GMT
Greenwich Mean Time
GMT +0
EST/EDT
Eastern Standard Time
GMT -5
EDT automatically adjusted to EST time zone, that is in use
CST/CDT
Central Standard Time
GMT -6
CDT automatically adjusted to CST time zone, that is in use
MST/MDT
Mountain Standard Time
GMT -7
MDT automatically adjusted to MST time zone, that is in use
PST/PDT
Pacific Standard Time
GMT -8
PDT automatically adjusted to PST time zone, that is in use

Time Difference

Greenwich Mean Time is 5 hours ahead of Eastern Standard Time and 6 hours ahead of Central Standard Time and 7 hours ahead of Mountain Standard Time and 8 hours ahead of Pacific Standard Time
5:00 pm17:00 in GMT is 12:00 pm12:00 in EST and is 11:00 am11:00 in CST and is 10:00 am10:00 in MST and is 9:00 am09:00 in PST

GMT to EDT call time
Best time for a conference call or a meeting is between 12pm-6pm in GMT which corresponds to 8am-2pm in EDT
GMT to CDT call time
Best time for a conference call or a meeting is between 1pm-6pm in GMT which corresponds to 8am-1pm in CDT
GMT to MDT call time
Best time for a conference call or a meeting is between 2pm-6pm in GMT which corresponds to 8am-12pm in MDT
GMT to PDT call time
Best time for a conference call or a meeting is between 3pm-6pm in GMT which corresponds to 8am-11am in PDT

5:00 pm17:00 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
12:00 pm12:00 Eastern Standard Time (EST). Offset UTC -5:00 hours
11:00 am11:00 Central Standard Time (CST). Offset UTC -6:00 hours
10:00 am10:00 Mountain Standard Time (MST). Offset UTC -7:00 hours
9:00 am09:00 Pacific Standard Time (PST). Offset UTC -8:00 hours

5:00 pm17:00 GMT / 12:00 pm12:00 EST / 11:00 am11:00 CST / 10:00 am10:00 MST / 9:00 am09:00 PST

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

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, 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.

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
  • 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
GMT Abbreviation: Several time zones share GMT abbreviation and it could refer to these time zones
  • Greenwich Mean Time - UTC +0
  • GMT+03:00 - UTC +3
  • GMT+06:00 - UTC +6
  • GMT - UTC +0
  • GMT+11:00 - UTC +11
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

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

French: HAE - Heure Avancée de l'Est

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

EDT Time Zone Geo Map
EDT timezone map

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

Daylight saving time clock moves back for one hour from 2am to 1amEnd: Eastern Daylight Time (EDT) has ended on Sunday, November 1, 2020 at 2:00 am local time and clocks were set one hour back to Sunday, November 1, 2020, 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: Eastern Daylight Time (EDT) starts on Sunday, March 14, 2021 at 2:00 am local time and clocks are set one hour forward to Sunday, March 14, 2021, 3:00 am. Daylight saving starts annually the on second Sunday of March

EDT 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 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
  • HLV - Hora Legal de Venezuela
  • PYT - Paraguay Time
  • Q - Quebec Time Zone
  • VET - Venezuelan Standard Time

Central Daylight Time

Offset: CDT is 5 hours behind Greenwich Mean Time (GMT) and is used in North America

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

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

French: HAC - Heure Avancée du Centre

Spanish: CT - Zona Centro

CDT Time Zone Geo Map
CDT timezone map

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

Daylight saving time clock moves back for one hour from 2am to 1amEnd: Central Daylight Time (CDT) has ended on Sunday, November 1, 2020 at 2:00 am local time and clocks were set one hour back to Sunday, November 1, 2020, 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: Central Daylight Time (CDT) starts on Sunday, March 14, 2021 at 2:00 am local time and clocks are set one hour forward to Sunday, March 14, 2021, 3:00 am. Daylight saving starts annually the on second Sunday of March

CDT 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 CDT
  • R - short form of 'Romeo'
IANA/Olson: Reflects CDT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Bahia_Banderas
  • America/Chicago
  • America/Indiana/Knox
  • America/Indiana/Tell_City
  • America/Knox_IN
  • 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/Resolute
  • America/Winnipeg
  • CST6CDT
  • Canada/Central
  • Mexico/General
  • US/Central
  • US/Indiana-Starke
CDT Abbreviation: Several time zones share CDT abbreviation and it could refer to these time zones
  • Central Daylight Time - UTC -5
  • Cuba Daylight Time - UTC -4
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 Ciudad Juarez from Mexico with population about 1.512 million people. Other major cities in the area are Calgary, Chihuahua, Edmonton, El Paso

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 1, 2020 at 2:00 am local time and clocks were set one hour back to Sunday, November 1, 2020, 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 14, 2021 at 2:00 am local time and clocks are set one hour forward to Sunday, March 14, 2021, 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/Chihuahua
  • America/Denver
  • America/Edmonton
  • America/Inuvik
  • America/Mazatlan
  • America/Ojinaga
  • America/Shiprock
  • America/Yellowknife
  • Canada/Mountain
  • MST7MDT
  • Mexico/BajaSur
  • 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

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

French: HAP - Heure Avancée du Pacifique

Spanish: PT - Zona Noroeste

PDT Time Zone Geo Map
PDT timezone map

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

Daylight saving time clock moves back for one hour from 2am to 1amEnd: Pacific Daylight Time (PDT) has ended on Sunday, November 1, 2020 at 2:00 am local time and clocks were set one hour back to Sunday, November 1, 2020, 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: Pacific Daylight Time (PDT) starts on Sunday, March 14, 2021 at 2:00 am local time and clocks are set one hour forward to Sunday, March 14, 2021, 3:00 am. Daylight saving starts annually the on second Sunday of March

PDT 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/Ensenada
  • America/Los_Angeles
  • America/Santa_Isabel
  • America/Tijuana
  • America/Vancouver
  • Canada/Pacific
  • Mexico/BajaNorte
  • PST8PDT
  • US/Pacific
Time zones with the GMT -7 offset:
  • MST - Mountain Standard Time
  • PDT - Pacific Daylight Time
  • YST - Yukon Standard Time
  • T - Tango Time Zone