When Does British Summer Time Start 2025. Next year, in 2025 the clocks will go forward on sunday, march 30, by an hour and they’ll go back by an hour on sunday 26 october. Countdown to british summer time begins clocks go forward in the uk countdown to 31st march 2025 at 1:00am (europe/london time)

British summer time has a complex history, starting with world war i and undergoing several. Learn more about why the uk changes the clocks and the history of daylight.