The clocks will go back in the UK on Sunday, October 25, marking the end of British Summer Time (BST) and the start of Greenwich Mean Time (GMT). The change takes place one day earlier than the October 26 date seen last year.
At 2am on that Sunday, the clocks will revert to 1am, giving many people an extra hour in bed. The autumnal time change always occurs on the final Sunday in October.
Sunset times after the change
Once the clocks change, much of the UK can expect pre-5pm sunsets. London will see the sun set at 4.46pm on October 25, while Edinburgh can expect sunset at around 4.48pm.
Cardiff will see the sun set at 4.59pm, and Belfast will experience its first pre-5pm sunset of the season at 4.58pm on Tuesday, October 27.
History of British Summer Time
British Summer Time was first formally proposed by campaigner William Willett in 1907. He laid out his vision in a self-published pamphlet called "The Waste of Daylight", according to Royal Museums Greenwich.
Germany became the first nation to implement daylight saving time in 1916, with the UK following shortly after during World War I.
Next year's dates
In 2027, BST will begin again on Sunday, March 28, before the clocks go back on Sunday, October 31.
