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EST to IST to I

EDT/EST
Eastern Daylight Time
GMT -4
EST automatically adjusted to EDT time zone, that is in use
IST
India Standard Time
GMT +5:30
I
India Time Zone
GMT +9

Time Difference

Eastern Daylight Time is 9 hours and 30 minutes behind India Standard Time and 13 hours behind India Time Zone
3:00 pm15:00 in EDT is 12:30 am00:30 in IST and is 4:00 am04:00 in I

EST to IST call time
Best time for a conference call or a meeting is between 7:30am-9:30am in EST which corresponds to 6pm-8pm in IST
EST to I call time
Best time for a conference call or a meeting is between 6am-8am in EST which corresponds to 8pm-10pm in I

3:00 pm15:00 Eastern Daylight Time (EDT). Offset UTC -4:00 hours
12:30 am00:30 India Standard Time (IST). Offset UTC +5:30 hours
4:00 am04:00 India Time Zone (I). Offset UTC +9:00 hours

3:00 pm15:00 EDT / 12:30 am00:30 IST / 4:00 am04:00 I

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

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 time zone, 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 forward for one hour from 2am to 3amEnd: Eastern Standard Time (EST) has ended on Sunday, March 9, 2025 at 2:00 am local time and clocks were set one hour forward to Sunday, March 9, 2025, 3:00 am local daylight time instead. Standard time ends annually the on second Sunday of March.

Daylight saving time clock moves back for one hour from 2am to 1amStart: Eastern Standard Time (EST) starts on Sunday, November 2, 2025 at 2:00 am local time and clocks are set one hour back to Sunday, November 2, 2025, 1:00 am. Standard time starts annually the on first Sunday of November.

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

India Standard Time

Offset: IST is 5 hours and 30 minutes ahead Greenwich Mean Time (GMT) and is used in Asia

Countries: It is used in following countries: India

Principal Cities: The largest city in the IST timezone is Mumbai from India with population about 12.692 million people. Other major cities in the area are Delhi, Bangalore, Kolkata, Chennai

Daylight Saving: India Standard Time (IST) is not adjusted for daylight saving therefore IST remains the same through out the year. This means, unlike some time zones where the clock is set forward by one hour every summer and backward by one hour during winter to adjust for daylight saving, India Standard Time remains the same

IST Time Zone Geo Map
IST timezone map

IST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +0530 - basic
  • +05:30 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0530 - sign character (+) followed by a four digit time providing hours (05) and minutes (30) of the offset. Indicates five hour and thirty minutes time differences to the east of the zero meridian.
IANA/Olson: Reflects IST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Asia/Calcutta
  • Asia/Kolkata
IST Abbreviation: Several time zones share IST abbreviation and it could refer to these time zones
  • India Standard Time - UTC +5:30
  • Irish Standard Time - UTC +1
  • Israel Standard Time - UTC +2
  • Iran Standard Time - UTC +3:30

India Time Zone

Offset: I is 9 hours ahead Greenwich Mean Time (GMT) and is used in Military

I representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +09 - basic short
  • +0900 - basic
  • +09:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0900 - sign character (+) followed by a four digit time providing hours (09) and minutes (00) of the offset. Indicates nine hour and zero minutes time differences to the east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • India - Military abbreviation for I
  • I - short form of 'India'
Time zones with the GMT +9 offset:
  • AWDT - Australian Western Daylight Time
  • CHOST - Choibalsan Summer Time
  • I - India Time Zone
  • IRKST - Irkutsk Summer Time
  • JST - Japan Standard Time
  • KST - Korea Standard Time
  • PWT - Palau Time
  • TLT - East Timor Time
  • ULAST - Ulaanbaatar Summer Time
  • WIT - Eastern Indonesian Time
  • YAKT - Yakutsk Time
EST to IST GMT to EST PST to EST EST to GMT PST to GMT