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The United Kingdom uses Greenwich Mean Time (also known as Western European Time or UTC) and British Summer Time (also known as Western European Summer Time). History [ edit ] Until the advent of the railways, the United Kingdom used local mean time .
Time zone. Greenwich Mean Time is defined in law as standard time in the following countries and areas, which also advance their clocks one hour (GMT+1) in summer. United Kingdom, where the summer time is called British Summer Time (BST) Ireland, where it is called Winter Time, changing to Standard Time in summer.
A time zone is an area which observes a uniform standard time for legal, commercial and social purposes. Time zones tend to follow the boundaries between countries and their subdivisions instead of strictly following longitude, because it is convenient for areas in frequent communication to keep the same time.
Railway time. Clock on The Exchange, Bristol, showing two minute hands, one for London time ( GMT) and one for Bristol time (GMT minus 11 minutes). Railway time was the standardised time arrangement first applied by the Great Western Railway in England in November 1840, the first recorded occasion when different local mean times were ...
In the United Kingdom, the standard term for UK time when advanced by one hour is British Summer Time (BST), and British English typically inserts summer into other time zone names, e.g. Central European Time (CET) becomes Central European Summer Time (CEST).
British Summer Time; Time zone: UTC offset; UTC: UTC+01:00: Current time; 08:50, 3 June 2024 GMT 09:50, 3 June 2024 BST: Observance of DST; This time zone is only used for DST. For the rest of the year, GMT is used.
Europe spans seven primary time zones (from UTC−01:00 to UTC+05:00), excluding summer time offsets (five of them can be seen on the map, with one further-western zone containing the Azores, and one further-eastern zone spanning the European part of Kazakhstan).
This is a list of time zone abbreviations. Time zones are often represented by alphabetic abbreviations such as "EST", "WST", and "CST", but these are not part of the international time and date standard ISO 8601 and their use as sole designator for a time zone is discouraged.
Historically, standard time was established during the 19th century to aid weather forecasting and train travel. Applied globally in the 20th century, the geographical regions became time zones. The standard time in each time zone has come to be defined as an offset from Universal Time.
History of time in the United States. The evolution of United States standard time zone boundaries from 1919 to 2024 in five-year increments. Plaque in Chicago marking the creation of the four time zones of the continental US in 1883. Colorized 1913 time zone map of the United States, showing boundaries very different from today.