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The Guardian - UK
The Guardian - UK
National
Martin Belam

When do the clocks change in the UK – and what started the annual ritual?

A person walks past a clock.
BST owes its origins to fuel-saving efforts during the first world war. Photograph: Jeff Pachoud/AFP/Getty Images

British Summer Time (BST) begins once again at 1.00am on Sunday 27 March, when you are obliged to put your clock forward by an hour to 2.00am. Not only do you lose an hour’s sleep, you also get to spend thirty minutes once you are awake on a Sunday morning trying to work out how to change the clock on the microwave and the washing machine if you have them.

The ritual owes its origins in the UK to the first world war. The annual hourly changing of the clock was first established in the UK more than 100 years ago under the Summer Time Act 1916, with the thought that lighter evenings might preserve fuel for the war effort.

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