What's the current time difference between Tehran and EST?

Right now, EST (EST · Eastern Time) is −7.5h relative to Tehran (Tehran). The number is live and reflects the current daylight-saving status of both zones.

Does this converter account for daylight saving time?

Yes. The math is done against IANA's tz database via Intl.DateTimeFormat, so DST shifts in either zone show up immediately at the transition. Around DST boundaries the conversion can move by an hour from one week to the next — this page always reflects the current rule.

Why does the TO column sometimes show "+1d" or "−1d"?

When the Tehran hour lands on a different calendar day in EST, we flag it so you don't accidentally schedule a meeting on the wrong date. Tehran 11 PM is often the next day in eastern-hemisphere zones, for example.

How do I schedule a meeting that works for both zones?

Look at the row highlighted lume green — that's the longest contiguous block where both Tehran and EST are in standard working hours (9 AM–5 PM local). Open the planner from the link above to lock a specific time and share a DST-stable link with the other party.

Tehran to EST

Tehran ↔ EST · Eastern Time. Right now, EST is −7.5h relative to Tehran. DST is honored live.

From

Tehran

—

EST

—

00:00Tehran hour of day23:30

Live offset

−7.5h

Tehran (May 24) ↔ EST (May 23)

If Tehran or EST just shifted for daylight saving, that's already reflected.

Best meeting overlap

No 9-to-5 overlap.

Working hours = 9 AM – 5 PM in each zone.

Hour-by-hour

Tehran → EST, every hour

Tehran · May 24EST · May 23

12:00 AM4:30 PM
1:00 AM5:30 PM
2:00 AM6:30 PM
3:00 AM7:30 PM
4:00 AM8:30 PM
5:00 AM9:30 PM
6:00 AM10:30 PM
7:00 AM11:30 PM
8:00 AM+1d12:30 AM
9:00 AM+1d1:30 AM
10:00 AM+1d2:30 AM
11:00 AM+1d3:30 AM
12:00 PM+1d4:30 AM
1:00 PM+1d5:30 AM
2:00 PM+1d6:30 AM
3:00 PM+1d7:30 AM
4:00 PM+1d8:30 AM
5:00 PM+1d9:30 AM
6:00 PM+1d10:30 AM
7:00 PM+1d11:30 AM
8:00 PM+1d12:30 PM
9:00 PM+1d1:30 PM
10:00 PM+1d2:30 PM
11:00 PM+1d3:30 PM

Both zones in working hours±1d = the TO side lands on a different calendar day

FAQ

Tehran ↔ EST, questions answered

What's the current time difference between Tehran and EST?: Right now, EST (EST · Eastern Time) is −7.5h relative to Tehran (Tehran). The number is live and reflects the current daylight-saving status of both zones.
Does this converter account for daylight saving time?: Yes. The math is done against IANA's tz database via Intl.DateTimeFormat, so DST shifts in either zone show up immediately at the transition. Around DST boundaries the conversion can move by an hour from one week to the next — this page always reflects the current rule.
Why does the TO column sometimes show "+1d" or "−1d"?: When the Tehran hour lands on a different calendar day in EST, we flag it so you don't accidentally schedule a meeting on the wrong date. Tehran 11 PM is often the next day in eastern-hemisphere zones, for example.
How do I schedule a meeting that works for both zones?: Look at the row highlighted lume green — that's the longest contiguous block where both Tehran and EST are in standard working hours (9 AM–5 PM local). Open the planner from the link above to lock a specific time and share a DST-stable link with the other party.

Reverse — EST to Tehran Time in Tehran Open in planner