GMT
Greenwich Mean Time
GMT +0
Mauritania
GMT
Pennsylvania, USA
EST
Denmark
CET
United Kingdom
GMT
ACDT
Australian Central Daylight Time
GMT +10:30

Time Difference

Greenwich Mean Time is 0 hours ahead of GMT (Greenwich Mean Time) and 5 hours ahead of EST (Eastern Standard Time) and 1 hours behind CET (Central European Time) and 0 hours ahead of GMT (Greenwich Mean Time) and 10 hours and 30 minutes behind Australian Central Daylight Time
5:00 pm17:00 in GMT is 5:00 pm17:00 in Nouakchott, Mauritania and is 12:00 pm12:00 in Pittsburgh, PA, USA and is 6:00 pm18:00 in Copenhagen, Denmark and is 5:00 pm17:00 in London, United Kingdom and is 3:30 am03:30 in ACDT

GMT to Nouakchott call time
Best time for a conference call or a meeting is between 8am-6pm in GMT which corresponds to 8am-6pm in Nouakchott
GMT to Pittsburgh call time
Best time for a conference call or a meeting is between 1pm-6pm in GMT which corresponds to 8am-1pm in Pittsburgh
GMT to Copenhagen call time
Best time for a conference call or a meeting is between 8am-5pm in GMT which corresponds to 9am-6pm in Copenhagen
GMT to London call time
Best time for a conference call or a meeting is between 8am-6pm in GMT which corresponds to 8am-6pm in London
GMT to ACDT call time
Best time for a conference call or a meeting is between 7:30am-9:30am in GMT which corresponds to 6pm-8pm in ACDT

5:00 pm17:00 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
5:00 pm17:00 GMT (Greenwich Mean Time) (Nouakchott, Mauritania). Offset UTC 0:00 hours
12:00 pm12:00 EST (Eastern Standard Time) (Pittsburgh, PA, USA). Offset UTC -5:00 hours
6:00 pm18:00 CET (Central European Time) (Copenhagen, Denmark). Offset UTC +1:00 hour
5:00 pm17:00 GMT (Greenwich Mean Time) (London, United Kingdom). Offset UTC 0:00 hours
3:30 am03:30 Australian Central Daylight Time (ACDT). Offset UTC +10:30 hours

5:00 pm17:00 GMT / 5:00 pm17:00 Nouakchott, Mauritania / 12:00 pm12:00 Pittsburgh, PA, USA / 6:00 pm18:00 Copenhagen, Denmark / 5:00 pm17:00 London, United Kingdom / 3:30 am03:30 ACDT

GMT Nouakchott, Mauritania Pittsburgh, PA, USA Copenhagen, Denmark London, United Kingdom ACDT
12am (midnight) 12am (midnight) 7pm 1am 12am (midnight) 10:30 am
1am 1am 8pm 2am 1am 11:30 am
2am 2am 9pm 3am 2am 12:30 pm
3am 3am 10pm 4am 3am 1:30 pm
4am 4am 11pm 5am 4am 2:30 pm
5am 5am 12am (midnight) 6am 5am 3:30 pm
6am 6am 1am 7am 6am 4:30 pm
7am 7am 2am 8am 7am 5:30 pm
8am 8am 3am 9am 8am 6:30 pm
9am 9am 4am 10am 9am 7:30 pm
10am 10am 5am 11am 10am 8:30 pm
11am 11am 6am 12pm (noon) 11am 9:30 pm
12pm (noon) 12pm (noon) 7am 1pm 12pm (noon) 10:30 pm
1pm 1pm 8am 2pm 1pm 11:30 pm
2pm 2pm 9am 3pm 2pm 12:30 am
3pm 3pm 10am 4pm 3pm 1:30 am
4pm 4pm 11am 5pm 4pm 2:30 am
5pm 5pm 12pm (noon) 6pm 5pm 3:30 am
6pm 6pm 1pm 7pm 6pm 4:30 am
7pm 7pm 2pm 8pm 7pm 5:30 am
8pm 8pm 3pm 9pm 8pm 6:30 am
9pm 9pm 4pm 10pm 9pm 7:30 am
10pm 10pm 5pm 11pm 10pm 8:30 am
11pm 11pm 6pm 12am (midnight) 11pm 9:30 am
0:00 0:00 19:00 1:00 0:00 10:30
1:00 1:00 20:00 2:00 1:00 11:30
2:00 2:00 21:00 3:00 2:00 12:30
3:00 3:00 22:00 4:00 3:00 13:30
4:00 4:00 23:00 5:00 4:00 14:30
5:00 5:00 0:00 6:00 5:00 15:30
6:00 6:00 1:00 7:00 6:00 16:30
7:00 7:00 2:00 8:00 7:00 17:30
8:00 8:00 3:00 9:00 8:00 18:30
9:00 9:00 4:00 10:00 9:00 19:30
10:00 10:00 5:00 11:00 10:00 20:30
11:00 11:00 6:00 12:00 11:00 21:30
12:00 12:00 7:00 13:00 12:00 22:30
13:00 13:00 8:00 14:00 13:00 23:30
14:00 14:00 9:00 15:00 14:00 0:30
15:00 15:00 10:00 16:00 15:00 1:30
16:00 16:00 11:00 17:00 16:00 2:30
17:00 17:00 12:00 18:00 17:00 3:30
18:00 18:00 13:00 19:00 18:00 4:30
19:00 19:00 14:00 20:00 19:00 5:30
20:00 20:00 15:00 21:00 20:00 6:30
21:00 21:00 16:00 22:00 21:00 7:30
22:00 22:00 17:00 23:00 22:00 8:30
23:00 23:00 18:00 0:00 23:00 9:30

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 - UTC +1
  • GMT+06:00 - UTC +6
  • 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

Nouakchott Information

Time Zone

Abbreviation / Name
GMT - Greenwich Mean Time
UTC / GMT Offset
0:00 hours during Greenwich Mean Time, currently in use.

Nouakchott Facts

Country
Mauritania
Alternative Names
NKC, Naevakjut, Nawakshot, Nawakszut, Nouakchat, Nouakchot, Nouakchott, Nouaksot, Nouaxot, Nuakchot, Nuakshot, Nuaksjott, Nuaksot, Nuaksota, Nuaksotas, Nuaksoto, Nuaksott, Nuakxot, Nuakŝoto, Nuakşot, Nuakšot, Nuakšota, Nuakšotas, Nuakšott, Nwaqcut, Nwaqcuṭ, Nävakjut, Núaksjott, huo suo, navakasuta, nu wa ke xiao te, nu'akacota, nu'oyakasuta, nuagsyoteu, nuakushotto, nuvakcut, nwakshwt, Νουακσότ, Νουαξότ, Нуакшот, Նուակշոտ, נואקשוט, نواكشوط, نواکشوت, نواکشوط, نواکشۆت, نوواکوٹ, नवाकसुत, নুওয়াকশুত, ਨੁਆਕਚੋਤ, நுவாக்சூத், นูแอกชอต, ནའུ་ཀ་ཅོ་ཊི།, ნუაქშოტი, ኑዋክሾት, ヌアクショット, 努瓦克肖特, 或索, 누악쇼트
Population
661,400
Currency
Ouguiya (MRU)
Geographic Coordinates
18° 05' N Latitude / 15° 58' W Longitude
International Dialing Code
+222

Pittsburgh Information

Time Zone

Abbreviation / Name
EST - Eastern Standard Time
EDT - Eastern Daylight Time
UTC / GMT Offset
-5:00 hours during Eastern Standard Time, currently in use.
-4:00 hours during Eastern Daylight Time.
Daylight Saving Time Change
+1:00 hour - DST is NOT in use
Daylight Saving Time Starts
Daylight saving time clock moves forward for one hour from 2am to 3am Sunday, March 13, 2022 at 2:00 am local time. DST starts annually the on second Sunday of March. Clocks are turned forward 1 hour to Sunday, March 13, 2022, 3:00 am local daylight time instead. Also called Spring Forward or Summer Time.
Daylight Saving Time Ends
Daylight saving time clock moves back for one hour from 2am to 1am Sunday, November 6, 2022 at 2:00 am local time. DST ends annually the on first Sunday of November. Clocks are turned backward 1 hour to Sunday, November 6, 2022, 1:00 am local standard time instead. Also called Fall Back or switch to Winter Time.

Pittsburgh Facts

Country
USA
State
Pennsylvania
Alternative Names
Allegheny, Fort Dunmore, Fort Duquesne, Fort Pitt, Fort Trent, PIT, Pitsbrg, Pitsburg, Pitsburga, Pitsburgas, Pitsburgo, Pitsmpernk, Pitts-Bourg, Pittsbarig, Pittsburg, Pittsburgh, Pittsburgum, Pittsburq, The Manor of Pittsburgh, bytsbrgh, phitts beirk, pi ci bao, pi zi bao, picheubeogeu, pitasabaraga, pitsabarga, pitspark, pits‌barg, pittsubagu, pytsbrg pnsylwanya, pytsbwrg, Πίτσμπεργκ, Питсбург, Питсбърг, Питтсбург, Пітсбург, Піттсбург, פיטסבורג, بيتسبرغ, پٹس برگ, پٹسبرگ, پیتسبرگ، پنسیلوانیا, पिट्सबर्ग, ਪਿਟਸਬਰਗ, பிட்ஸ்பர்க், పిట్స్‌బర్గ్, ಪಿಟ್ಸ್‌ಬರ್ಗ್, พิตต์สเบิร์ก, ピッツバーグ, 匹兹堡, 匹茲堡, 피츠버그
Population
304,391
Currency
Dollar (USD)
Geographic Coordinates
40° 26' N Latitude / 79° 59' W Longitude
International Dialing Code
+1

Copenhagen Information

Time Zone

Abbreviation / Name
CET - Central European Time
CEST - Central European Summer Time
UTC / GMT Offset
+1:00 hour during Central European Time, currently in use.
+2:00 hours during Central European Summer Time.
Daylight Saving Time Change
+1:00 hour - DST is NOT in use
Daylight Saving Time Starts
Daylight saving time clock moves forward for one hour from 2am to 3am Sunday, March 27, 2022 at 2:00 am local time. DST starts annually the on last Sunday of March. Clocks are turned forward 1 hour to Sunday, March 27, 2022, 3:00 am local daylight time instead. Also called Spring Forward or Summer Time.
Daylight Saving Time Ends
Daylight saving time clock moves back for one hour from 3am to 2am Sunday, October 30, 2022 at 3:00 am local time. DST ends annually the on last Sunday of October. Clocks are turned backward 1 hour to Sunday, October 30, 2022, 2:00 am local standard time instead. Also called Fall Back or switch to Winter Time.

Copenhagen Facts

Country
Denmark
Alternative Names
CPH, Cobanhavan, Copenaga, Copenaghen, Copenaguen, Copenhaga, Copenhagen, Copenhague, Copenhaguen, Copenhaguen - Kobenhavn, Copenhaguen - København, Cóbanhávan, Hafnia, Kapehngagen, Kaupmannahoefn, Kaupmannahöfn, Keypmannahavn, Kjobenhavn, Kjopenhamn, Kjøpenhamn, Kobenhamman, Kobenhaven, Kobenhavn, Kodan, Kodaň, Koebenhavn, Koeoepenhamina, Koepenhamn, Kopenage, Kopenchage, Kopengagen, Kopenhaagen, Kopenhag, Kopenhaga, Kopenhage, Kopenhagen, Kopenhagena, Kopenhago, Kopenhāgena, Kopenkhagen, Koppenhaga, Koppenhága, Kòpenhaga, Köbenhavn, Köpenhamn, Kööpenhamina, København, Københámman, ge ben ha gen, khopenheken, kopanahagana, kopenahagena, kopenahegena, kopenhagen, kwbnhaghn, kwpnhgn, qwpnhgn, Κοπεγχάγη, Капэнгаген, Копенгаген, Копенхаген, Կոպենհագեն, קופנהאגן, קופנהגן, كوبنهاغن, كوپېنھاگېن, ܟܘܦܢܗܓܢ, कोपनहागन, কোপেনহাগেন, কোপেনহেগেন, โคเปนเฮเกน, ཀའོ་པེན་ཧ་ཀེན, კოპენჰაგენი, ኮፐንሀገን, ኮፕንሀግ, コペンハーゲン, 哥本哈根, 코펜하겐
Population
1,153,615
Currency
Krone (DKK)
Geographic Coordinates
55° 40' N Latitude / 12° 33' E Longitude
International Dialing Code
+45

London Information

Time Zone

Abbreviation / Name
GMT - Greenwich Mean Time
BST - British Summer Time
UTC / GMT Offset
0:00 hours during Greenwich Mean Time, currently in use.
+1:00 hour during British Summer Time.
Daylight Saving Time Change
+1:00 hour - DST is NOT in use
Daylight Saving Time Starts
Daylight saving time clock moves forward for one hour from 1am to 2am Sunday, March 27, 2022 at 1:00 am local time. DST starts annually the on last Sunday of March. Clocks are turned forward 1 hour to Sunday, March 27, 2022, 2:00 am local daylight time instead. Also called Spring Forward or Summer Time.
Daylight Saving Time Ends
Daylight saving time clock moves back for one hour from 2am to 1am Sunday, October 30, 2022 at 2:00 am local time. DST ends annually the on last Sunday of October. Clocks are turned backward 1 hour to Sunday, October 30, 2022, 1:00 am local standard time instead. Also called Fall Back or switch to Winter Time.

London Facts

Country
United Kingdom
Alternative Names
ILondon, LON, Lakana, Landan, Landen, Ljondan, Llundain, Lodoni, Londain, Londan, Londar, Londe, Londen, Londin, Londinium, Londino, Londn, London, London osh, Londona, Londonas, Londoni, Londono, Londons, Londonu, Londra, Londres, Londrez, Londri, Londro, Londye, Londyn, Londýn, Lonn, Lontoo, Loundres, Luan GJon, Lun-tun, Lunden, Lundra, Lundun, Lundunir, Lundúnir, Lung-dung, Lunnainn, Lunnin, Lunnon, Luân Đôn, Lùn-tûn, Lùng-dŭng, Lûn-tun, Lākana, Lůndůn, Lọndọnu, Ranana, Rānana, ilantan, ladana, landan, landana, leondeon, lndn, london, londoni, lun dui, lun dun, lwndwn, lxndxn, rondon, Łondra, Λονδίνο, Лондан, Лондон, Лондон ош, Лондонъ, Лёндан, Լոնդոն, לאנדאן, לונדון, لأندأن, لندن, لوندون, لەندەن, ܠܘܢܕܘܢ, लंडन, लंदन, लण्डन, लन्डन्, लन्दन, লন্ডন, ਲੰਡਨ, લંડન, ଲଣ୍ଡନ, இலண்டன், లండన్, ಲಂಡನ್, ലണ്ടൻ, ලන්ඩන්, ลอนดอน, ລອນດອນ, ལོན་ཊོན།, လန်ဒန်မြို့, ლონდონი, ለንደን, ᎫᎴ ᏗᏍᎪᏂᎯᏱ, ロンドン, 伦敦, 倫敦, 런던
Population
7,556,900
Currency
Pound (GBP)
Geographic Coordinates
51° 30' N Latitude / 0° 07' W Longitude
International Dialing Code
+44

Australian Central Daylight Time

Offset: ACDT is 10 hours and 30 minutes 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 ACDT timezone is Adelaide from Australia with population about 1.225 million people. Other major cities in the area are Adelaide Hills, Mount Gambier, Morphett Vale, Prospect

ACDT Time Zone Geo Map
ACDT timezone map

Daylight Saving: Australian Central Daylight Time (ACDT) is a daylight saving/summer timezone, however during winter some places switch clocks for one hour back and observe Australian Central Standard Time (ACST).

Daylight saving time clock moves forward for one hour from 2am to 3amStart: Australian Central Daylight Time (ACDT) started on Sunday, October 3, 2021 at 2:00 am local time and clocks were set one hour forward to Sunday, October 3, 2021, 3:00 am. Daylight saving starts annually the on first Sunday of October

Daylight saving time clock moves back for one hour from 3am to 2amEnd: Australian Central Daylight Time (ACDT) ends on Sunday, April 3, 2022 at 3:00 am local time and clocks are set one hour back to Sunday, April 3, 2022, 2:00 am local standard time instead. Daylight saving ends annually the on first Sunday of April

ACDT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +1030 - basic
  • +10:30 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +1030 - sign character (+) followed by a four digit time providing hours (10) and minutes (30) of the offset. Indicates ten hour and thirty minutes time differences to the east of the zero meridian.
IANA/Olson: Reflects ACDT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Australia/Adelaide
  • Australia/Broken_Hill
  • Australia/South
  • Australia/Yancowinna
Time zones with the GMT +10:30 offset:
  • ACDT - Australian Central Daylight Time
  • LHST - Lord Howe Standard Time