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).

Toronto to Tehran

+7h 30m

Toronto

EDTSOURCE

Canada · UTC-04:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Tehran

IRST

Iran · UTC+03:30

HH07

MM30

19:30 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Toronto

Tehran

12:00 AM

7:30 AM

2:00 AM

9:30 AM

4:00 AM

11:30 AM

6:00 AM

1:30 PM

8:00 AM

3:30 PM

10:00 AM

5:30 PM

12:00 PM

7:30 PM

2:00 PM

9:30 PM

4:00 PM

11:30 PM

6:00 PM

1:30 AM+1

8:00 PM

3:30 AM+1

10:00 PM

5:30 AM+1

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

EDT and IRST on the World Map

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

EDT Zone

→

IRST Zone

Explore all world timezones interactively →

EST – Eastern Standard Time

UTC-05:00

Eastern Standard Time (EST) is the time zone for the eastern United States and Canada, 5 hours behind UTC.

Countries in EST

United States (Eastern)Canada (Ontario, Quebec)Mexico (Quintana Roo)PanamaJamaicaCayman IslandsHaitiBahamasTurks and CaicosColombiaPeruEcuador

Major Cities in EST

New York CityWashington D.C.MiamiTorontoPhiladelphiaAtlantaBostonMontrealDetroitCharlotteIndianapolisOttawaTampaOrlandoClevelandPittsburgh

Key Facts about EST

•EST is the most widely used time zone in the United States by population.
•The New York Stock Exchange (NYSE) and NASDAQ operate on Eastern Time, opening at 9:30 AM EST.
•23 US states are fully or partially in the Eastern Time Zone.
•EST was established by the Standard Time Act of 1918.
•Over 47% of the US population lives in the Eastern Time Zone.

Daylight Saving:Yes – switches to EDT

Learn more about EST 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 Toronto

Wikipedia

Toronto shares Eastern Time (EST/EDT) with New York. As Canada's largest city and financial center, Toronto's TSX is among North America's largest stock exchanges.

Population:2.9 million

Metro:6.3 million

Business Hours:9:00 AM - 5:00 PM EST

Currency:CAD (C$)

Stock Exchange:TSX (Toronto Stock Exchange)

Key Landmarks

CN TowerRoyal Ontario MuseumRipley's AquariumCasa LomaSt. Lawrence Market

Did You Know?

Toronto is the most multicultural city in the world - over 50% of residents were born outside Canada.

Learn more about EDT 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 →

Toronto to Tehran Time Difference – Complete Guide

Toronto runs on Eastern Daylight Time (EDT) at UTC-04:00, currently observing daylight saving time. Tehran runs on Iran Standard Time (IRST) at UTC+03:30. That puts Toronto 7 hours 30 minutes ahead of Tehran — a difference of +7h 30m at the current offsets.

In practice, when it is 9:00 AM in Toronto it is 4:30 PM in Tehran. Midnight in Toronto is 7:30 AM in Tehran.Toronto observes daylight saving time while Tehran does not, so the gap narrows or widens by an hour part of the year.

Toronto to Tehran time conversion table

Toronto (EDT)	Tehran (IRST)	Day
12:00 AM	7:30 AM	same day
6:00 AM	1:30 PM	same day
7:00 AM	2:30 PM	same day
8:00 AM	3:30 PM	same day
9:00 AM	4:30 PM	same day
12:00 PM	7:30 PM	same day
3:00 PM	10:30 PM	same day
5:00 PM	12:30 AM	next day
6:00 PM	1:30 AM	next day
9:00 PM	4:30 AM	next day

Why people convert Toronto to Tehran time

Scheduling a call from Toronto to Tehran: a 10:00 AM start in Toronto lands at 5:30 PM in Tehran, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Toronto and Tehran are inside the 9-to-5 working day between 9:00 AM and 9:30 AM EDT time (4:30 PM–5:00 PM IRST). That is roughly 0 hours 30 minutes of usable overlap.
Booking travel or deliveries: tracking Tehran local time against Toronto keeps pickup windows and arrival estimates honest across the +7h 30m offset.

Always state the zone abbreviation, not just the hour. "3:00 PM EDT" is unambiguous; "3 PM" across a +7h 30m gap is not.
Block 9:00 AM–9:30 AM EDT as the recurring meeting window if you work primarily from Toronto and need Tehran colleagues present.
Toronto: Clocks fall back on Sun, Nov 1, 2026. Re-check this page after that date because the offset changes and so does the +7h 30m gap.

About EST (Eastern Standard Time)

Eastern Standard Time (EST) is observed during the winter months in the eastern part of North America. It covers 23 US states and parts of Canada including Ontario and Quebec. EST is the most populous time zone in the United States, home to major financial centers like New York City and global organizations headquartered in Washington D.C. During daylight saving time (March–November), clocks shift to Eastern Daylight Time (EDT, UTC-04:00). The time zone also covers parts of the Caribbean and Central America including Panama, Jamaica, and the Cayman Islands.

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 Toronto and Tehran

Both Toronto and Tehran sit inside the 9 AM – 5 PM working day between 9:00 AM–9:30 AM EDT, which is 4:30 PM–5:00 PM IRST. That gives roughly 0 hours and 30 minutes of shared time — the safest window for a live call or meeting.

Business hours overlap

Toronto and Tehran overlap for only 30 minutes (9:00 AM–9:30 AM EDT), so meetings have to be booked precisely.

Toronto is 7 hours 30 minutes ahead of Tehran (EDT UTC-04:00 → IRST UTC+03:30). The shared working window is 9:00 AM–9:30 AM EDT. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

Toronto

☀ Currently in DST

Standard: UTC-05:00 · DST: UTC-04:00

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 Toronto and Tehran?

Toronto (EDT, UTC-04:00) is 7 hours 30 minutes ahead of Tehran (IRST, UTC+03:30). The gap is currently +7h 30m.

How do I convert Toronto time to Tehran time?

Add +7h 30m to Toronto local time. For example, 9:00 AM in Toronto is 4:30 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 +7h 30m offset from Toronto.

What is the best time to call Tehran from Toronto?

Call between 9:00 AM and 9:30 AM EDT — that maps to 4:30 PM–5:00 PM IRST and keeps both parties inside the working day.

Which is ahead, Toronto or Tehran?

Toronto is 7 hours 30 minutes ahead of Tehran. When it is 12:00 PM in Toronto it is 7:30 PM in Tehran.

Do Toronto and Tehran use different time zones?

Toronto (Canada) uses EDT at UTC-04:00, while Tehran (Iran) uses IRST at UTC+03:30. The IANA identifiers are America/Toronto and Asia/Tehran.

Does daylight saving time affect the Toronto–Tehran difference?

Yes at the moment: Toronto is on daylight saving time and Tehran is not, so the +7h 30m gap shifts by an hour when exactly one of them changes clocks.

Which other cities share Toronto's time zone?

EDT also covers New York City, Washington D.C., Miami, Toronto, Philadelphia, Atlanta, Boston, Montreal and 8 more.

Which countries use EDT, Toronto's zone?

EDT is used in United States (Eastern), Canada (Ontario, Quebec), Mexico (Quintana Roo), Panama, Jamaica, Cayman Islands, Haiti, Bahamas and 4 more.

Is there a day difference between Toronto and Tehran?

Not normally. The +7h 30m gap only pushes the date over for late-evening times.

What is the time difference between Toronto and Tehran?

Tehran is +7h 30m from Toronto.

What timezone is Toronto in?

Toronto shares Eastern Time (EST/EDT) with New York. As Canada's largest city and financial center, Toronto's TSX is among North America's largest stock exchanges.

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 Toronto?

Standard business hours in Toronto are 9:00 AM - 5:00 PM EST.

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 Toronto and Tehran?

The best overlap for a call is when both cities are in business hours. Toronto works 9:00 AM - 5:00 PM EST and Tehran works 8:00 AM - 4:00 PM IRST (+7h 30m difference). Try scheduling during the overlapping window for maximum convenience.

What currencies are used in Toronto and Tehran?

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

How do Toronto and Tehran compare in size?

Toronto has a population of approximately 2.9 million (metro: 6.3 million), while Tehran has approximately 9.4 million (metro: 16.8 million).

What are the major landmarks in Toronto and Tehran?

Toronto is known for CN Tower, Royal Ontario Museum, Ripley's Aquarium. Tehran is famous for Azadi Tower, Golestan Palace, Grand Bazaar.

Do Toronto and Tehran have stock exchanges?

Yes. Toronto has the TSX (Toronto Stock Exchange) and Tehran has the TSE (Tehran Stock Exchange). The +7h 30m time difference affects trading hour overlaps between these exchanges.

Which countries use EST (Eastern Standard Time)?

EST is used in United States (Eastern), Canada (Ontario, Quebec), Mexico (Quintana Roo), Panama, Jamaica, Cayman Islands, and 6 more countries.

Does EST observe daylight saving time?

Yes, EST switches to EDT during summer months.

What are some interesting facts about EST?

EST is the most widely used time zone in the United States by population. The New York Stock Exchange (NYSE) and NASDAQ operate on Eastern Time, opening at 9:30 AM EST.