IRST to EST Converter
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Add one or more places to compare local times, adjust the date, and share the result.
Quick answers
Selected conversion
3:30 pm15:30 IRST (UTC+3:30), Oct 12, 2026 = 8:00 am08:00 EDT (UTC-4), Oct 12, 2026
IRST is 7 hours and 30 minutes ahead of EDT.
IRST and EST (US winter time, UTC-5) examples
These examples always use IRST (UTC+3:30) and EST (UTC-5). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
IRST is 8 hours and 30 minutes ahead of EST.
EST is US Eastern winter time (early November to mid-March). The rest of the year New York uses EDT (UTC-4), one hour later. For Eastern Time that follows daylight saving time, use IRST to ET. For daylight-time examples, use IRST to EDT.
How the time difference changes
For most of the year, IRST is 7 hours and 30 minutes ahead of EDT. From Nov 1, 2026 to Mar 14, 2027, IRST is 8 hours and 30 minutes ahead of EST.
For most of the year, working hours of 9:00 am to 5:00 pm in IRST correspond to 1:30 am to 9:30 am in EDT. At other times of the year, working hours of 9:00 am to 5:00 pm in IRST correspond to 12:30 am to 8:30 am in EST.For most of the year, working hours of 09:00 to 17:00 in IRST correspond to 01:30 to 09:30 in EDT. At other times of the year, working hours of 09:00 to 17:00 in IRST correspond to 00:30 to 08:30 in EST.
Compare IRST time with EST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Iran Standard Time is 7 hours and 30 minutes ahead of Eastern Daylight Time.
3:30 pm15:30 in IRST is 8:00 am08:00 in EDT
IRST to EDT call time
Best time for a conference call or a meeting is between 4:30pm-5pm16:30-17:00 in IRST which corresponds to 9am-9:30am09:00-09:30 in EDT
3:30 pm15:30 Iran Standard Time (IRST). Offset UTC +3:30 hours
8:00 am08:00 Eastern Daylight Time (EDT). Offset UTC -4:00 hours
3:30 pm15:30 IRST / 8:00 am08:00 EDT
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Iran Standard Time
Offset: IRST is 3 hours and 30 minutes ahead of Greenwich Mean Time (GMT).
Countries using this time zone: Iran
Principal Cities: The largest city in the IRST time zone is Tehran in Iran, with about 7.153 million people. Other major cities in this time zone include Mashhad, Isfahan, Karaj, Tabriz.
Daylight Saving: Clocks in Iran Standard Time (IRST) do not change for daylight saving time, so IRST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.
IRST representations, usage and related time zones
- +0330 - basic
- +03:30 - extended
- +0330 - sign character (+) followed by a four digit time providing hours (03) and minutes (30) of the offset. Indicates an offset of three hours and thirty minutes to the east of the zero meridian.
Eastern Standard Time
Offset: EST is 5 hours behind Greenwich Mean Time (GMT).
Countries using this time zone: Bahamas, Canada, Haiti, Jamaica, Cayman Islands, Mexico, Panama, Turks & Caicos Is, United States
Principal Cities: The largest city in the EST time zone is New York City in the United States, with about 8.804 million people. Other major cities in this time zone include Toronto, Montréal, Philadelphia, Port-au-Prince.
French: HNE - Heure Normale de l'Est
Spanish: ET - Tiempo del Este, ET - Zona Sureste
Today the lighter areas are on UTC−4 (EDT).
Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Eastern Daylight Time (EDT).
End: Eastern Standard Time (EST) ended on Sunday, March 8, 2026 at 2:00 am02:00 local time and clocks were set one hour forward to Sunday, March 8, 2026, 3:00 am03:00 local daylight time instead. Standard time ends annually on the second Sunday of March.
Start: Eastern Standard Time (EST) starts on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks are set one hour back to Sunday, November 1, 2026, 1:00 am01:00. Standard time starts annually on the first Sunday of November.
EST representations, usage and related time zones
- -05 - basic short
- -0500 - basic
- -05:00 - extended
- -0500 - sign character (-) followed by a four digit time providing hours (05) and minutes (00) of the offset. Indicates an offset of five hours to the west of the zero meridian.
- Romeo - Military abbreviation for EST
- R - short form of 'Romeo'
- America/Atikokan
- America/Cancun
- America/Cayman
- America/Coral_Harbour
- America/Detroit
- America/Fort_Wayne
- America/Grand_Turk
- America/Indiana/Indianapolis
- America/Indiana/Marengo
- America/Indiana/Petersburg
- America/Indiana/Vevay
- America/Indiana/Vincennes
- America/Indiana/Winamac
- America/Indianapolis
- America/Iqaluit
- America/Jamaica
- America/Kentucky/Louisville
- America/Kentucky/Monticello
- America/Louisville
- America/Montreal
- America/Nassau
- America/New_York
- America/Nipigon
- America/Panama
- America/Pangnirtung
- America/Port-au-Prince
- America/Thunder_Bay
- America/Toronto
- Canada/Eastern
- EST
- EST5EDT
- Jamaica
- US/East-Indiana
- US/Eastern
- US/Michigan
- CDT - Central Daylight Time
- EST - Eastern Standard Time
- ET - Eastern Time
- COT - Colombia Time
- CST - Cuba Standard Time
- EASST - Easter Island Summer Time
- ECT - Ecuador Time
- PET - Peru Time
- R - Romeo Time Zone