Brits will have one less hour in bed tonight unfortunately but the flip side of this means the evenings are about to get lighter.
During the change, the UK moves officially from Greenwich Mean Time (GMT) to British Summer Time (BST).
BST always begins on the last weekend in March, whereas the clocks go back every last Sunday of October.
What time do the clocks go forward tonight?
The clocks will move one hour ahead at 1am GMT on Sunday, March 25, making it 2am BST.
Mobile phones, computers and other internet-connected devices should automatically reset the time but you will need to manually change clocks, watches and some electronic alarms.
A simple way to remember how the clocks shift this month is the old saying: “Spring forward, fall back.”
Why do we change our clocks?
The tradition of moving our clocks forward by one hour is a relatively modern concept having only been introduced in the UK in 1916.
British Summer Time was proposed by a builder William Willett, who said an extra hour a day would save lighting costs and promote recreational activities.
The idea is said to have come to him while he was riding his horse one summer morning during which he noticed a large number of people’s houses with their blinds still pulled down.
Sadly Mr Willett died in 1915, a year before his idea would be formally passed into law by the UK parliament.
British Summer Time has gone through several adaptations throughout the years, even temporarily moving to British Double Summer Time (BDST) during the Second World War.
But the current arrangement has been in place by an act of parliament since 2002.
Other countries also observe the custom but call it Daylight Saving Time (DST).
DST was implemented by the German Empire and Austria-Hungary in 1916.
It is observed in Europe, North America and some parts of Asia.
