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IST to EST to MDT

IST
India Standard Time
GMT +5:30
EST
Eastern Standard Time
GMT -5
MST/MDT
Mountain Standard Time
GMT -7
MDT automatically adjusted to MST time zone, that is in use

Time Difference

India Standard Time is 10 hours and 30 minutes ahead of Eastern Standard Time and 12 hours and 30 minutes ahead of Mountain Standard Time
2:00 am02:00 in IST is 3:30 pm15:30 in EST and is 1:30 pm13:30 in MST

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

2:00 am02:00 India Standard Time (IST). Offset UTC +5:30 hours
3:30 pm15:30 Eastern Standard Time (EST). Offset UTC -5:00 hours
1:30 pm13:30 Mountain Standard Time (MST). Offset UTC -7:00 hours

2:00 am02:00 IST / 3:30 pm15:30 EST / 1:30 pm13:30 MST

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

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

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 2, 2025 at 2:00 am local time and clocks were set one hour back to Sunday, November 2, 2025, 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 8, 2026 at 2:00 am local time and clocks are set one hour forward to Sunday, March 8, 2026, 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

Mountain Daylight Time

Offset: MDT is 6 hours behind Greenwich Mean Time (GMT) and is used in North America

Countries: It is used in following countries: Canada, Mexico, United States

Principal Cities: The largest city in the MDT timezone is Calgary from Canada with population about 1.02 million people. Other major cities in the area are Edmonton, El Paso, Denver, Albuquerque

French: HAR - Heure Avancée des Rocheuses

Spanish: MT - Zona Pacífico

MDT Time Zone Geo Map
MDT timezone map

Daylight Saving: Mountain Daylight Time (MDT) is a daylight saving/summer time zone, however during winter some places adjust time for one hour back and observe Mountain Standard Time (MST).

Daylight saving time clock moves back for one hour from 2am to 1amEnd: Mountain Daylight Time (MDT) has ended on Sunday, November 2, 2025 at 2:00 am local time and clocks were set one hour back to Sunday, November 2, 2025, 1:00 am local standard time instead. Daylight saving ends annually the on first Sunday of November

Daylight saving time clock moves forward for one hour from 2am to 3amStart: Mountain Daylight Time (MDT) starts on Sunday, March 8, 2026 at 2:00 am local time and clocks are set one hour forward to Sunday, March 8, 2026, 3:00 am. Daylight saving starts annually the on second Sunday of March

MDT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -06 - basic short
  • -0600 - basic
  • -06:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0600 - sign character (-) followed by a four digit time providing hours (06) and minutes (00) of the offset. Indicates six 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
  • Sierra - Military abbreviation for MDT
  • S - short form of 'Sierra'
IANA/Olson: Reflects MDT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Boise
  • America/Cambridge_Bay
  • America/Ciudad_Juarez
  • America/Denver
  • America/Edmonton
  • America/Inuvik
  • America/Shiprock
  • America/Yellowknife
  • Canada/Mountain
  • MST7MDT
  • Navajo
  • US/Mountain
Time zones with the GMT -6 offset:
  • CST - Central Standard Time
  • CT - Central Time
  • MDT - Mountain Daylight Time
  • EAST - Easter Island Standard Time
  • GALT - Galapagos Time
  • S - Sierra Time Zone
EST to IST GMT to EST PST to EST EST to GMT PST to GMT