Daylight saving time sleep: how to keep your rest and energy when the clocks go back

Our fitness coach · September 27, 2026

Alarm clock on a bedside table on an autumn morning — daylight saving time and sleep

Daylight saving time sleep changes feel like a gift: the clocks go back and you get an “extra” hour. But your internal clock doesn’t shift as easily as the hands on the wall. Here is how to get through that week without groggy mornings and early-evening sleepiness.

Daylight saving time sleep shifts seem like a bonus when the clocks go back: you gain an extra hour overnight. But your biological clock doesn’t switch with one turn of the hands — according to the Sleep Foundation, getting used to the new schedule can take a week or more. Not every country changes its clocks (Kazakhstan, for example, doesn’t), but the topic is familiar to anyone living in the US, the UK or Europe, flying there often, or working with colleagues abroad.

What are the daylight saving time sleep effects?

The main challenge isn’t the “extra” hour itself but the gap between your internal rhythm and the time on the clock. For several days your body runs on the old schedule, so many people wake before the alarm and feel sleepy early in the evening.

Mornings get light earlier, and early light may wake you before your alarm goes off.
Evenings get dark earlier, and specialists at Mass General Brigham note that the sleep hormone melatonin starts to rise closer to dinnertime after the change.
If you’re already short on sleep, one extra hour won’t pay off your “sleep debt” — a point the Sleep Foundation also makes.

What should you do a few days before the clocks go back?

It’s best to start early and in small steps. For a few evenings before the change, go to bed and get up a little later than usual, and in the first days eat dinner about an hour earlier — steps recommended by Mass General Brigham. Keep coffee and strong tea before 2–3 p.m.: caffeine can stay in your system for more than 10 hours.

Daylight saving time sleep adjustment tips for the first week

In the morning, get outside into daylight, even for a short walk — more in our article Morning light.
In the evening, don’t sit in dim light too early: bright light in the early evening helps you avoid “switching off” at nine, and a sleep mask helps you avoid waking at dawn.
If you’re also flying across time zones that week, the tips in our article Jet lag will come in handy.

A gentle evening ritual helps your body trust the new time faster: dim lights, a warm shower, a book instead of the news feed — you’ll find ideas in our article Evening rituals for sound sleep. Many people add the Silent Nights patch to it — according to the company, it is designed to support relaxation and sleep and contains no melatonin. And the morning can start with Cellergize Morning, a drink with vitamins and minerals, as part of a calm, predictable start to the day.

Questions and answers

How long does it take to adjust to the clock change?

For many people it takes a few days, but for some it takes a week or longer. A consistent wake-up time, daylight in the morning and a calm evening all help.

Can I just sleep in during the “extra” hour?

The extra hour is pleasant, but it won’t make up for accumulated sleep loss. It’s better to go to bed at your usual time and keep a steady routine afterward.

Why do I wake up too early after the clocks change?

Your body keeps living on the “old” time for a while, and mornings get light earlier. Blackout curtains or a sleep mask, plus a slightly brighter evening, help shift your rhythm.