Home > Time Zones > Abbreviations > GMT – Greenwich Mean Time

GMT – Greenwich Mean Time / Coordinated Universal Time (Standard Time)

Also known as: UTC – Coordinated Universal Time, GT – Greenwich Time

GMT is currently only used in a few locations

Antarctica: GMT is not observed in any location this year. Locations that used to be on GMT for part or all of the year are now on CEST instead.

Europe: Only some locations are currently on GMT because most places in this time zone are currently on summer time / daylight saving time and are observing IST or BST.

Time zone map of GMT
Currently observing GMT.
Observes GMT part of the year.
Areas with same time currently (UTC +0:00).
Currently observing GMT – Greenwich Mean Time.
Observes GMT – Greenwich Mean Time part of the year, but not currently.
Currently has same time zone offset as GMT (UTC +0:00) but different time zone name.

Greenwich Mean Time (GMT) has no offset from Coordinated Universal Time (UTC). This time zone is a standard time zone and is used in: Europe, Africa, North America, Antarctica.

This time zone is often called Greenwich Mean Time.

See full time zone map

Summer Time & DST

Some places observe daylight saving time/summer time during the summer, and therefore use IST (Irish Standard Time) or BST (British Summer Time) in the summer.

Email time zone indicator: +0000

An email sent from someone in the Greenwich Mean Time (GMT) time zone will have the time zone listed as "+0000" in the headers of the email. (However, "+0000" does not have to be in Greenwich Mean Time, as other time zones could have the same UTC offset).

Where and when is GMT observed?

Europe

European countries/territories using GMT all year

  • Greenland (Danmarkshavn)
  • Iceland

European countries/territories using GMT in the winter and IST or BST in the summer

  • Ireland
  • Isle of Man
  • United Kingdom - main islands Show

    England, Wales, Scotland, Northern Ireland

Africa

African countries using GMT all year

  • Burkina Faso
  • Cote d'Ivoire (Ivory Coast)
  • Gambia
  • Ghana
  • Guinea
  • Guinea-Bissau
  • Liberia
  • Mali
  • Mauritania
  • Saint Helena
  • Sao Tome and Principe
  • Senegal
  • Sierra Leone
  • Togo

North America

Areas of Greenland using GMT all year

  • Danmarkshavn

Antarctica

Locations in Antarctica using GMT in the summer and CEST in the winter

  • Troll Station

Other time zones in UTC +0:00

Some time zones exist that have the same offset as GMT, but can be found under a different name:

GMT time now

Only used in a few locations

4:23:10AM

Tuesday, June 30, 2015

  • GMT will be observed in Troll Station until Oct 25, 2015 at 3:00 AM
  • GMT will be observed in London starting from Oct 25, 2015 at 2:00 AM
  • UTC Offset: UTC +0:00
  • 4 hours ahead of Washington DC
  • Most locations changed to BST

BST time now

5:23:10AM

Tuesday, June 30, 2015

UTC Offset: UTC +1:00

Go to BST


Find current time and time zone by city


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Example cities

United Kingdom – London (Winter)
Iceland – Reykjavik (All Year)
Sierra Leone – Freetown (All Year)
Greenland – Danmarkshavn (All Year)
Antarctica – Troll Station (Summer)

Related time zones

IST – Irish Standard Time (Daylight Time)
BST – British Summer Time (Daylight Time)


Time Zone Map with DST

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