Clocks Go Back UK: How to Adjust Your Sleep

On paper, the autumn change is the easy one. You gain an hour, the mornings get lighter and nobody has to drag themselves out of bed in the dark for a while. In reality, plenty of us spend the following week wide awake at 5.30am, yawning at 9pm and wondering why a single hour feels so big. Here is what is going on, and a simple plan to move across smoothly.

What Actually Happens When the Clocks Go Back?

At 2am on the last Sunday of October, the time jumps back to 1am. According to the official GOV.UK clock dates, this marks the end of British Summer Time (BST) and the return to Greenwich Mean Time (GMT) for the winter. The clocks then go forward again in late March.

Your phone, laptop and smart speaker will update by themselves. The oven, the car dashboard and that old bedside alarm will not, so change those before bed on Saturday to avoid confusion on Sunday morning.

There is some good news hidden in here. The American Academy of Sleep Medicine says that standard time, which is what GMT is for the UK, is the setting that best suits the body's natural rhythm. In its 2020 statement, lead author Dr M. Adeel Rishi said permanent standard time is the closest match to our sleep-wake cycle, mainly because it gives us brighter mornings. So the autumn change moves you towards a schedule your body tends to prefer. It just takes a few days to get there.

Why the "Extra Hour" Often Doesn't Feel Like One

Your body runs on its own internal timer, often called the body clock or circadian rhythm. It does not know the time has changed. On Sunday night, when the clock says 10pm, your body still thinks it is 11pm. On Monday morning, when the clock says 6am, your body thinks it is 7am and may decide it is time to get up.

That is why the extra hour of sleep is often more theory than reality. Writing for Harvard Health Publishing on the autumn time change, Dr Anthony Komaroff noted that only a minority of people actually get that promised hour. He points to a review by sleep researcher Dr Yvonne Harrison of Liverpool John Moores University, which concluded that a one-hour shift can unsettle sleep for up to a week. Sleep physician Dr Nathaniel Watson puts it neatly: the time change is "kind of a society imposed jet lag".

Who Struggles With the Change?

Who	What usually happens
Early risers	Harvard Health names morning "larks" as the group that finds the change hardest. If you already wake before your alarm, expect to wake even earlier for a few days.
People short on sleep	The same article says those sleeping under about 7.5 hours a night struggle more, as they have less in reserve.
Babies, toddlers and pets	They live by their body clocks, not the kitchen clock. Breakfast demands an hour "early" are very common in the first week.
Night shift workers	A shift that runs through 2am on Sunday 25 October is one hour longer by the clock. Plan your rest before and after it.

A Simple Plan for the Week Before and After

You do not need to overhaul your life for one hour. Small, steady nudges work better than one big jump. This plan is based on the tips shared by the American Academy of Sleep Medicine's Sleep Education advice on the autumn time change.

1. Monday 19 to Saturday 24 October

   Move Bedtime and Wake-Up Time a Little Later

   If your days allow it, go to bed and get up 10 to 15 minutes later each day. By Saturday you will be about an hour later than usual, which lines up with GMT the moment the clocks change. Here is how it looks for someone who normally sleeps at 10pm:

   Monday	10:10pm
   Tuesday	10:20pm
   Wednesday	10:30pm
   Thursday	10:40pm
   Friday	10:50pm
   Saturday	11:00pm (feels like 10pm GMT)

   Shift your wake-up time by the same amount each morning. If work or the school run makes that impossible, even two or three days of nudging helps.

2. Saturday night

   Go to Bed at Your Normal Time

   The temptation is to stay up late because "we get an extra hour". Sleep Education calls this one of the biggest mistakes people make. Head to bed at your usual time, let the clocks change while you sleep, and bank the hour as actual rest.

3. Sunday 25 October

   Get Daylight Early, Then Live on the New Time

   Sleep Education points out that morning sunlight helps your body sync to a new schedule. Open the curtains as soon as you are up, have breakfast by a window or go for a short walk. Then eat lunch and dinner at your usual clock times, so the rest of the day pulls your body onto GMT.

4. The first week of GMT

   Hold Your Wake-Up Time Steady

   Keep your alarm fixed for seven mornings in a row, weekends included, even after a patchy night. If you flag in the afternoon, Sleep Education suggests keeping any nap to 15 to 20 minutes, as long or late naps make bedtime harder. For everything else before bed, our bedtime routine guide covers caffeine, screens and bedroom setup in more detail.

Waking Too Early? How to Handle the Lighter Mornings

After the change, sunrise arrives an hour earlier by the clock. If light creeping around the curtains is enough to wake you, it can undo all your good work.

Sleep specialist Dr Charles Czeisler of Brigham and Women's Hospital, speaking to Mass General Brigham about adjusting to clock changes, suggests wearing a sleep mask so the earlier sunrise does not cut into your sleep. Heavier curtains, or a roller blind behind them, also cut out that early glow. If you share a room or the gaps around the window are hard to fix, an easy answer is to wear a silk sleep mask that keeps dawn light off your eyes.

If you do wake at 5am, try not to check the time on your phone. Lie quietly in the dark for a while. If sleep does not come back, get up at a reasonable hour and keep to your plan rather than trying to catch up with a lie-in.

Darker Evenings and Your Mood

The flip side of lighter mornings is that it gets dark much earlier in the afternoon. For many people this is just a bit gloomy. For some it makes the winter feel heavy.

Light still matters here. Dr Czeisler notes that bright white light in the evening can help the body clock move later, which is useful if you find yourself drowsy far too early. Keep rooms well lit in the early evening, then dim the lights as bedtime gets close.

During the day, the NHS recommends getting as much natural daylight as you can, staying active and keeping a regular sleep pattern. If low mood comes back every winter and stays for weeks, read the NHS page on seasonal affective disorder and book a chat with your GP. That is a real condition with real support, not something to push through alone.

Using Sleep Patches Around the Clock Change

Already wearing our botanical sleep patches at night? Then the clock change needs no extra steps. Simply keep applying your patch at your usual bedtime by the new clock. Wear one overnight and peel it off in the morning, just as you would any other night.

For anyone thinking of trying them, here are the facts. Each one is a slim adhesive sticker, and the pack lists seven ingredients: valerian root, lavender, hops, passion flower, L-tryptophan, 5-HTP and magnesium. Melatonin is not one of them. Many people use a patch as one calm step in their wind-down, alongside dim lights and a book. If you want the background first, our article on sleep patch ingredients walks through each one.

We wrote this as everyday guidance on settling into GMT, not as medical advice. Sleep that stays broken for weeks, or that leaves you struggling through the day, is worth raising with your GP.