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

Greenwich Mean Time Note:

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 DST. Locations that are on GMT part of the year are currently on 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

8:24:22AM

Saturday, April 18, 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

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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