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IST
India Standard Time
GMT +5:30 h
EDT/EST
Eastern Daylight Time
GMT -4:00 h
EST automatically adjusted to EDT time zone, that is in use
CDT/CST
Central Daylight Time
GMT -5:00 h
CST automatically adjusted to CDT time zone, that is in use
MDT/MST
Mountain Daylight Time
GMT -6:00 h
MST automatically adjusted to MDT time zone, that is in use
PDT/PST
Pacific Daylight Time
GMT -7:00 h
PST automatically adjusted to PDT time zone, that is in use

Time Difference

India Standard Time is 9 hours and 30 minutes ahead of Eastern Daylight Time and 10 hours and 30 minutes ahead of Central Daylight Time and 11 hours and 30 minutes ahead of Mountain Daylight Time and 12 hours and 30 minutes ahead of Pacific Daylight Time
So 7:00 AM07:00 in IST is 9:30 PM21:30 in EDT and is 8:30 PM20:30 in CDT and is 7:30 PM19:30 in MDT and is 6:30 PM18:30 in PDT

7:00 AM07:00 India Standard Time (IST). Offset UTC +5:30 hours
9:30 PM21:30 Eastern Daylight Time (EDT). Offset UTC -4:00 hours
8:30 PM20:30 Central Daylight Time (CDT). Offset UTC -5:00 hours
7:30 PM19:30 Mountain Daylight Time (MDT). Offset UTC -6:00 hours
6:30 PM18:30 Pacific Daylight Time (PDT). Offset UTC -7:00 hours

7:00 AM07:00 IST / 9:30 PM21:30 EDT / 8:30 PM20:30 CDT / 7:30 PM19:30 MDT / 6:30 PM18:30 PDT

IST EDT CDT MDT PDT
12am (midnight) 2:30 pm 1:30 pm 12:30 pm 11:30 am
1am 3:30 pm 2:30 pm 1:30 pm 12:30 pm
2am 4:30 pm 3:30 pm 2:30 pm 1:30 pm
3am 5:30 pm 4:30 pm 3:30 pm 2:30 pm
4am 6:30 pm 5:30 pm 4:30 pm 3:30 pm
5am 7:30 pm 6:30 pm 5:30 pm 4:30 pm
6am 8:30 pm 7:30 pm 6:30 pm 5:30 pm
7am 9:30 pm 8:30 pm 7:30 pm 6:30 pm
8am 10:30 pm 9:30 pm 8:30 pm 7:30 pm
9am 11:30 pm 10:30 pm 9:30 pm 8:30 pm
10am 12:30 am 11:30 pm 10:30 pm 9:30 pm
11am 1:30 am 12:30 am 11:30 pm 10:30 pm
12pm (noon) 2:30 am 1:30 am 12:30 am 11:30 pm
1pm 3:30 am 2:30 am 1:30 am 12:30 am
2pm 4:30 am 3:30 am 2:30 am 1:30 am
3pm 5:30 am 4:30 am 3:30 am 2:30 am
4pm 6:30 am 5:30 am 4:30 am 3:30 am
5pm 7:30 am 6:30 am 5:30 am 4:30 am
6pm 8:30 am 7:30 am 6:30 am 5:30 am
7pm 9:30 am 8:30 am 7:30 am 6:30 am
8pm 10:30 am 9:30 am 8:30 am 7:30 am
9pm 11:30 am 10:30 am 9:30 am 8:30 am
10pm 12:30 pm 11:30 am 10:30 am 9:30 am
11pm 1:30 pm 12:30 pm 11:30 am 10:30 am
0:00 14:30 13:30 12:30 11:30
1:00 15:30 14:30 13:30 12:30
2:00 16:30 15:30 14:30 13:30
3:00 17:30 16:30 15:30 14:30
4:00 18:30 17:30 16:30 15:30
5:00 19:30 18:30 17:30 16:30
6:00 20:30 19:30 18:30 17:30
7:00 21:30 20:30 19:30 18:30
8:00 22:30 21:30 20:30 19:30
9:00 23:30 22:30 21:30 20:30
10:00 0:30 23:30 22:30 21:30
11:00 1:30 0:30 23:30 22:30
12:00 2:30 1:30 0:30 23:30
13:00 3:30 2:30 1:30 0:30
14:00 4:30 3:30 2:30 1:30
15:00 5:30 4:30 3:30 2:30
16:00 6:30 5:30 4:30 3:30
17:00 7:30 6:30 5:30 4:30
18:00 8:30 7:30 6:30 5:30
19:00 9:30 8:30 7:30 6:30
20:00 10:30 9:30 8:30 7:30
21:00 11:30 10:30 9:30 8:30
22:00 12:30 11:30 10:30 9:30
23:00 13:30 12:30 11:30 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/Colombo
  • Asia/Kolkata

IST Abbreviation: Several time zones share IST abbreviation and it could refer to these time zones

  • India Standard Time - UTC +5:30 h
  • Irish Standard Time - UTC +1:00 h
  • Israel Standard Time - UTC +2:00 h


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

Daylight Saving: This is a standard timezone, however during summer some places adjust time for one hour forward for daylight saving and observe Eastern Daylight Time (EDT).

End: EST ends annually the Second Sunday of March at 2:00 AM local time and clocks were set one hour forward on Sunday, March 11, 2018, at 2:00 (2:00 am) local time.

Start: EST starts annually the First Sunday of November at 2:00 AM local time and clocks are set one hour back on Sunday, November 4, 2018, at 2:00 (2:00 am) local time.

French: HNE - Heure Normale de l'Est

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

EST Time Zone Geo Map
EST timezone map
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/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 -5:00 h 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
  • -05 -


Central Standard Time

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

Countries: It is used in following countries: Belize, Canada, Costa Rica, Guatemala, Honduras, Mexico, Nicaragua, El Salvador, United States

Principal Cities: The largest city in the CST timezone is Mexico City from Mexico with population about 12.294 million people. Other major cities in the area are Chicago, Houston, Iztapalapa, Ecatepec

Daylight Saving: This is a standard timezone, however during summer some places adjust time for one hour forward for daylight saving and observe Central Daylight Time (CDT).

End: CST ends annually the Second Sunday of March at 2:00 AM local time and clocks were set one hour forward on Sunday, March 11, 2018, at 2:00 (2:00 am) local time.

Start: CST starts annually the First Sunday of November at 2:00 AM local time and clocks are set one hour back on Sunday, November 4, 2018, at 2:00 (2:00 am) local time.

French: HNC - Heure Normale du Centre

Spanish: CT - Tiempo Central Estándar, CT - Zona Centro

CST Time Zone Geo Map
CST timezone map
CST 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 CST
  • S - short form of 'Sierra'

IANA/Olson: Reflects CST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Bahia_Banderas
  • America/Belize
  • America/Cancun
  • America/Chicago
  • America/Costa_Rica
  • America/El_Salvador
  • America/Guatemala
  • America/Indiana/Knox
  • America/Indiana/Tell_City
  • America/Knox_IN
  • America/Managua
  • America/Matamoros
  • America/Menominee
  • America/Merida
  • America/Mexico_City
  • America/Monterrey
  • America/North_Dakota/Beulah
  • America/North_Dakota/Center
  • America/North_Dakota/New_Salem
  • America/Rainy_River
  • America/Rankin_Inlet
  • America/Regina
  • America/Resolute
  • America/Swift_Current
  • America/Tegucigalpa
  • America/Winnipeg
  • CST6CDT
  • Canada/Central
  • Canada/East-Saskatchewan
  • Canada/Saskatchewan
  • Mexico/General
  • US/Central
  • US/Indiana-Starke

CST Abbreviation: Several time zones share CST abbreviation and it could refer to these time zones

  • Central Standard Time - UTC -6:00 h
  • China Standard Time - UTC +8:00 h
  • Cuba Standard Time - UTC -5:00 h

Time zones with the GMT -6:00 h offset:

  • CST - Central Standard Time
  • CT - Central Time
  • MDT - Mountain Daylight Time
  • EAST - Easter Island Standard Time
  • GALT - Galapagos Time
  • S - Sierra Time Zone
  • -06 -


Mountain Standard Time

Offset: MST is 7 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 MST timezone is Ciudad Juarez from Mexico with population about 1.512 million people. Other major cities in the area are Phoenix, Calgary, Chihuahua, Edmonton

Daylight Saving: This is a standard timezone, however during summer some places adjust time for one hour forward for daylight saving and observe Mountain Daylight Time (MDT).

End: MST ends annually the Second Sunday of March at 2:00 AM local time and clocks were set one hour forward on Sunday, March 11, 2018, at 2:00 (2:00 am) local time.

Start: MST starts annually the First Sunday of November at 2:00 AM local time and clocks are set one hour back on Sunday, November 4, 2018, at 2:00 (2:00 am) local time.

French: HNR - Heure Normale des Rocheuses

Spanish: MT - Zona Pacífico

MST Time Zone Geo Map
MST timezone map
MST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -07 - basic short
  • -0700 - basic
  • -07:00 - extended

Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0700 - sign character (-) followed by a four digit time providing hours (07) and minutes (00) of the offset. Indicates seven 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
  • Tango - Military abbreviation for MST
  • T - short form of 'Tango'

IANA/Olson: Reflects MST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Boise
  • America/Cambridge_Bay
  • America/Chihuahua
  • America/Creston
  • America/Dawson_Creek
  • America/Denver
  • America/Edmonton
  • America/Hermosillo
  • America/Inuvik
  • America/Mazatlan
  • America/Ojinaga
  • America/Phoenix
  • America/Shiprock
  • America/Yellowknife
  • Canada/Mountain
  • MST
  • MST7MDT
  • Mexico/BajaSur
  • Navajo
  • US/Arizona
  • US/Mountain

Time zones with the GMT -7:00 h offset:

  • MST - Mountain Standard Time
  • PDT - Pacific Daylight Time
  • T - Tango Time Zone


Pacific Standard Time

Offset: PST is 8 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 PST timezone is Los Angeles from USA with population about 3.793 million people. Other major cities in the area are Vancouver, Tijuana, San Diego, San Jose

Daylight Saving: This is a standard timezone, however during summer some places adjust time for one hour forward for daylight saving and observe Pacific Daylight Time (PDT).

End: PST ends annually the Second Sunday of March at 2:00 AM local time and clocks were set one hour forward on Sunday, March 11, 2018, at 2:00 (2:00 am) local time.

Start: PST starts annually the First Sunday of November at 2:00 AM local time and clocks are set one hour back on Sunday, November 4, 2018, at 2:00 (2:00 am) local time.

French: HNP - Heure Normale du Pacifique

Spanish: PT - Tiempo del Pacífico, PT - Zona Noroeste

PST Time Zone Geo Map
PST timezone map
PST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -08 - basic short
  • -0800 - basic
  • -08:00 - extended

Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0800 - sign character (-) followed by a four digit time providing hours (08) and minutes (00) of the offset. Indicates eight 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
  • Uniform - Military abbreviation for PST
  • U - short form of 'Uniform'

IANA/Olson: Reflects PST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Dawson
  • America/Ensenada
  • America/Los_Angeles
  • America/Santa_Isabel
  • America/Tijuana
  • America/Vancouver
  • America/Whitehorse
  • Canada/Pacific
  • Canada/Yukon
  • Mexico/BajaNorte
  • PST8PDT
  • Pacific/Pitcairn
  • US/Pacific
  • US/Pacific-New

PST Abbreviation: Several time zones share PST abbreviation and it could refer to these time zones

  • Pacific Standard Time - UTC -8:00 h
  • Pitcairn Standard Time - UTC -8:00 h

Time zones with the GMT -8:00 h offset:

  • AKDT - Alaska Daylight Time
  • PST - Pacific Standard Time
  • PT - Pacific Time
  • YDT - Yukon Daylight Time
  • PST - Pitcairn Standard Time
  • U - Uniform Time Zone