EDT to Tehran
+7h 30mEDT
EDTSOURCETehran
IRSTGreen rows indicate typical business hours (9 AM - 5 PM)
EDT and IRST on the World Map
The map below highlights the EDT (Eastern Daylight Time) and IRST (Iran Standard Time) timezone regions across the globe.
EDT – Eastern Daylight Time
UTC-04:00Eastern Daylight Time (EDT) is the daylight saving time observed in the Eastern Time Zone, 4 hours behind UTC.
- •EDT is observed from the second Sunday of March to the first Sunday of November.
- •During EDT, the US East Coast is only 4 hours behind London (instead of 5).
- •Not all EST locations switch to EDT – Panama and Jamaica stay on EST year-round.
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.
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).
EDT to Tehran Time Difference – Complete Guide
EDT runs on Eastern Daylight Time (EDT) at UTC-04:00. Tehran runs on Iran Standard Time (IRST) at UTC+03:30. That puts EDT 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 EDT it is 4:30 PM in Tehran. Midnight in EDT is 7:30 AM in Tehran. Neither zone observes daylight saving time, so the offset between them stays constant all year.
EDT to Tehran time conversion table
| EDT (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 EDT to Tehran time
- Scheduling a call from EDT to Tehran: a 10:00 AM start in EDT lands at 5:30 PM in Tehran, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both EDT 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.
- Keeping family and friends in sync: knowing that 8:00 PM in EDT is 3:30 AM in Tehran makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM 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 EDT and need Tehran colleagues present.
About EDT (Eastern Daylight Time)
Eastern Daylight Time (EDT) is used during the summer months (second Sunday of March to the first Sunday of November) in the Eastern Time Zone. During EDT, clocks are advanced by one hour to take advantage of longer daylight hours. Not all locations in the Eastern Time Zone observe DST – Panama, Jamaica, and most of the Caribbean remain on EST year-round.
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 EDT and Tehran
Both EDT 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
EDT and Tehran overlap for only 30 minutes (9:00 AM–9:30 AM EDT), so meetings have to be booked precisely.
EDT 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
EDT
☀ 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:
Frequently Asked Questions
What is the time difference between EDT and Tehran?
EDT (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 EDT time to Tehran time?
Add +7h 30m to EDT local time. For example, 9:00 AM in EDT 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 EDT.
What is the best time to call Tehran from EDT?
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, EDT or Tehran?
EDT is 7 hours 30 minutes ahead of Tehran. When it is 12:00 PM in EDT it is 7:30 PM in Tehran.
Do EDT and Tehran use different time zones?
EDT uses EDT at UTC-04:00, while Tehran (Iran) uses IRST at UTC+03:30. The IANA identifiers are America/New_York and Asia/Tehran.
Does daylight saving time affect the EDT–Tehran difference?
Neither zone observes daylight saving time, so the +7h 30m offset between EDT and Tehran is fixed all year.
Which other cities share EDT's time zone?
EDT also covers New York City, Washington D.C., Toronto, Miami, Philadelphia, Atlanta, Boston, Montreal.
Which countries use EDT, EDT's zone?
EDT is used in United States (Eastern), Canada (Ontario, Quebec), Bahamas, Haiti, Turks and Caicos.
Is there a day difference between EDT and Tehran?
Not normally. The +7h 30m gap only pushes the date over for late-evening times.
What is the time difference between EDT and Tehran?
Tehran is +7h 30m from EDT.
What timezone is EDT in?
EDT operates on its local timezone.
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 Tehran?
Standard business hours in Tehran are 8:00 AM - 4:00 PM IRST.
Which countries use EDT (Eastern Daylight Time)?
EDT is used in United States (Eastern), Canada (Ontario, Quebec), Bahamas, Haiti, Turks and Caicos.
Does EDT observe daylight saving time?
Yes, EDT switches to EST during summer months.
What are some interesting facts about EDT?
EDT is observed from the second Sunday of March to the first Sunday of November. During EDT, the US East Coast is only 4 hours behind London (instead of 5).
Which cities are in the IRST timezone?
Major cities in the IRST timezone include Tehran, Isfahan, Mashhad, Tabriz, Shiraz, Karaj.
What is the UTC offset for IRST?
Iran Standard Time (IRST) is at UTC+03:30. During daylight saving time, it shifts to IRDT.
What should I know about the IRST timezone?
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).
When is it midnight in EDT, what time is it in Tehran?
When it is 12:00 AM (midnight) in EDT (EDT), it is +7h 30m later in Tehran (IRST).
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