World Timezones

EST to IRST Converter

Compare IRST to EST instead
Eastern Time12:35 amFri, Jun 5
Eastern TimeEDT
North America · UTC-4
12:35 amFri, Jun 5
12a
1a
2a
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
11p
Iran Standard TimeIRST
Middle East · UTC+3:30
8:05 amFri, Jun 5
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
11p
12a
1a
2a
3a
4a
5a
6a

Offset

The time difference between Eastern Time and Iran Standard Time is 7.5 hours.

7.5 hours

Eastern Time (EDT) is behind Iran Standard Time (IRST).

EDT: UTC-4

IRST: UTC+3:30

Eastern Time is currently observing daylight saving time; Iran Standard Time is not.

When to schedule

Business-hours overlap: 9 AM–10 AM in Eastern Time (4 PM–5 PM in Iran Standard Time).

Both teams are in working hours during this window on weekdays.

Suggested time: 9:00 AM Eastern Time (4:30 PM Iran Standard Time).

This window may shift by an hour during daylight saving time.

Public holidays in 2026

National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.

United States

  • New Year's DayThu, Jan 1
  • Martin Luther King, Jr. DayMon, Jan 19
  • Presidents DayMon, Feb 16
  • Memorial DayMon, May 25
  • Juneteenth National Independence DayFri, Jun 19
  • Independence DayFri, Jul 3
  • Labour DayMon, Sep 7
  • Columbus DayMon, Oct 12
  • Veterans DayWed, Nov 11
  • Thanksgiving DayThu, Nov 26
  • Christmas DayFri, Dec 25

About these zones

Eastern Time is also known as EST, or EDT. To call United States, dial +1.

Iran Standard Time is also known as IRST. To call Iran, dial +98.

Iran Standard Time is approximately 6,100 miles northeast of Eastern Time.

Quick reference

Full 24-hour conversion table — tap any time to open it in the converter.

ESTIRSTDay
12:00 am7:30 amSame day
1:00 am8:30 amSame day
2:00 am9:30 amSame day
3:00 am10:30 amSame day
4:00 am11:30 amSame day
5:00 am12:30 pmSame day
6:00 am1:30 pmSame day
7:00 am2:30 pmSame day
8:00 am3:30 pmSame day
9:00 am4:30 pmSame day
10:00 am5:30 pmSame day
11:00 am6:30 pmSame day
12:00 pm7:30 pmSame day
1:00 pm8:30 pmSame day
2:00 pm9:30 pmSame day
3:00 pm10:30 pmSame day
4:00 pm11:30 pmSame day
5:00 pm12:30 am+1 day
6:00 pm1:30 am+1 day
7:00 pm2:30 am+1 day
8:00 pm3:30 am+1 day
9:00 pm4:30 am+1 day
10:00 pm5:30 am+1 day
11:00 pm6:30 am+1 day

Daylight saving time

Eastern Time observes daylight saving time; Iran Standard Time does not. The offset between the two zones changes when Eastern Time transitions: on Sunday, November 1, 2026, clocks fall back from EDT to EST.

See the daylight saving time page for transition dates across every time zone.

Daylight today

Eastern Time
Sunrise
5:27 AM
Sunset
8:24 PM
Day length
14h 58m
Iran Standard Time
Sunrise
4:50 AM
Sunset
7:18 PM
Day length
14h 28m

Daylight overlap: 6h 21m — 5:27 AM–11:48 AM in Eastern Time (12:57 PM–7:18 PM in Iran Standard Time). Both locations are in daylight during this window.

Cities in these zones

Cities in Iran Standard Time

Browse all cities to see the current local time anywhere.

Airports in these zones

Airports in Eastern Time

  • EWR
  • HPN
  • JFK
  • LGA
  • TEB
  • ILG
  • PHL
  • TTN
  • CLT
  • USA

Airports in Iran Standard Time

  • IKA
  • THR
  • MHD
  • IFN
  • PYK
  • TBZ

Related conversions

Common conversions

What is 9:00 am EST in IRST?
9:00 am EST is 4:30 pm IRST.
What is 12:00 pm EST in IRST?
12:00 pm EST is 7:30 pm IRST.
What is 12:30 pm EST in IRST?
12:30 pm EST is 8:00 pm IRST.
What is 2:00 pm EST in IRST?
2:00 pm EST is 9:30 pm IRST.
What is 5:00 pm EST in IRST?
5:00 pm EST is 12:30 am IRST, the next day.
What is 11:30 pm EST in IRST?
11:30 pm EST is 7:00 am IRST, the next day.