Identifier for the UTC +0 offset
UTC+00:00
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World map with the time zone highlighted
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UTC
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02:33, 29 May 2024
UTC+00:00
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UTC+00:00
is an identifier for a
time offset from UTC
of +00:00. This time zone is the basis of
Coordinated Universal Time
(UTC) and all other time zones are based on it. In
ISO 8601
, an example of the associated time would be written as 2069-01-01T12:12:34+00:00. It is also known by the following geographical or historical names:
As standard time (Northern Hemisphere winter)
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Principal cities:
London
,
Birmingham
,
Manchester
,
Edinburgh
,
Liverpool
,
Bristol
,
Belfast
,
Glasgow
,
Cardiff
,
Dublin
,
Limerick
,
Las Palmas de Gran Canaria
,
Santa Cruz de Tenerife
,
Lisbon
,
Porto
Europe
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Western Europe
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Atlantic islands
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Notes:
- The westernmost point where UTC with DST is applied is
El Hierro
,
Canary Islands
, Spain (
18°00′ W
). Time used there is 2 hours and 12 minutes ahead of physical time in the summer, making for the greatest discrepancy in the UTC time zone.
- The easternmost settlement where UTC with DST is applied is
Lowestoft
in
Suffolk
,
East Anglia
, UK (at just 1°45′ E).
- Morocco normally observes
UTC+01:00
, but the clock is set back one hour during
Ramadan
. See
Time in Morocco
for further information.
- Whilst
de facto
Ireland operates on the same time as the United Kingdom, its
de jure
basis to do so differs. Whereas standard time in the UK is GMT in winter and
BST
(daylight saving time) in summer,
Irish Standard Time
(UTC+01:00) is observed in summer and GMT is used in winter. For details, see below.
As daylight saving time (Northern Hemisphere summer)
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Europe
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Arctic Ocean
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As standard time (year-round)
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Principal cities:
Reykjavik
,
Accra
,
Bamako
,
Dakar
,
Abidjan
,
Conakry
,
Ouagadougou
,
Sao Tome
,
Bissau
,
Monrovia
,
Bamako
,
Nouakchott
,
Freetown
,
Lome
,
El Aaiun (Laayoune)
,
Tifariti
,
Tindouf
Africa
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West Africa
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Greenwich Mean Time
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- Burkina Faso
- Ivory Coast
- The Gambia
- Ghana
- Guinea
- Guinea-Bissau
- Liberia
- Mali
- Mauritania
- Sahrawi Arab Democratic Republic
(disputed territory)
- Sao Tome and Principe (since 2018)
- Senegal
- Sierra Leone
- Togo
Europe (and possessions)
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Atlantic islands
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- Greenland
- Iceland
- United Kingdom
Antarctica
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Some bases in
Antarctica
.
Notes:
- The westernmost point where UTC with no DST is applied is
Bjargtangar
, at the northwest peninsula of
Iceland
(24°32′ W). Time used there is 1 hour and 38 minutes ahead of physical time. This is the greatest deviation from physical time for UTC+00:00 with no DST.
Discrepancies between use of UTC+00:00 as standard time rather than local solar time
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Colour
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Legal time vs local mean time
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1 h ± 30 m behind
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0 h ± 30 m
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1 h ± 30 m ahead
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2 h ± 30 m ahead
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3 h ± 30 m ahead
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Since legal, political, social and economic criteria, in addition to physical or geographical criteria, are used in the drawing of time zones, actual time zones do not precisely adhere to meridian lines. The UTC+00:00 time zone, were it determined purely by
longitude
, would consist of the area between meridians 7°30′W and 7°30′E. However, in much of Western and Central Europe, despite lying between those two meridians, UTC+01:00 is used; similarly, there are European areas that use UTC, even though their physical time zone is
UTC?01:00
(e.g. most of Portugal), or
UTC?02:00
(the westernmost part of Iceland). Because the UTC+00:00 time zone in Europe is at its western edge,
Lowestoft
in the United Kingdom, at only 1°45′E, is the easternmost settlement in Europe in which UTC+00:00 is applied.
Countries and areas west of 22°30′W ("physical" UTC?02:00) that use UTC+00:00
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- The westernmost part of Iceland, including the northwest
peninsula
(the Westfjords) and its main town of
Isafjorður
, which is west of 22°30′W, uses UTC+00:00.
Bjargtangar
, Iceland is the westernmost point in which UTC is applied.
Countries and areas west of 7°30′W ("physical" UTC?01:00) that use UTC+00:00
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In Europe
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- Canary Islands
(Spain)
- Most of Portugal, including
Lisbon
,
Porto
,
Braga
,
Aveiro
, and
Coimbra
. (Only the easternmost part, including cities such as
Braganca
and
Guarda
, lies east of 7°30′W.)
Madeira
, at 17°W even further west, also employs UTC+00:00.
- The western half of Ireland, including the cities of
Cork
,
Limerick
, and
Galway
- Westernmost tip of
Northern Ireland
, including the county town of
County Fermanagh
,
Enniskillen
- Extreme westerly portion of the
Outer Hebrides
, in the west of
Scotland
; for instance,
Vatersay
, an inhabited island and the westernmost settlement of
Great Britain
, lies at 7°54′W. If
uninhabited islands
or rocks are taken into account
St Kilda
, west of the Outer Hebrides, at 8°58′W, and
Rockall
, at 13°41′W, should be included.
- Westernmost island of the
Faroe Islands
(autonomous region of Denmark),
Mykines
- Most of Iceland, including
Reykjavik
- Northeastern part of
Greenland
, including
Danmarkshavn
In Africa
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- Liberia
- Sierra Leone
- Guinea
- Guinea-Bissau
- Senegal
- The Gambia
- Sahrawi Arab Democratic Republic
(disputed territory)
- Most of Mauritania
- Southwesternmost part of Mali
- The very westernmost part of Ivory Coast
Countries that use UTC+01:00 as the basis for standard time although local solar time would suggest UTC+00:00
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Countries between meridians 7°30′W and 7°30′E ("physical" UTC+00:00) that use UTC+01:00
In Europe
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- Spain (except for the Canary Islands, which use UTC+00:00). Much of
Galicia
(and far western fringes of
Extremadura
and
Andalusia
) lie west of 7°30′W ("physical" UTC?01:00), whereas there is no Spanish territory that even approaches 7°30′E (the boundary of "physical" UTC+01:00). Spain's time is the direct result of
Generalissimo Franco
's presidential order (published in
Boletin Oficial del Estado
of 8 March 1940)
[2]
abandoning Greenwich Mean Time and advancing clocks one hour, effective from 23:00 on 16 March 1940. This is an excellent example of political criteria used in the drawing of time zones: the time change was passed "in consideration of the convenience from the national time marching in step according to that of other European countries".
[3]
[4]
The presidential order (most likely enacted to be in synchrony with
Nazi Germany
and
Fascist Italy
, with which the
Franco regime
was unofficially allied) included in its 5th article a provision for its future phase out,
[4]
which never took place. Due to this political decision, Spain is two hours ahead of its
local mean time
during the summer, one hour ahead in winter.
[5]
- Andorra
- Belgium
- Most of France, including the cities of
Paris
,
Marseille
and
Lyon
. Only small parts of
Alsace
,
Lorraine
and
Provence
are east of 7°30′E ("physical" UTC+1).
- Ireland (
Irish Standard Time
is used in summer,
[6]
GMT in winter:
[7]
this is the reverse of the usual convention, but provides the same end results. See
Time in the Republic of Ireland
).
- Luxembourg
- Monaco
- Netherlands
- Gibraltar
(United Kingdom)
- The very westernmost part of Germany
- Westernmost part of Switzerland
- The very northwesternmost part of Italy
- Bouvet Island
and southwesternmost part of Norway
In Africa
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- Benin
- Annobon
Island (Equatorial Guinea)
- Western part of Niger
- Western part of Nigeria, including
Lagos
- Most of Algeria, including
Algiers
- Northeastern part of Morocco. Morocco normally uses UTC+01:00 but, in 2019, the country adopted UTC+00:00 during the month of
Ramadan
.
[8]
See also
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References
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External links
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- Media related to
UTC±00:00
at Wikimedia Commons