EST
Eastern Standard Time
GMT -5
IRDT
Iran Daylight Time
GMT +4:30

Time Difference

Eastern Standard Time is 9 hours and 30 minutes behind Iran Daylight Time
4:00 pm16:00 in EST is 1:30 am01:30 in IRDT

EST to IRDT call time
Best time for a conference call or a meeting is between 8am-10am in EST which corresponds to 5:30pm-7:30pm in IRDT

4:00 pm16:00 Eastern Standard Time (EST). Offset UTC -5:00 hours
1:30 am01:30 Iran Daylight Time (IRDT). Offset UTC +4:30 hours

4:00 pm16:00 EST / 1:30 am01:30 IRDT

EST IRDT
12am (midnight) 9:30 am
1am 10:30 am
2am 11:30 am
3am 12:30 pm
4am 1:30 pm
5am 2:30 pm
6am 3:30 pm
7am 4:30 pm
8am 5:30 pm
9am 6:30 pm
10am 7:30 pm
11am 8:30 pm
12pm (noon) 9:30 pm
1pm 10:30 pm
2pm 11:30 pm
3pm 12:30 am
4pm 1:30 am
5pm 2:30 am
6pm 3:30 am
7pm 4:30 am
8pm 5:30 am
9pm 6:30 am
10pm 7:30 am
11pm 8:30 am
0:00 9:30
1:00 10:30
2:00 11:30
3:00 12:30
4:00 13:30
5:00 14:30
6:00 15:30
7:00 16:30
8:00 17:30
9:00 18:30
10:00 19:30
11:00 20:30
12:00 21:30
13:00 22:30
14:00 23:30
15:00 0:30
16:00 1:30
17:00 2:30
18:00 3:30
19:00 4:30
20:00 5:30
21:00 6:30
22:00 7:30
23:00 8:30

Eastern Standard Time

Offset: EST is 5 hours behind Greenwich Mean Time (GMT) and is used in North America

Countries: It is used in following countries: Bahamas, Canada, Haiti, Jamaica, Cayman Islands, Mexico, Panama, Turks & Caicos Is, United States

Principal Cities: The largest city in the EST timezone is New York City from USA with population about 8.175 million people. Other major cities in the area are Toronto, Montreal, Brooklyn, Borough of Queens

French: HNE - Heure Normale de l'Est

Spanish: ET - Tiempo del Este, ET - Zona Sureste

EST Time Zone Geo Map
EST timezone map

Daylight Saving: This is a standard timezone, however during summer some places switch clocks for one hour forward when daylight saving comes into effect and observe Eastern Daylight Time (EDT).

Daylight saving time clock moves back for one hour from 2am to 1amStart: Eastern Standard Time (EST) started on Sunday, November 7, 2021 at 2:00 am local time and clocks were set one hour back to Sunday, November 7, 2021, 1:00 am. Standard time starts annually the on first Sunday of November.

Daylight saving time clock moves forward for one hour from 2am to 3amEnd: Eastern Standard Time (EST) ends on Sunday, March 13, 2022 at 2:00 am local time and clocks are set one hour forward to Sunday, March 13, 2022, 3:00 am local daylight time instead. Standard time starts annually the on second Sunday of March.

EST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -05 - basic short
  • -0500 - basic
  • -05:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0500 - sign character (-) followed by a four digit time providing hours (05) and minutes (00) of the offset. Indicates five hour and zero minutes time differences to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Romeo - Military abbreviation for EST
  • R - short form of 'Romeo'
IANA/Olson: Reflects EST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • 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
Time zones with the GMT -5 offset:
  • 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

Iran Daylight Time

Offset: IRDT is 4 hours and 30 minutes ahead Greenwich Mean Time (GMT) and is used in Asia

IRDT Time Zone Geo Map
IRDT timezone map

IRDT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +0430 - basic
  • +04:30 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0430 - sign character (+) followed by a four digit time providing hours (04) and minutes (30) of the offset. Indicates four hour and thirty minutes time differences to the east of the zero meridian.
Time zones with the GMT +4:30 offset:
  • AFT - Afghanistan Time
  • IRDT - Iran Daylight Time