Tehran to Toronto
-7h 30mTehran
IRSTSOURCEToronto
EDTGreen rows indicate typical business hours (9 AM - 5 PM)
IRST and EDT on the World Map
The map below highlights the IRST (Iran Standard Time) and EDT (Eastern 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.
EST – Eastern Standard Time
UTC-05:00Eastern Standard Time (EST) is the time zone for the eastern United States and Canada, 5 hours behind UTC.
- •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.
About Tehran
WikipediaTehran operates on Iran Standard Time (IRST), UTC+3:30. Iran's unique half-hour offset makes Tehran time distinctive for regional business coordination.
Iran Standard Time (IRST) is one of few timezones with a 30-minute offset (UTC+3:30).
About Toronto
WikipediaToronto 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.
Toronto is the most multicultural city in the world - over 50% of residents were born outside Canada.
Comparing Time Zones: Tehran and Toronto
Tehran runs on Iran Standard Time (IRST) at UTC+03:30. Toronto runs on Eastern Daylight Time (EDT) at UTC-04:00, also currently on daylight saving time. That puts Tehran 7 hours 30 minutes behind Toronto — a difference of -7h 30m at the current offsets.
In practice, when it is 9:00 AM in Tehran it is 1:30 AM in Toronto. Midnight in Tehran is 4:30 PM in Toronto.Toronto observes daylight saving time while Tehran does not, so the gap narrows or widens by an hour part of the year.
Tehran to Toronto time conversion table
| Tehran (IRST) | Toronto (EDT) | Day |
|---|---|---|
| 12:00 AM | 4:30 PM | previous day |
| 6:00 AM | 10:30 PM | previous day |
| 7:00 AM | 11:30 PM | previous day |
| 8:00 AM | 12:30 AM | same day |
| 9:00 AM | 1:30 AM | same day |
| 12:00 PM | 4:30 AM | same day |
| 3:00 PM | 7:30 AM | same day |
| 5:00 PM | 9:30 AM | same day |
| 6:00 PM | 10:30 AM | same day |
| 9:00 PM | 1:30 PM | same day |
Why people convert Tehran to Toronto time
- Scheduling a call from Tehran to Toronto: a 10:00 AM start in Tehran lands at 2:30 AM in Toronto, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Tehran and Toronto are inside the 9-to-5 working day between 4:30 PM and 5:00 PM IRST time (9:00 AM–9:30 AM EDT). That is roughly 0 hours 30 minutes of usable overlap.
- Coordinating a Tehran-based team with Toronto contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.
- Always state the zone abbreviation, not just the hour. "3:00 PM IRST" is unambiguous; "3 PM" across a -7h 30m gap is not.
- Block 4:30 PM–5:00 PM IRST as the recurring meeting window if you work primarily from Tehran and need Toronto colleagues present.
- Toronto: 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 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.
Best time to call between Tehran and Toronto
Both Tehran and Toronto sit inside the 9 AM – 5 PM working day between 4:30 PM–5:00 PM IRST, which is 9:00 AM–9:30 AM EDT. That gives roughly 0 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
Tehran and Toronto overlap for only 30 minutes (4:30 PM–5:00 PM IRST), so meetings have to be booked precisely.
Tehran is 7 hours 30 minutes behind Toronto (IRST UTC+03:30 → EDT UTC-04:00). The shared working window is 4:30 PM–5:00 PM IRST. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
Tehran
Does not observe DST
Toronto
☀ Currently in DST
Standard: UTC-05:00 · DST: UTC-04:00
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 Tehran and Toronto?
Tehran (IRST, UTC+03:30) is 7 hours 30 minutes behind Toronto (EDT, UTC-04:00). The gap is currently -7h 30m.
How do I convert Tehran time to Toronto time?
Add -7h 30m to Tehran local time. For example, 9:00 AM in Tehran is 1:30 AM in Toronto.
What time is it in Toronto right now?
Toronto uses EDT at UTC-04:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -7h 30m offset from Tehran.
What is the best time to call Toronto from Tehran?
Call between 4:30 PM and 5:00 PM IRST — that maps to 9:00 AM–9:30 AM EDT and keeps both parties inside the working day.
Which is behind, Tehran or Toronto?
Tehran is 7 hours 30 minutes behind Toronto. When it is 12:00 PM in Tehran it is 4:30 AM in Toronto.
Do Tehran and Toronto use different time zones?
Tehran (Iran) uses IRST at UTC+03:30, while Toronto (Canada) uses EDT at UTC-04:00. The IANA identifiers are Asia/Tehran and America/Toronto.
Does daylight saving time affect the Tehran–Toronto 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 Tehran's time zone?
IRST also covers Tehran, Isfahan, Mashhad, Tabriz, Shiraz, Karaj.
Which countries use IRST, Tehran's zone?
IRST is used in Iran.
Is there a day difference between Tehran and Toronto?
Not normally. The -7h 30m gap only pushes the date over the previous day.
What is the time difference between Tehran and Toronto?
Toronto is -7h 30m from Tehran.
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 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 are the business hours in Tehran?
Standard business hours in Tehran are 8:00 AM - 4:00 PM IRST.
What are the business hours in Toronto?
Standard business hours in Toronto are 9:00 AM - 5:00 PM EST.
What is the best time to schedule a call between Tehran and Toronto?
The best overlap for a call is when both cities are in business hours. Tehran works 8:00 AM - 4:00 PM IRST and Toronto works 9:00 AM - 5:00 PM EST (-7h 30m difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in Tehran and Toronto?
Tehran uses IRR (﷼) while Toronto uses CAD (C$). Check current exchange rates when planning travel or business between these cities.
How do Tehran and Toronto compare in size?
Tehran has a population of approximately 9.4 million (metro: 16.8 million), while Toronto has approximately 2.9 million (metro: 6.3 million).
What are the major landmarks in Tehran and Toronto?
Tehran is known for Azadi Tower, Golestan Palace, Grand Bazaar. Toronto is famous for CN Tower, Royal Ontario Museum, Ripley's Aquarium.
Do Tehran and Toronto have stock exchanges?
Yes. Tehran has the TSE (Tehran Stock Exchange) and Toronto has the TSX (Toronto Stock Exchange). The -7h 30m time difference affects trading hour overlaps between these exchanges.
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 EST timezone?
Major cities in the EST timezone include New York City, Washington D.C., Miami, Toronto, Philadelphia, Atlanta, Boston, Montreal.
What is the UTC offset for EST?
Eastern Standard Time (EST) is at UTC-05:00. During daylight saving time, it shifts to EDT.
What should I know about the EST timezone?
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.
When is it midnight in Tehran, what time is it in Toronto?
When it is 12:00 AM (midnight) in Tehran (IRST), it is -7h 30m later in Toronto (EST).
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