehran is not, so the +9h 30m gap shifts by an hour when exactly one of them changes clocks.

Which other cities share Edmonton's time zone?

MDT also covers Denver, Phoenix, Salt Lake City, Calgary, Edmonton, Albuquerque, El Paso, Tucson and 2 more.

Which countries use MDT, Edmonton's zone?

MDT is used in United States (Mountain), Canada (Alberta), Mexico (Chihuahua, Sonora).

Is there a day difference between Edmonton and Tehran?

Not normally. The +9h 30m gap only pushes the date over for late-evening times.

What is the time difference between Edmonton and Tehran?

Tehran is +9h 30m from Edmonton.

What timezone is Edmonton in?

Edmonton operates on Mountain Time (MST/MDT), same as Denver. As Alberta's capital and an energy hub, Edmonton time aligns with Western Canadian markets.

What timezone is Tehran in?

Tehran operates on Iran Standard Time (IRST), UTC+3:30. Iran's unique half-hour offset makes Tehran time distinctive for regional business coordination.

What are the business hours in Edmonton?

Standard business hours in Edmonton are 8:00 AM - 5:00 PM MST.

What are the business hours in Tehran?

Standard business hours in Tehran are 8:00 AM - 4:00 PM IRST.

What is the best time to schedule a call between Edmonton and Tehran?

The best overlap for a call is when both cities are in business hours. Edmonton works 8:00 AM - 5:00 PM MST and Tehran works 8:00 AM - 4:00 PM IRST (+9h 30m difference). Try scheduling during the overlapping window for maximum convenience.

What currencies are used in Edmonton and Tehran?

Edmonton uses CAD (C$) while Tehran uses IRR (﷼). Check current exchange rates when planning travel or business between these cities.

How do Edmonton and Tehran compare in size?

Edmonton has a population of approximately 1 million (metro: 1.4 million), while Tehran has approximately 9.4 million (metro: 16.8 million).

What are the major landmarks in Edmonton and Tehran?

Edmonton is known for West Edmonton Mall, Fort Edmonton Park, Art Gallery of Alberta. Tehran is famous for Azadi Tower, Golestan Palace, Grand Bazaar.

Do Edmonton and Tehran have stock exchanges?

Yes. Edmonton has the N/A (Uses TSX) and Tehran has the TSE (Tehran Stock Exchange). The +9h 30m time difference affects trading hour overlaps between these exchanges.

Which countries use MST (Mountain Standard Time)?

MST is used in United States (Mountain), Canada (Alberta), Mexico (Chihuahua, Sonora).

Does MST observe daylight saving time?

Yes, MST switches to MDT during summer months.

What are some interesting facts about MST?

Arizona does not observe daylight saving time, staying on MST year-round. The Navajo Nation in Arizona does observe DST, unlike the rest of the state.