Western European Time

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Western European Time (WET, UTC+0) is the time zone covering parts of western and northwestern Europe, including the following countries and regions:

Canary Islands, since 1946 (rest of Spain is CET, i.e. UTC+1)
Faroe Islands, since 1908
northeastern Greenland (Danmarkshavn and surrounding area)
Iceland, since 1968
Portugal, since 1911 with pauses (except Azores, UTC-1)
The Republic of Ireland (where the term GMT is used), since 1916 with pauses
The United Kingdom (including England, Northern Ireland, Scotland and Wales plus the Isle of Man and the Channel Islands, where the term GMT is used), since 1847 in England, since 1916 in Northern Ireland with pauses

During winter months, the countries above use WET, which corresponds to Universal Time (UTC); however in the summer, most (but not all) of the above places move one hour ahead to Western European Summer Time (UTC+1). Officially the Republic of Ireland is on UTC+1, but goes to UTC in winter, and for all practical purposes uses the same time as the United Kingdom. There have been calls recently for the UK, particularly England and Wales, to change to CET.[1][2]

This time zone (GMT) was used in:

Andorra in years 1901-46
Belgium in years 1892-1914 and 1919-1940
France in years 1911-40 and 1944-45
Gibraltar in years 1880-1957
Luxembourg in years 1918-40
Monaco in years 1911-45

In the United Kingdom and the Republic of Ireland in years 1940-45 British Summer Time (BST=CET) was used in winters and British Double Summer Time (BDST=CEST) in summers. Between 18 February 1968 and 31 October 1971 BST was used all year.

In Portugal in years 1966-1976 and 1992-96 CET was used.

UTC (sometimes called Zulu time or Z time and formerly called Greenwich Mean Time) also covers part of west Africa: