PST
Pacific Standard Time
GMT -8
HST (Hawaii Standard Time)
GMT -10
CST (Central Standard Time)
GMT -6
EST (Eastern Standard Time)
GMT -5
SGT
Singapore Time
GMT +8
WAT (West Africa Time)
GMT +1
GMT (Greenwich Mean Time)
GMT +0
IST
India Standard Time
GMT +5:30
KST (Korea Standard Time)
GMT +9

Time Difference

Pacific Standard Time is 2 hours ahead of HST (Hawaii Standard Time) and 2 hours behind of CST (Central Standard Time) and 3 hours behind of EST (Eastern Standard Time) and 16 hours behind of Singapore Time and 9 hours behind of WAT (West Africa Time) and 8 hours behind of GMT (Greenwich Mean Time) and 11 hours behind of and 13 hours and 30 minutes behind of India Standard Time and 17 hours behind of KST (Korea Standard Time)
So 9:30 pm21:30 in PST is 7:30 pm19:30 in Honolulu, Hawaii, USA and is 11:30 pm23:30 in Dallas, Texas, USA and is 12:30 am00:30 in Boston, Massachusetts, USA and is 1:30 pm13:30 in SGT and is 6:30 am06:30 in Lagos, Nigeria and is 5:30 am05:30 in London, United Kingdom and is 8:30 am08:30 in Mecca, Saudi Arabia and is 11:00 am11:00 in IST and is 2:30 pm14:30 in Seoul, South Korea

9:30 pm21:30 Pacific Standard Time (PST). Offset UTC -8:00 hours
7:30 pm19:30 HST (Hawaii Standard Time) (Honolulu, Hawaii, USA). Offset UTC -10:00 hours
11:30 pm23:30 CST (Central Standard Time) (Dallas, Texas, USA). Offset UTC -6:00 hours
12:30 am00:30 EST (Eastern Standard Time) (Boston, Massachusetts, USA). Offset UTC -5:00 hours
1:30 pm13:30 Singapore Time (SGT). Offset UTC +8:00 hours
6:30 am06:30 WAT (West Africa Time) (Lagos, Nigeria). Offset UTC +1:00 hour
5:30 am05:30 GMT (Greenwich Mean Time) (London, United Kingdom). Offset UTC 0:00 hours
8:30 am08:30 (Mecca, Saudi Arabia). Offset UTC +3:00 hours
11:00 am11:00 India Standard Time (IST). Offset UTC +5:30 hours
2:30 pm14:30 KST (Korea Standard Time) (Seoul, South Korea). Offset UTC +9:00 hours

9:30 pm21:30 PST / 7:30 pm19:30 Honolulu, Hawaii, USA / 11:30 pm23:30 Dallas, Texas, USA / 12:30 am00:30 Boston, Massachusetts, USA / 1:30 pm13:30 SGT / 6:30 am06:30 Lagos, Nigeria / 5:30 am05:30 London, United Kingdom / 8:30 am08:30 Mecca, Saudi Arabia / 11:00 am11:00 IST / 2:30 pm14:30 Seoul, South Korea

PST Honolulu, Hawaii, USA Dallas, Texas, USA Boston, Massachusetts, USA SGT Lagos, Nigeria London, United Kingdom Mecca, Saudi Arabia IST Seoul, South Korea
12am (midnight) 10pm 2am 3am 4pm 9am 8am 11am 1:30 pm 5pm
1am 11pm 3am 4am 5pm 10am 9am 12pm (noon) 2:30 pm 6pm
2am 12am (midnight) 4am 5am 6pm 11am 10am 1pm 3:30 pm 7pm
3am 1am 5am 6am 7pm 12pm (noon) 11am 2pm 4:30 pm 8pm
4am 2am 6am 7am 8pm 1pm 12pm (noon) 3pm 5:30 pm 9pm
5am 3am 7am 8am 9pm 2pm 1pm 4pm 6:30 pm 10pm
6am 4am 8am 9am 10pm 3pm 2pm 5pm 7:30 pm 11pm
7am 5am 9am 10am 11pm 4pm 3pm 6pm 8:30 pm 12am (midnight)
8am 6am 10am 11am 12am (midnight) 5pm 4pm 7pm 9:30 pm 1am
9am 7am 11am 12pm (noon) 1am 6pm 5pm 8pm 10:30 pm 2am
10am 8am 12pm (noon) 1pm 2am 7pm 6pm 9pm 11:30 pm 3am
11am 9am 1pm 2pm 3am 8pm 7pm 10pm 12:30 am 4am
12pm (noon) 10am 2pm 3pm 4am 9pm 8pm 11pm 1:30 am 5am
1pm 11am 3pm 4pm 5am 10pm 9pm 12am (midnight) 2:30 am 6am
2pm 12pm (noon) 4pm 5pm 6am 11pm 10pm 1am 3:30 am 7am
3pm 1pm 5pm 6pm 7am 12am (midnight) 11pm 2am 4:30 am 8am
4pm 2pm 6pm 7pm 8am 1am 12am (midnight) 3am 5:30 am 9am
5pm 3pm 7pm 8pm 9am 2am 1am 4am 6:30 am 10am
6pm 4pm 8pm 9pm 10am 3am 2am 5am 7:30 am 11am
7pm 5pm 9pm 10pm 11am 4am 3am 6am 8:30 am 12pm (noon)
8pm 6pm 10pm 11pm 12pm (noon) 5am 4am 7am 9:30 am 1pm
9pm 7pm 11pm 12am (midnight) 1pm 6am 5am 8am 10:30 am 2pm
10pm 8pm 12am (midnight) 1am 2pm 7am 6am 9am 11:30 am 3pm
11pm 9pm 1am 2am 3pm 8am 7am 10am 12:30 pm 4pm
0:00 22:00 2:00 3:00 16:00 9:00 8:00 11:00 13:30 17:00
1:00 23:00 3:00 4:00 17:00 10:00 9:00 12:00 14:30 18:00
2:00 0:00 4:00 5:00 18:00 11:00 10:00 13:00 15:30 19:00
3:00 1:00 5:00 6:00 19:00 12:00 11:00 14:00 16:30 20:00
4:00 2:00 6:00 7:00 20:00 13:00 12:00 15:00 17:30 21:00
5:00 3:00 7:00 8:00 21:00 14:00 13:00 16:00 18:30 22:00
6:00 4:00 8:00 9:00 22:00 15:00 14:00 17:00 19:30 23:00
7:00 5:00 9:00 10:00 23:00 16:00 15:00 18:00 20:30 0:00
8:00 6:00 10:00 11:00 0:00 17:00 16:00 19:00 21:30 1:00
9:00 7:00 11:00 12:00 1:00 18:00 17:00 20:00 22:30 2:00
10:00 8:00 12:00 13:00 2:00 19:00 18:00 21:00 23:30 3:00
11:00 9:00 13:00 14:00 3:00 20:00 19:00 22:00 0:30 4:00
12:00 10:00 14:00 15:00 4:00 21:00 20:00 23:00 1:30 5:00
13:00 11:00 15:00 16:00 5:00 22:00 21:00 0:00 2:30 6:00
14:00 12:00 16:00 17:00 6:00 23:00 22:00 1:00 3:30 7:00
15:00 13:00 17:00 18:00 7:00 0:00 23:00 2:00 4:30 8:00
16:00 14:00 18:00 19:00 8:00 1:00 0:00 3:00 5:30 9:00
17:00 15:00 19:00 20:00 9:00 2:00 1:00 4:00 6:30 10:00
18:00 16:00 20:00 21:00 10:00 3:00 2:00 5:00 7:30 11:00
19:00 17:00 21:00 22:00 11:00 4:00 3:00 6:00 8:30 12:00
20:00 18:00 22:00 23:00 12:00 5:00 4:00 7:00 9:30 13:00
21:00 19:00 23:00 0:00 13:00 6:00 5:00 8:00 10:30 14:00
22:00 20:00 0:00 1:00 14:00 7:00 6:00 9:00 11:30 15:00
23:00 21:00 1:00 2:00 15:00 8:00 7:00 10:00 12:30 16:00

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 switch clocks for one hour forward when daylight saving comes into effect and observe Pacific Daylight Time (PDT).

Start: PST starts annually on the same date and time. and clocks were set one hour back on Sunday, November 3, 2019, at 2:00 (2:00 am) local time.

End: PST ends annually on the same date and time. and clocks are set one hour forward on Sunday, March 8, 2020, 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
  • 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
  • Pitcairn Standard Time - UTC -8

Time zones with the GMT -8 offset:

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


HST (Hawaii Standard Time)

Offset: HST is 10 hours behind Greenwich Mean Time (GMT) and is used in Pacific

Countries: It is used in following countries: United States

Principal Cities: The largest city in the HST timezone is Honolulu from USA with population about 371657 people. Other major cities in the area are Pearl City, Hilo, Kailua, Waipahu

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 Hawaii Daylight Time (HDT).

Start: HST started and clocks were set one hour back on Sunday, November 3, 2019, at 2:00 (2:00 am) local time.

End: HST ends and clocks are set one hour forward on Sunday, March 8, 2020, at 2:00 (2:00 am) local time.

Honolulu, Hawaii, USA Time Zone Geo Map
Honolulu, Hawaii, USA timezone map
Honolulu, Hawaii, USA representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -10 - basic short
  • -1000 - basic
  • -10:00 - extended

Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -1000 - sign character (-) followed by a four digit time providing hours (10) and minutes (00) of the offset. Indicates ten 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
  • Whiskey - Military abbreviation for HST
  • W - short form of 'Whiskey'

IANA/Olson: Reflects HST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Adak
  • America/Atka
  • HST
  • Pacific/Honolulu
  • Pacific/Johnston
  • US/Aleutian
  • US/Hawaii

Time zones with the GMT -10 offset:

  • HAST - Hawaii-Aleutian Standard Time
  • CKT - Cook Island Time
  • HST - Hawaii Standard Time
  • TAHT - Tahiti Time
  • W - Whiskey Time Zone


CST (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 switch clocks for one hour forward when daylight saving comes into effect and observe Central Daylight Time (CDT).

Start: CST starts annually on the same date and time. and clocks were set one hour back on Sunday, November 3, 2019, at 2:00 (2:00 am) local time.

End: CST ends annually on the same date and time. and clocks are set one hour forward on Sunday, March 8, 2020, at 2:00 (2:00 am) local time.

French: HNC - Heure Normale du Centre

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

Dallas, Texas, USA Time Zone Geo Map
Dallas, Texas, USA timezone map
Dallas, Texas, USA 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/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/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
  • China Standard Time - UTC +8
  • Cuba Standard Time - UTC -5

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
  • -06 -


EST (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 switch clocks for one hour forward when daylight saving comes into effect and observe Eastern Daylight Time (EDT).

Start: EST starts annually on the same date and time. and clocks were set one hour back on Sunday, November 3, 2019, at 2:00 (2:00 am) local time.

End: EST ends annually on the same date and time. and clocks are set one hour forward on Sunday, March 8, 2020, at 2:00 (2:00 am) local time.

French: HNE - Heure Normale de l'Est

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

Boston, Massachusetts, USA Time Zone Geo Map
Boston, Massachusetts, USA timezone map
Boston, Massachusetts, USA 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
  • -05 -


WAT (West Africa Time)

Offset: WAT is 1 hour ahead Greenwich Mean Time (GMT) and is used in Africa

Countries: It is used in following countries: Angola, Benin, Congo (Dem. Rep.), Central African Rep., Congo (Rep.), Cameroon, Gabon, Equatorial Guinea, Niger, Nigeria, Sao Tome & Principe, Chad

Principal Cities: The largest city in the WAT timezone is Lagos from Nigeria with population about 9 million people. Other major cities in the area are Kinshasa, Kano, Ibadan, Luanda

Greenwich Mean Time (GMT) originally referred to the mean solar time at the Royal Observatory in Greenwich, London. It is now often used to refer to Coordinated Universal Time (UTC) when this is viewed as a time zone, and in casual use for the most parts it is the same. In military GMT is known as Zulu time.Greenwich Mean Time was the same as Universal Time (UT), until the introduction of UTC in 1972 a standard astronomical concept used in many technical fields.

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

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +01 - basic short
  • +0100 - basic
  • +01:00 - extended

Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0100 - sign character (+) followed by a four digit time providing hours (01) and minutes (00) of the offset. Indicates one 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
  • Alpha - Military abbreviation for WAT
  • A - short form of 'Alpha'

IANA/Olson: Reflects WAT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Africa/Bangui
  • Africa/Brazzaville
  • Africa/Douala
  • Africa/Kinshasa
  • Africa/Lagos
  • Africa/Libreville
  • Africa/Luanda
  • Africa/Malabo
  • Africa/Ndjamena
  • Africa/Niamey
  • Africa/Porto-Novo

Time zones with the GMT +1 offset:

  • BST - British Summer Time
  • CET - Central European Time
  • IST - Irish Standard Time
  • WEST - Western European Summer Time
  • A - Alpha Time Zone
  • CET - Central European Time
  • MEZ - Mitteleuropäische Zeit
  • WAT - West Africa Time
  • WST - Western Sahara Summer Time
  • BMT - Biel Mean Time
  • +01 -


GMT (Greenwich Mean Time)

Offset: GMT is 0 hours ahead Greenwich Mean Time (GMT) and is used in Europe

Countries: It is used in following countries: Burkina Faso, Côte d'Ivoire, Britain (UK), Guernsey, Ghana, Greenland, Gambia, Guinea, Guinea-Bissau, Ireland, Isle of Man, Iceland, Jersey, Liberia, Mali, Mauritania, St Helena, Sierra Leone, Senegal, Sao Tome & Principe, Togo

Principal Cities: The largest city in the GMT timezone is London from United Kingdom with population about 7.557 million people. Other major cities in the area are Abidjan, Dakar, Grand Dakar, Accra

Greenwich Mean Time (GMT) originally referred to the mean solar time at the Royal Observatory in Greenwich, London. It is now often used to refer to Coordinated Universal Time (UTC) when this is viewed as a time zone, and in casual use for the most parts it is the same. In military GMT is known as Zulu time.Greenwich Mean Time was the same as Universal Time (UT), until the introduction of UTC in 1972 a standard astronomical concept used in many technical fields.

London, United Kingdom Time Zone Geo Map
London, United Kingdom timezone map
London, United Kingdom representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • Z - is the zone designator for the zero UTC/GMT offset, also known as 'Zulu' time
  • +00 - basic short
  • +0000 - basic
  • +00:00 - extended

Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0000 - sign character (+) followed by a four digit time providing hours (00) and minutes (00) of the offset. Indicates zero hour and zero minutes time differences of the zero meridian.

Military/NATO: Used by the U.S. military, Chinese military and others
  • Zulu - Military abbreviation for GMT
  • Z - short form of 'Zulu'

IANA/Olson: Reflects GMT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Africa/Abidjan
  • Africa/Accra
  • Africa/Bamako
  • Africa/Banjul
  • Africa/Bissau
  • Africa/Conakry
  • Africa/Dakar
  • Africa/Freetown
  • Africa/Lome
  • Africa/Monrovia
  • Africa/Nouakchott
  • Africa/Ouagadougou
  • Africa/Sao_Tome
  • Africa/Timbuktu
  • America/Danmarkshavn
  • Atlantic/Reykjavik
  • Atlantic/St_Helena
  • Eire
  • Etc/GMT
  • Etc/GMT+0
  • Etc/GMT-0
  • Etc/GMT0
  • Etc/Greenwich
  • Europe/Belfast
  • Europe/Dublin
  • Europe/Guernsey
  • Europe/Isle_of_Man
  • Europe/Jersey
  • Europe/London
  • GB
  • GB-Eire
  • GMT
  • GMT+0
  • GMT-0
  • GMT0
  • Greenwich
  • Iceland

Time zones with the GMT +0 offset:

  • EGST - Eastern Greenland Summer Time
  • GMT - Greenwich Mean Time
  • WET - Western European Time
  • AZOST - Azores Summer Time
  • UTC - Universal Time Coordinated
  • WT - Western Sahara Standard Time
  • Z - Zulu Time Zone
  • +00 -


Mecca, Saudi Arabia

Offset: +03 is 3 hours ahead Greenwich Mean Time (GMT) and is used in Asia

Countries: It is used in following countries: Antarctica, Bahrain, Belarus, Iraq, Kuwait, Qatar, Russia, Saudi Arabia, Turkey, Yemen

Principal Cities: The largest city in the +03 timezone is Istanbul from Turkey with population about 11.174 million people. Other major cities in the area are Baghdad, Riyadh, Ankara, Jeddah

Mecca, Saudi Arabia representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +03 - basic short
  • +0300 - basic
  • +03:00 - extended

Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0300 - sign character (+) followed by a four digit time providing hours (03) and minutes (00) of the offset. Indicates three 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
  • Charlie - Military abbreviation for +03
  • C - short form of 'Charlie'

IANA/Olson: Reflects +03 time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Antarctica/Syowa
  • Asia/Aden
  • Asia/Baghdad
  • Asia/Bahrain
  • Asia/Istanbul
  • Asia/Kuwait
  • Asia/Qatar
  • Asia/Riyadh
  • Etc/GMT-3
  • Europe/Istanbul
  • Europe/Kirov
  • Europe/Minsk
  • Turkey

Time zones with the GMT +3 offset:

  • EEST - Eastern European Summer Time
  • MSK - Moscow Standard Time
  • AST - Arabia Standard Time
  • C - Charlie Time Zone
  • EAT - Eastern Africa Time
  • FET - Further Eastern European Time
  • IDT - Israel Daylight Time
  • TRT - Turkey Time
  • +03 -


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


KST (Korea Standard Time)

Offset: KST is 9 hours ahead Greenwich Mean Time (GMT) and is used in Asia

Countries: It is used in following countries: Korea (North), Korea (South)

Principal Cities: The largest city in the KST timezone is Seoul from South Korea with population about 10.349 million people. Other major cities in the area are Busan, Pyongyang, Incheon, Daegu

Daylight Saving: Korea Standard Time (KST) is not adjusted for daylight saving therefore KST 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, Korea Standard Time remains the same

Seoul, South Korea Time Zone Geo Map
Seoul, South Korea timezone map
Seoul, South Korea 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 KST
  • I - short form of 'India'

IANA/Olson: Reflects KST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Asia/Pyongyang
  • Asia/Seoul
  • ROK

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

  • Korea Standard Time - UTC +9
  • Pyongyang Time - UTC +8:30

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
  • +09 -