British Summer Time officially starts in the early hours of Sunday morning, March 29, meaning we will get an extra hour of sunlight.
In the UK the clocks go forward an hour at 1am on the last Sunday in March, and back 1 hour at 2am on the last Sunday in October.
The period when the clocks are 1 hour ahead is called British Summer Time (BST). There’s more daylight in the evenings and less in the mornings (sometimes called Daylight Saving Time).
When the clocks go back, the UK is on Greenwich Mean Time (GMT).
Computers, phones and tablets will change automatically while you will need to change most watch, analogue clocks, cookers and other appliances with clocks in your home.
William Willett, great-great grandfather of Colplay's Chris Martin whose band's hits include Clocks, was one of the earliest campaigners for the change - so that he could play golf later into the evenings.
The change became law under the Summer Time Act 1916 to save energy costs in World War One.
The EU has voted to scrap the change, which the UK will probably keep after Brexit, meaning there could be a time difference between Northern Ireland and Ireland.
The clocks will Fall Back on October 25 this year.
