Time in the United Kingdom
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The United Kingdom uses British Standard Time (UTC) and British Summer Time (UTC+1).
The UK used Local Mean Time until railway timetabling gradually established the two standards of Greenwich Mean Time and Dublin Mean Time (UTC-0:25). These were legally adopted in 1880. In 1916, Greenwich Mean Time was introduced to Ireland, and British Summer Time was introduced.
At the beginning of the 20th century Sandringham Time (UTC+0:30) was used by the royal household.
Regulation of time zones and Summer Time is a reserved matter, meaning that only in the Parliament of the United Kingdom has power to legislate, rather than devolved administrations such as the Scottish Parliament.
