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GMT
Greenwich Mean Time
GMT 0:00 h
AEST (Australian Eastern Standard Time)
GMT +10:00 h
EDT (Eastern Daylight Time)
GMT -4:00 h
PDT (Pacific Daylight Time)
GMT -7:00 h
BST (British Summer Time)
GMT +1:00 h
JST (Japan Standard Time)
GMT +9:00 h

Time Difference

Greenwich Mean Time is 10 hours behind of AEST (Australian Eastern Standard Time) and 4 hours ahead of EDT (Eastern Daylight Time) and 7 hours ahead of PDT (Pacific Daylight Time) and 1 hours behind of BST (British Summer Time) and 9 hours behind of JST (Japan Standard Time)
So 3:00 PM15:00 in GMT is 1:00 AM01:00 in Brisbane, Australia and is 11:00 AM11:00 in New York City, New York, USA and is 8:00 AM08:00 in Los Angeles, California, USA and is 4:00 PM16:00 in London, United Kingdom and is 12:00 AM00:00 in Tokyo, Japan

3:00 PM15:00 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
1:00 AM01:00 AEST (Australian Eastern Standard Time) (Brisbane, Australia). Offset UTC +10:00 hours
11:00 AM11:00 EDT (Eastern Daylight Time) (New York City, New York, USA). Offset UTC -4:00 hours
8:00 AM08:00 PDT (Pacific Daylight Time) (Los Angeles, California, USA). Offset UTC -7:00 hours
4:00 PM16:00 BST (British Summer Time) (London, United Kingdom). Offset UTC +1:00 hour
12:00 AM00:00 JST (Japan Standard Time) (Tokyo, Japan). Offset UTC +9:00 hours

3:00 PM15:00 GMT / 1:00 AM01:00 Brisbane, Australia / 11:00 AM11:00 New York City, New York, USA / 8:00 AM08:00 Los Angeles, California, USA / 4:00 PM16:00 London, United Kingdom / 12:00 AM00:00 Tokyo, Japan

GMT Brisbane, Australia New York City, New York, USA Los Angeles, California, USA London, United Kingdom Tokyo, Japan
12am (midnight) 10am 8pm 5pm 1am 9am
1am 11am 9pm 6pm 2am 10am
2am 12pm (noon) 10pm 7pm 3am 11am
3am 1pm 11pm 8pm 4am 12pm (noon)
4am 2pm 12am (midnight) 9pm 5am 1pm
5am 3pm 1am 10pm 6am 2pm
6am 4pm 2am 11pm 7am 3pm
7am 5pm 3am 12am (midnight) 8am 4pm
8am 6pm 4am 1am 9am 5pm
9am 7pm 5am 2am 10am 6pm
10am 8pm 6am 3am 11am 7pm
11am 9pm 7am 4am 12pm (noon) 8pm
12pm (noon) 10pm 8am 5am 1pm 9pm
1pm 11pm 9am 6am 2pm 10pm
2pm 12am (midnight) 10am 7am 3pm 11pm
3pm 1am 11am 8am 4pm 12am (midnight)
4pm 2am 12pm (noon) 9am 5pm 1am
5pm 3am 1pm 10am 6pm 2am
6pm 4am 2pm 11am 7pm 3am
7pm 5am 3pm 12pm (noon) 8pm 4am
8pm 6am 4pm 1pm 9pm 5am
9pm 7am 5pm 2pm 10pm 6am
10pm 8am 6pm 3pm 11pm 7am
11pm 9am 7pm 4pm 12am (midnight) 8am
0:00 10:00 20:00 17:00 1:00 9:00
1:00 11:00 21:00 18:00 2:00 10:00
2:00 12:00 22:00 19:00 3:00 11:00
3:00 13:00 23:00 20:00 4:00 12:00
4:00 14:00 0:00 21:00 5:00 13:00
5:00 15:00 1:00 22:00 6:00 14:00
6:00 16:00 2:00 23:00 7:00 15:00
7:00 17:00 3:00 0:00 8:00 16:00
8:00 18:00 4:00 1:00 9:00 17:00
9:00 19:00 5:00 2:00 10:00 18:00
10:00 20:00 6:00 3:00 11:00 19:00
11:00 21:00 7:00 4:00 12:00 20:00
12:00 22:00 8:00 5:00 13:00 21:00
13:00 23:00 9:00 6:00 14:00 22:00
14:00 0:00 10:00 7:00 15:00 23:00
15:00 1:00 11:00 8:00 16:00 0:00
16:00 2:00 12:00 9:00 17:00 1:00
17:00 3:00 13:00 10:00 18:00 2:00
18:00 4:00 14:00 11:00 19:00 3:00
19:00 5:00 15:00 12:00 20:00 4:00
20:00 6:00 16:00 13:00 21:00 5:00
21:00 7:00 17:00 14:00 22:00 6:00
22:00 8:00 18:00 15:00 23:00 7:00
23:00 9:00 19:00 16:00 0:00 8:00

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, Cote 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.

GMT Time Zone Geo Map
GMT timezone map
GMT 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
  • Europe/Belfast
  • Europe/Dublin
  • Europe/Guernsey
  • Europe/Isle_of_Man
  • Europe/Jersey
  • Europe/London
  • GB
  • GB-Eire
  • GMT
  • Iceland

Time zones with the GMT 0:00 h 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 -


AEST (Australian Eastern Standard Time)

Offset: AEST is 10 hours ahead Greenwich Mean Time (GMT) and is used in Australia

Countries: It is used in following countries: Australia

Principal Cities: The largest city in the AEST timezone is Sydney from Australia with population about 4.627 million people. Other major cities in the area are Melbourne, Brisbane, Gold Coast, Canberra

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 Australian Eastern Daylight Time (AEDT).

Start: AEST started and clocks were set one hour back on Sunday, April 1, 2018, at 3:00 (3:00 am) local time.

End: AEST ends and clocks are set one hour forward on Sunday, October 7, 2018, at 2:00 (2:00 am) local time.

Brisbane, Australia Time Zone Geo Map
Brisbane, Australia timezone map
Brisbane, Australia 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 east of the zero meridian.

Military/NATO: Used by the U.S. military, Chinese military and others
  • Kilo - Military abbreviation for AEST
  • K - short form of 'Kilo'

Time zones with the GMT +10:00 h offset:

  • AEST - Australian Eastern Standard Time
  • CHUT - Chuuk Time
  • ChST - Chamorro Standard Time
  • K - Kilo Time Zone
  • KDT - Korea Daylight Time
  • PGT - Papua New Guinea Time
  • VLAT - Vladivostok Time
  • YAKST - Yakutsk Summer Time
  • YAPT - Yap Time
  • +10 -


EDT (Eastern Daylight Time)

Offset: EDT is 4 hours behind Greenwich Mean Time (GMT) and is used in North America

Countries: It is used in following countries: Bahamas, Canada, Haiti, Turks & Caicos Is, United States

Principal Cities: The largest city in the EDT 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: Eastern Daylight Time (EDT) is a daylight saving/summer timezone, however during winter some places switch clocks for one hour back and observe Eastern Standard Time (EST).

Start: Eastern Daylight Time (EDT) starts 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.

End: Eastern Daylight Time (EDT) ends 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: HAE - Heure Avancée de l'Est

Spanish: EDT - Tiempo de verano del Este, ET - Zona Sureste

New York City, New York, USA Time Zone Geo Map
New York City, New York, USA timezone map
New York City, New York, USA representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -04 - basic short
  • -0400 - basic
  • -04:00 - extended

Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0400 - sign character (-) followed by a four digit time providing hours (04) and minutes (00) of the offset. Indicates four 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
  • Quebec - Military abbreviation for EDT
  • Q - short form of 'Quebec'

IANA/Olson: Reflects EDT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • 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/Kentucky/Louisville
  • America/Kentucky/Monticello
  • America/Louisville
  • America/Montreal
  • America/Nassau
  • America/New_York
  • America/Nipigon
  • America/Pangnirtung
  • America/Port-au-Prince
  • America/Thunder_Bay
  • America/Toronto
  • Canada/Eastern
  • EST5EDT
  • US/East-Indiana
  • US/Eastern
  • US/Michigan

Time zones with the GMT -4:00 h offset:

  • AST - Atlantic Standard Time
  • EDT - Eastern Daylight Time
  • AMT - Amazon Time
  • BOT - Bolivia Time
  • CDT - Cuba Daylight Time
  • CLT - Chile Standard Time
  • FKT - Falkland Island Time
  • GYT - Guyana Time
  • PYT - Paraguay Time
  • Q - Quebec Time Zone
  • VET - Venezuelan Standard Time
  • -04 -


PDT (Pacific Daylight Time)

Offset: PDT 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 PDT 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: Pacific Daylight Time (PDT) is a daylight saving/summer timezone, however during winter some places switch clocks for one hour back and observe Pacific Standard Time (PST).

Start: Pacific Daylight Time (PDT) starts 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.

End: Pacific Daylight Time (PDT) ends 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: HAP - Heure Avancée du Pacifique

Spanish: PT - Zona Noroeste

Los Angeles, California, USA Time Zone Geo Map
Los Angeles, California, USA timezone map
Los Angeles, California, USA 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 PDT
  • T - short form of 'Tango'

IANA/Olson: Reflects PDT 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

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

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


BST (British Summer Time)

Offset: BST is 1 hour ahead Greenwich Mean Time (GMT) and is used in Europe

Countries: It is used in following countries: Britain (UK), Guernsey, Isle of Man, Jersey

Principal Cities: The largest city in the BST timezone is London from United Kingdom with population about 7.557 million people. Other major cities in the area are Birmingham, Glasgow, Liverpool, Saint Helier

Daylight Saving: British Summer Time (BST) is a daylight saving/summer timezone, however during winter some places switch clocks for one hour back and observe Greenwich Mean Time (GMT).

Start: British Summer Time (BST) started and clocks were set one hour forward on Sunday, March 25, 2018, at 1:00 (1:00 am) local time.

End: British Summer Time (BST) ends and clocks are set one hour back on Sunday, October 28, 2018, at 2:00 (2:00 am) local time.

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
  • +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 BST
  • A - short form of 'Alpha'

IANA/Olson: Reflects BST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Europe/Belfast
  • Europe/Guernsey
  • Europe/Isle_of_Man
  • Europe/Jersey
  • Europe/London
  • GB
  • GB-Eire

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

  • British Summer Time - UTC +1:00 h
  • Bangladesh Standard Time - UTC +6:00 h
  • Bougainville Standard Time - UTC +11:00 h

Time zones with the GMT +1:00 h 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


JST (Japan Standard Time)

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

Countries: It is used in following countries: Japan

Principal Cities: The largest city in the JST timezone is Tokyo from Japan with population about 8.337 million people. Other major cities in the area are Yokohama, Osaka shi, Nagoya shi, Sapporo

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

Tokyo, Japan Time Zone Geo Map
Tokyo, Japan timezone map
Tokyo, Japan 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 JST
  • I - short form of 'India'

IANA/Olson: Reflects JST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Asia/Tokyo
  • Japan

Time zones with the GMT +9:00 h 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 -