This year, like every other year, the clocks are set to go back an hour as the colder, winter months approach.
In the UK, the clocks go forward one hour in spring and back by one hour on the last Sunday in October at 2am.
This year it falls on October 31 - aka Halloween - and it's good news as it means we all get an extra hour in bed.
Whilst this extra hour can seem like a good thing, it might actually be the opposite. A leading sleep expert revealed how it can leave us feeling jet lagged up to a week later.
Our circadian rhythm - also known as our body clock - responds to light during the day in order to keep us awake. At night, it signals our body to produce melatonin (the sleep-promoting hormone) to help us snooze peacefully.
According to Loughborough University sleep expert, Professor Kevin Morgan, changing the clocks in autumn and spring can affect this circadian rhythm which impacts our general wellbeing.
An individual's bodily functions is said to be synchronised with the time of day and regulated by our 'body clock'. Discussing an individual's own clock, Professor Morgan said: "Clock times - from BST to GMT - change instantly, body clocks take longer to catch up."
He also suggests that we experience a one-hour 'social jet lag' each time the clocks spring forward and fall back with it being said that it feels the same as the jet lag people experience from a long-haul flight.
This form of jet-lag can last up to a week after the clocks change meaning we are likely to feel tired, hungry or wide-awake at the ‘wrong’ times and some experts suggest making your bedtime 15 or 30 minutes earlier in order to help avoid the knock-on effect.
Research from CBD brand Love Hemp reveals why the extra hour in bed may be more trick than treat this Halloween.
It seems many Brits are pro-BST too, with 59% of those surveyed saying they would prefer to stay on permanent summer time, preferring the lighter nights.
The period when the clocks are one hour ahead is called British Summer Time (BST), and when the clocks go back, the UK is on Greenwich Mean Time (GMT).
Smartphones and other devices connected to the internet should automatically update, but don't forget to manually change any clocks or watches to the correct time.
If you struggle to remember when the clocks go back or forward, just remember that the clocks 'spring' forward for the transition to summer and 'fall' back for fall - our autumn as we call it in the UK.
