When the clocks go back: a few-day sleep plan for darker evenings

On 25 October 2026 the UK moved its clocks back one hour, and on 1 November the US follows. The change comes with an extra hour in bed, which sounds like a gift, and a darker evening, which is the part people notice. Between them is a body clock that does not read the wall clock.

This guide pulls together what the American Academy of Sleep Medicine (AASM) suggests for the fall change, adds a few days of practical routine, and covers the part the sleep advice skips: what to do about walking when it is dark at five.

The dates

GOV.UK says UK clocks go back one hour at 2am on the last Sunday in October, which in 2026 is Sunday 25 October. NIST says US daylight saving time ends at 2am local time on the first Sunday in November, which is 1 November 2026. Phones and most connected devices change themselves, but a watch, an oven or a car clock needs doing by hand.

What the AASM suggests

The AASM publishes tips for the move between standard time and daylight saving time. For the fall change they come down to six points:

1. Sleep enough around the change. Aim for at least seven hours a night for adults (eight for teens), before and after.
2. Shift gradually. A few nights before the fall change, move your bedtime 15 to 20 minutes later each night. If you already get too little sleep, do not shift later; take the extra hour on the night itself.
3. Move other routines too. Adjust mealtimes to match the new schedule before the change.
4. Set clocks on Saturday evening. Then go to bed at your normal bedtime.
5. Use light and darkness. In the fall, minimise light exposure until your target morning wake time.
6. Protect Sunday night. Get plenty of sleep so you start the week rested.

The AASM also says standard time, the time we return to in the fall, is best aligned with human circadian biology, and that it supports permanent standard time. That is its position, not a settled legal question; the rules still depend on where you live.

A simple few-day plan

The AASM points are the frame. Here is how we would lay them over a normal week. The timings are our own suggestion, not a medical protocol.

The NHS adds general sleep habits that help whatever the clock says: keep to regular times, make the bedroom quiet, dark and cool, and avoid heavy meals, caffeine and alcohol close to bedtime. Our guide to the right room temperature for deeper sleep covers the cool part.

Daylight is the lever you control

Because your body clock follows light, the first hour after you wake is worth using. Our guide to morning daylight and sleep explains how to get outdoor light without burning, and the best time to walk for better sleep compares morning, afternoon and evening. If the first weeks are grey and wet, keeping a daylight walk when it rains has the routine for it. If you also travel across time zones, the jet lag daylight plan uses the same idea.

When the walk moves into the dark

After the change, an evening walk that used to finish in daylight may now start in the dark. That is a safety issue, not a sleep one, and it is easy to solve: wear something light or reflective, carry a small light, and stay on lit routes. If rain is likely, a compact umbrella with reflective detail helps drivers see you. Calm Eden’s guide to reflective umbrellas and night visibility goes through what reflective strips do and do not do, and its Haven Umbrella lists reflective strips. Lumuwala and Calm Eden share an owner, which makes that guide our own writing rather than outside advice.

If you are still off after a week

The AASM does not give a fixed number of days for adjustment. If you are still waking at the wrong hour or feel tired well beyond a week, look at the usual suspects first: light late in the evening, caffeine, an irregular wake time. Our guide to why you wake up at 3 a.m. is a good place to begin, and a doctor or pharmacist can help if the problem continues.

A one-page checklist

1. Know your date: 25 October in the UK, 1 November in the US.
2. Do not change bedtime if you are short on sleep.
3. Set clocks on Saturday evening and keep your normal bedtime.
4. Keep light low until your target wake time, then step outside.
5. Move mealtimes to the new clock.
6. Plan reflective or lit gear for evening walks.

Sources: GOV.UK, When do the clocks change?, NIST, Daylight Saving Time, AASM Sleep Education, Daylight Saving Time and NHS Every Mind Matters, How to fall asleep faster and sleep better, all checked 25 October 2026. The day-by-day table and the walking suggestions are ours. This guide is general information, not medical advice; if sleep problems last, talk to a doctor or pharmacist.