How to Reset Your Sleep When the Clocks Change
Twice a year, an hour vanishes or appears overnight, and your body spends the next few days not quite sure what happened.
The clocks changing seems like a small thing, sixty minutes either way. But your internal rhythm doesn't adjust as quickly as the clock on the wall does, and that gap is why the days afterwards feel slightly out of step. The good news is that a little preparation goes a long way, and the disruption rarely lasts more than a few days if you handle it well.
Why the Clocks Changing Disrupts Your Sleep
Your body runs on an internal clock set by light and habit, and it doesn't reset itself the moment the hour officially changes on your phone. When the clocks go forward in spring, you lose an hour, and your body still wants to sleep and wake on the old schedule, so an early start feels brutal for a while.
The autumn change, where you gain an hour, sounds easier, and it is, but it still shifts your timing and can leave you waking too early for a few days. Either way, your rhythm needs time to catch up with the new clock, and trying to force it overnight rarely works. The mismatch between body time and clock time is the whole source of the problem, and it's the same mechanism behind jet lag, just on a smaller scale. Once you see it that way, the fixes make more sense, because they're all about helping your internal clock catch up with the new time as quickly as possible.
What the Science Says About Your Body Clock
The spring change is the harder of the two, and the evidence backs that up. The lost hour shortens sleep for several nights while your body clock catches up, and studies have linked the days after the spring shift to more daytime tiredness and slower reaction times. It's a small effect for most people, but a real one.
Your clock adjusts at roughly an hour a day on its own, so most people are back in rhythm within a few days, though the spring change can take a little longer to settle. Light exposure is what does the actual resetting, which is also the lever you can pull to speed the whole process up. Used at the right time of day, daylight is far more effective than simply willing yourself to feel tired.
How to Prepare for the Spring Change
You can soften the spring jump by meeting it halfway rather than taking it all in one go. In the few nights before the clocks go forward, go to bed fifteen to twenty minutes earlier each evening, so the lost hour is spread out across several days instead of landing all at once on the Sunday.
On the morning of the change, get up at the new time and get straight into bright light, ideally daylight, which tells your clock to move forward. Keep caffeine to the morning that week, since you'll be more sensitive to anything that delays sleep when you're already running short. A little discipline in the days either side makes the difference between a rough week and a barely noticeable one.
How to Prepare for the Autumn Change
The autumn change is gentler but still worth handling rather than simply ignoring. The risk here is waking too early, because your body still thinks it's an hour later than the clock now says. To ease it, push your bedtime fifteen minutes later for a few nights beforehand so you're not ready for sleep too soon.
On the morning of the change, avoid very early bright light if you're prone to waking too early, and get your daylight a little later in the morning instead. Within a few days your body settles into the new time without much fuss. Most people find the autumn shift sorts itself out quickly, as long as they resist the urge to go to bed far too early on the first night and then wake at five.
Helping the Whole Household Adjust
The clocks changing is rarely just your problem if you share a home. Children and babies feel it most, since their sleep is more tightly tied to routine, and a sudden hour's shift can throw bedtimes into chaos for a week. The same gradual approach works for them: move bedtime and meals in small steps over several days rather than expecting them to adjust overnight.
Pets keep their own time too, and an early-rising dog or a cat demanding breakfast on the old schedule can undo your careful planning. Adjusting feeding times gradually in the days beforehand helps the whole household land on the new clock together. The more of the routine you shift in advance, the less the actual changeover has to do.
Adjusting Your Bed for the New Season
There’s also the fact that the clocks changing rarely arrives on its own; it usually marks a real shift in the weather, and the bed that suited the season you're leaving often doesn't suit the one you're heading into. Spring forward and the nights warm up, so a heavy winter duvet starts to leave you too hot, which fragments sleep just as you're trying to recover that lost hour. Fall back and the opposite applies.
Switching your bedding to match is a simple way to keep your sleep environment on your side through the change. Our Simba 3-in-1 cooling duvet uses Stratos® technology that's cool to the touch and helps move heat away from you, which makes the seasonal handover easier whichever way the clocks have gone. It also comes with adjustable togs; you can snap layers on and off based on how warm you want to be.
FAQs
Spring takes an hour away, forcing you to wake earlier than your body wants to. Autumn gives an hour back, which is gentler, though it can still leave you waking too early for the first few days until you adjust.
Your body clock shifts at about an hour a day, so most people adjust within a few days. The spring change can take slightly longer because of the lost sleep that comes with it.
Go to bed fifteen to twenty minutes earlier for a few nights beforehand, then get up at the new time and into bright light on the morning of the change. Spreading the shift out is far easier than taking it all at once.
It's easier than spring, but gaining an hour can leave you waking too early for a few days. Shifting your bedtime slightly later in the nights beforehand helps smooth the transition.
It's a sensible prompt to, since the change usually comes with a shift in the weather. Matching your duvet to the new season helps you avoid overheating or getting cold, both of which disturb sleep while your clock is already adjusting.
