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Dublin, Ireland to London, United Kingdom to GMT to UTC

Dublin
Ireland
IST
London
United Kingdom
BST
GMT
Greenwich Mean Time
GMT +0
UTC
Universal Time Coordinated
GMT +0

Time Difference

IST (Irish Standard Time) is 0 hours ahead of BST (British Summer Time) and 1 hour ahead of Greenwich Mean Time and 1 hour ahead of Universal Time Coordinated
10:30 am10:30 in Dublin, Ireland is 10:30 am10:30 in London, United Kingdom and is 9:30 am09:30 in GMT and is 9:30 am09:30 in UTC

Dublin to London call time
Best time for a conference call or a meeting is between 8am-6pm in Dublin which corresponds to 8am-6pm in London
Dublin to GMT call time
Best time for a conference call or a meeting is between 9am-6pm in Dublin which corresponds to 8am-5pm in GMT
Dublin to UTC call time
Best time for a conference call or a meeting is between 9am-6pm in Dublin which corresponds to 8am-5pm in UTC

10:30 am10:30 IST (Irish Standard Time) (Dublin, Ireland). Offset UTC +1:00 hour
10:30 am10:30 BST (British Summer Time) (London, United Kingdom). Offset UTC +1:00 hour
9:30 am09:30 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
9:30 am09:30 Universal Time Coordinated (UTC). Offset UTC 0:00 hours

10:30 am10:30 Dublin, Ireland / 10:30 am10:30 London, United Kingdom / 9:30 am09:30 GMT / 9:30 am09:30 UTC

Dublin, Ireland London, United Kingdom GMT UTC
12am (midnight) 12am (midnight) 11pm 11pm
1am 1am 12am (midnight) 12am (midnight)
2am 2am 1am 1am
3am 3am 2am 2am
4am 4am 3am 3am
5am 5am 4am 4am
6am 6am 5am 5am
7am 7am 6am 6am
8am 8am 7am 7am
9am 9am 8am 8am
10am 10am 9am 9am
11am 11am 10am 10am
12pm (noon) 12pm (noon) 11am 11am
1pm 1pm 12pm (noon) 12pm (noon)
2pm 2pm 1pm 1pm
3pm 3pm 2pm 2pm
4pm 4pm 3pm 3pm
5pm 5pm 4pm 4pm
6pm 6pm 5pm 5pm
7pm 7pm 6pm 6pm
8pm 8pm 7pm 7pm
9pm 9pm 8pm 8pm
10pm 10pm 9pm 9pm
11pm 11pm 10pm 10pm
0:00 0:00 23:00 23:00
1:00 1:00 0:00 0:00
2:00 2:00 1:00 1:00
3:00 3:00 2:00 2:00
4:00 4:00 3:00 3:00
5:00 5:00 4:00 4:00
6:00 6:00 5:00 5:00
7:00 7:00 6:00 6:00
8:00 8:00 7:00 7:00
9:00 9:00 8:00 8:00
10:00 10:00 9:00 9:00
11:00 11:00 10:00 10:00
12:00 12:00 11:00 11:00
13:00 13:00 12:00 12:00
14:00 14:00 13:00 13:00
15:00 15:00 14:00 14:00
16:00 16:00 15:00 15:00
17:00 17:00 16:00 16:00
18:00 18:00 17:00 17:00
19:00 19:00 18:00 18:00
20:00 20:00 19:00 19:00
21:00 21:00 20:00 20:00
22:00 22:00 21:00 21:00
23:00 23:00 22:00 22:00

Dublin Information

Time Zone

Abbreviation / Name
IST - Irish Standard Time
GMT - Greenwich Mean Time
UTC / GMT Offset
+1:00 hour during Irish Standard Time, currently in use.
0:00 hours during Greenwich Mean Time.
Daylight Saving Time Change
+1:00 hour - DST is in use
Daylight Saving Time Starts
Daylight saving time clock moves forward for one hour from 1am to 2am Sunday, March 30, 2025 at 1:00 am local time. DST starts annually the on last Sunday of March. Clocks are turned forward 1 hour to Sunday, March 30, 2025, 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 26, 2025 at 2:00 am local time. DST ends annually the on last Sunday of October. Clocks are turned backward 1 hour to Sunday, October 26, 2025, 1:00 am local standard time instead. Also called Fall Back or switch to Winter Time.

Dublin Facts

Country
Ireland
Alternative Names
Baile Atha Cliath, Baile Átha Cliath, Ciuda de Dublin, Ciudá de Dublín, DUB, Dablin, Diblin, Difelin, Divlyn, Doublino, Dublin, Dublin city, Dublina, Dublinas, Dublini, Dublino, Dublinu, Dublín, Dublîn, Dueblin, Dulenn, Dulyn, Dyflinn, Düblin, Eblana, dabalina, dablin, dablina, daburin, dbln, dblyn, deobeullin, dou bai lin, dublini, dwblyn, taplin, Δουβλίνο, Даблин, Дублин, Дублін, Дъблин, Դուբլին, דבלין, דובלין, دبلن, دوبلين, دوبلین, دۇبلىن, ڈبلن, ډبلن, ܕܒܠܢ, डब्लिन, दब्लिन, ডাবলিন, ਡਬਲਿਨ, டப்லின், ಡಬ್ಲಿನ್, ഡബ്ലിൻ, ดับลิน, དུབ་ལིན།, ဒပ်ဗလင်မြို့, დუბლინი, ደብሊን, ダブリン, 都柏林, 더블린
Population
1,024,027
Currency
Euro (EUR)
Geographic Coordinates
53° 19' N Latitude / 6° 14' W Longitude
International Dialing Code
+353

London Information

Time Zone

Abbreviation / Name
BST - British Summer Time
UTC / GMT Offset
+1:00 hour during British Summer Time, currently in use.

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

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+11:00 - UTC +11
  • GMT-01:00 - UTC -1
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

Universal Time Coordinated

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

Coordinated Universal Time (UTC) is the world time standard that regulates clocks and time. It is successor to Greenwich Mean Time (GMT). For casual use, UTC is the same as GMT, but is used by the scientific community.
UTC is the time standard commonly used across the world since 1972. It is used in many technical fields, like aviation industry and meteorologists, also used to synchronize time across internet networks.

UTC 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 UTC
  • Z - short form of 'Zulu'
IANA/Olson: Reflects UTC time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Etc/UCT
  • Etc/UTC
  • Etc/Universal
  • Etc/Zulu
  • UCT
  • UTC
  • Universal
  • Zulu
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
EST to IST GMT to EST PST to EST EST to GMT PST to GMT