It's that time of year again, when we all struggle to remember if the clocks go forward or back. So here's everything you need to know about the autumn time change so that you don't accidentally arrive at work an hour early.
When do the clocks go back?
This weekend! On Sunday, October 30 at 2am, the UK will revert to Greenwich Mean Time (GMT) by going back one hour, to 1am. This marks the official end of British summertime. A clever way to remember the hour-change rule is "Spring forward, Fall back". Easy!
Will I get a lie in?
Yes. Relish those extra 60 minutes in bed. The mornings will also be lighter, however the evenings will be darker.
(However, despite the prevalence of smartphones and other devices which alter the time for you automatically, there will always be one person you know who didn't get the memo.)
How dark does the UK get in winter?
In the UK, the maximum 16 hours and 50 minutes of sunlight - on the longest day in June (the summer solstice) - dwindles to just seven hours and 40 minutes six months later in December (the winter solstice).
When will the infernal darkness end..?
We won't see lighter nights again until March 26th 2017, when the clocks will wind forward again at 1am, and British Summer Time begins.
Hibernation for the nation?
October 30 is the day Britons go into "hibernation" mode, according to a new study. Researchers have discovered almost half of us (42 per cent) will batten down the hatches for the winter as the nights draw in.
Stocking up on new winter socks (31 per cent), slippers (21 per cent) and woolly jumpers (29 per cent) – is all part of the human hibernation process, according to the study.
A further 33 per cent said they start preparing for winter by doing a “winter food shop”, with more than one in ten (12 per cent) saying October 30 is the day they stock up on wine and beer to get them through the winter months.
Daylight Saving: Whose idea was it?
A man called William Willett introduced the idea of British Summer Time, also known as Daylight Saving Time, in 1907. He wanted to prevent people from wasting valuable hours of light during summer mornings.
He published a pamphlet called 'The Waste of Daylight' in a bid to get people out of bed earlier by changing the nation’s clocks.
Willett proposed that the clocks should be advanced by 80 minutes in four incremental steps during April and reversed the same way during September.
By then Britain and Germany had been fighting each other in the First World War (1914-18), and a system that could take pressure off the economy was worth trying.
The Summer Time Act of 1916 was quickly passed by Parliament and the first day of British Summer Time, 21 May 1916, was widely reported in the press.
Back then the hands on many of the clocks could not be turned back without breaking the mechanism.
Instead, owners had to put the clock forward by 11 hours when Summer Time came to an end on October 1 2016.
The Home Office put out special posters telling people how to reset their clocks to GMT, and national newspapers also gave advice.
What's the reason for turning the clocks back?
Supporters for the proposal argued that such a scheme could reduce domestic coal consumption and increase the supplies available for manufacturing and the war effort during the First World War.
The idea was not a new one, however. In 1895 an entomologist (or insect expert) in New Zealand, George Vernon Hudson, came up with the idea to the Wellington Philosophical Society outlining a daylight saving scheme which was trialled successfully in the country in 1927.
Willett, who died at his home near near Bromley in Kent, is commemorated for his efforts by a memorial sundial in nearby Petts Wood, set permanently to Daylight Saving Time.