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PDT/PST
Pacific Daylight Time
GMT -7:00 h
PST automatically adjusted to PDT time zone, that is in use
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
GMT
Greenwich Mean Time
GMT 0:00 h

Time Difference

Pacific Daylight Time is 3 hours behind of Eastern Daylight Time and 2 hours behind of Central Daylight Time and 7 hours behind of Greenwich Mean Time
So 3:00 PM15:00 in PDT is 6:00 PM18:00 in EDT and is 5:00 PM17:00 in CDT and is 10:00 PM22:00 in GMT

3:00 PM15:00 Pacific Daylight Time (PDT). Offset UTC -7:00 hours
6:00 PM18:00 Eastern Daylight Time (EDT). Offset UTC -4:00 hours
5:00 PM17:00 Central Daylight Time (CDT). Offset UTC -5:00 hours
10:00 PM22:00 Greenwich Mean Time (GMT). Offset UTC 0:00 hours

3:00 PM15:00 PDT / 6:00 PM18:00 EDT / 5:00 PM17:00 CDT / 10:00 PM22:00 GMT

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

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 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 12, 2017, 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 5, 2017, 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
  • YDT - Yukon Daylight Time
  • PST - Pitcairn Standard Time
  • U - Uniform Time Zone


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, 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 12, 2017, 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 5, 2017, 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
  • COT - Colombia Time
  • CST - Cuba Standard Time
  • EASST - Easter Island Summer Time
  • ECT - Ecuador Time
  • PET - Peru Time
  • R - Romeo Time Zone
  • -05 -
  • 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 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 12, 2017, 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 5, 2017, 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
  • - UTC -5:00 h

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

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


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

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

  • Greenwich Mean Time - UTC 0:00 h
  • - UTC 0:00 h

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
  • WET -
  • GMT -
  • +00 -