When do the clocks change?

The clocks go back 25 October

Year Clocks go forward Clocks go back 2017 26 March 29 October 2018 25 March 28 October 2019 31 March 27 October 2020 29 March 25 October 2021 28 March 31 October

In the UK the clocks go forward 1 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).