In the early hours of Sunday morning the clocks will go back by one hour as daylight saving time replaces British summer time.
Turning the time back every October makes the evenings much shorter during the winter months – unlike in the summer when Brits are able to enjoy an extra hour of sunlight during the longer, warmer days – but allows for brighter mornings.
This year the clocks will go back on Sunday October 25. When the time reaches 2am, the UK will return to 1am.
The act of turning the clocks back an hour in October has been a regular activity since the years of World War One.
These days many smart devices such as phones, TVs and tablets automatically reset, but analogue clocks, watches and other appliances will need winding back.
Do other countries change the time?
It’s not just the UK that puts their clocks back every autumn.
All European countries, except for Belarus and Iceland, use daylight saving time during the winter months, switching their time on the same night as the UK.
Countries such as France and Spain that are on GMT+1 go back at 3am local time (2am in the UK), meaning the UK always remains an hour behind.
However, that could change as early as next year after the European Parliament voted in 2019 to scrap daylight saving time and stop winding clocks twice a year.
Although member nations have not yet ratified the changes, it could mean a permanent time zone in Europe from 2021 or 2022.
If the UK continues to put the time back by 60 minutes every October and forward again five months later, it could lead to Britain spending half the year on the same time as Europe and the rest of the time an hour behind.
Further afield, the United States winds its clocks back a week after the UK and Europe on the first Sunday in November, meaning that for one week the country is an extra hour further back.
This year the US will put its clocks back on Sunday November 1.
On the other side of the world, New Zealand put its clocks forward on September 27 to move into daylight saving time, following a week later by the Australian states of New South Wales, Victoria, Tasmania, Australian Capital Territory, Jervis Bay Territory and South Australia.
One country that has stopped changing the time is Russia.
In 2011 the country switched to permanently be on the summer daylight saving time, but that proved unpopular with some parts of the country saying they had fewer hours of sunlight that before – particularly in winter – and more early morning road accidents.
Three years later Russians wound their clocks back to winter time, which has remained ever since.