GMT

E3380

GMT (Greenwich Mean Time) is the mean solar time at the Royal Observatory in Greenwich, London, historically used as the international civil time standard and the basis for modern time zones.

Observed surface forms (2)

Surface form Occurrences
Greenwich time 1
Universal Time 1

Statements (42)

Predicate Object
instanceOf time scale
time standard
abbreviationOf Greenwich Mean Time
basedOn mean solar time
category time in the United Kingdom
time zones
definedBy mean solar time at Greenwich meridian
fullName Greenwich Mean Time
governingBody Maritime Greenwich
surface form: Royal Observatory, Greenwich
hasNoDaylightSavingOffset true
historicallyReplacedBy Coordinated Universal Time
introducedInCentury 19th century
locatedIn Greenwich
London, England
surface form: London

United Kingdom
measuredAt Maritime Greenwich
surface form: Royal Observatory, Greenwich
observedAsStandardTimeIn Burkina Faso
Côte d'Ivoire
Bioko Island
surface form: Equatorial Guinea (Bioko Island)

Ghana
Guinea
Guinea-Bissau
Iceland
Ireland
surface form: Ireland (winter)

Liberia
Mali
Portugal (mainland, winter)
Senegal
Sierra Leone
The Gambia
Togo
United Kingdom (winter)
referenceLongitude 0 degrees longitude
referenceMeridian Prime Meridian
relatedTo Coordinated Universal Time
surface form: UTC
supersededInPrecisionBy atomic time
timeOffsetFromUTC UTC+00:00
usedAs basis for modern time zones
international civil time standard
usedFor international timekeeping
navigation
railway timetables

Referenced by (149)

Full triples — surface form annotated when it differs from this entity's canonical label.

Royton timeZone GMT
Salford timeZone GMT
Sarsden timeZone GMT
Seaton Carew timeZone GMT
Sedbergh timeZone GMT
Shaw timeZone GMT
Shepperton timeZone GMT
Sidcup (part) timeZone GMT
subject surface form: Sidcup
Slough timeZone GMT
Soho timeZone GMT
Solihull timeZone GMT
Southampton timeZone GMT
Spalding timeZone GMT
Spelsbury timeZone GMT
Stalybridge timeZone GMT
Stroud timeZone GMT
Swanley timeZone GMT
Tarleton timeZone GMT
Tetbury timeZone GMT
Torquay timeZone GMT
subject surface form: Upper Clatford
Uppermill timeZone GMT
Watford timeZone GMT
Whitehaven timeZone GMT
Wimbledon timeZone GMT
subject surface form: Woodstock, Oxfordshire
Aldermaston timezone GMT
Carnoustie timezone GMT
Chertsey timezone GMT
Deal, Kent timezone GMT
Diggle timezone GMT
Dudley timezone GMT
Fakenham timezone GMT
subject surface form: Hendon
Milton Keynes timezone GMT
Ordsall timezone GMT
Runcorn timezone GMT
Southport timezone GMT
St Neots timezone GMT