When do the clocks change and why do we do it?

Yahoo

29-03-2025

Every year UK clocks undergo two changes - the first in the spring and the second in the autumn.
In spring the clocks go forward, before going back to their original time in autumn.
With signs of spring now starting to clearly appear, it is not long until we see the clocks change for the first time in 2025.
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So when exactly will the clocks change this year, and what impact will this have?
The clocks will go forward on Sunday 30 March at 1am by one hour.
This marks the UK's transition into British Summer Time (BST) where there is more daylight in the evenings and less in the mornings.
This period is also sometimes known as Daylight Saving Time.
Due to the change in the clocks, the Met Office expects sunset on Sunday for Manchester to be 7:41pm.
But the change will see darker mornings, with the Met Office expecting Manchester to see sunrise at 6:47am on Sunday morning.
As clocks go forward the UK will lose one hour from the day.
The transition to BST will also see later sunsets from Sunday for the UK - but early risers will initially notice darker mornings.
These changes could impact energy levels, as researchers have found important links between exposure to light and overall productivity.
Dr Ashleigh Johnstone, senior lecturer in psychology at Arden University, explains: 'Exposure to more natural light in spring boosts mood and energy levels as it increases our serotonin supplies – a neurotransmitter that's linked to happiness and wellbeing.
'The brighter season also helps regulate our circadian rhythms, leading to better sleep and improved alertness.'
This year the clocks will go back on Sunday 26 October at 2am by one hour.
This will mark the UK's return to Greenwich Mean Time (GMT).