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.

Formby timeZone GMT
Freeland timeZone GMT
subject surface form: Glympton
subject surface form: Grayshott
subject surface form: Great Yarmouth
Gwynedd timeZone GMT
Hampton Hill timeZone GMT
Harpley timeZone GMT
Harpurhey timeZone GMT
Harrow timeZone GMT
Heacham timeZone GMT
Hereford timeZone GMT
High Wycombe timeZone GMT
Hooley timeZone GMT
Hucknall timeZone GMT
Hyde timeZone GMT
Ipswich timeZone GMT
Knightsbridge timeZone GMT
Lancaster timeZone GMT
subject surface form: Leven
Leyland timeZone GMT
Lisburn timeZone GMT
subject surface form: Maida Vale
Maidenhead timeZone GMT
Maidstone timeZone GMT
Morecambe timeZone GMT
Morley timeZone GMT
Mossley timeZone GMT
Motherwell timeZone GMT
Newport timeZone GMT
Northampton timeZone GMT
Ollerton timeZone GMT
Overstrand timeZone GMT
Oxford timeZone GMT
Pittenweem timeZone GMT
Preston timeZone GMT
Ramsbottom timeZone GMT
Redhill timeZone GMT
Reigate timeZone GMT
Ribble Valley timeZone GMT
Rostrevor timeZone GMT