When do the clocks go forward? Why does this happen? Whose idea was it?
PUBLISHED: 09:14 24 March 2017 | UPDATED: 09:14 24 March 2017
Daylight Saving Time was created to stop British people wasting sunlight hours
On March 26 at 1am the clocks will go forward meaning everyone will lose an hour of sleep, but gain an hour of sunlight.
In October, Greenwich Mean Time - the average solar time - will go back to normal again, meaning the clocks will go back an hour and everyone will gain sleep.
Daylight Saving Time was created with the aim of stopping British people wasting sunlight hours by sleeping, and was invented by William Willett a builder who spent most of his life living in Chislehurst.
According to the William Willett Learning Trust, using his own financial resources, in 1907 Mr Willett made leaflets promoting his idea, which he claimed would save £2.5 million in lighting costs.
The Summer Time Act of 1916 was passed by parliament and the first day of British summer was reported as May 21, 1916. It has been in place ever since.
Mr Willett is remembered by a memorial sundial in Petts Wood, Bromley.