Ease into the clock change

Daylight saving sleep adjuster: ease into the clock change

Twice a year, many countries move the clocks by an hour, and for a few days many of us feel it. The "spring forward" change costs an hour of sleep and is the harder of the two. This daylight saving adjuster takes your usual bedtime and your region and gives you a step-by-step plan, moving bedtime by 15 minutes a day, so the clock change feels like any other morning.

People search for "daylight saving time sleep tips", "how to adjust to the time change" and "daylight savings time kids sleep". The change is small, but it falls on a fixed date and affects the whole household, particularly babies and young children whose routines are rigid.

How the adjuster works

Pick your region (United States, Europe, Australia or New Zealand) and enter your usual bedtime. The tool finds the next clock change in your region, tells you whether the clocks go forward or back, and builds a plan that moves bedtime by 10, 15 or 30 minutes a step (you choose; 15 minutes means four days of small shifts) in the days before the change. The same steps work for children, so enter their bedtime instead of yours.

Spring forward and fall back

When the clocks go forward, you lose an hour and the morning is darker for a while. Studies have linked the days after this change to slightly higher rates of heart attacks and traffic accidents, though the effects are small for most people. When the clocks go back, you gain an hour, and the main issue is waking early. In either case, shifting in small steps lets the body clock follow without a jolt.

Helping children and babies adapt

Young children do not understand the clock, they respond to light and routine. Move bedtime, naps and meals by 10 to 15 minutes every day or two for a week, or shift everything by the full hour on the first day and use blackout curtains and a calm routine. The baby wake window tool helps you keep naps in line with the new time, and the kids bedtime calculator shows how much sleep they need.

Light does most of the work

Morning light advances the body clock and evening light delays it. After the clocks go forward, get outside early to help your body adapt; after they go back, expect to feel sleepy an hour earlier and use the evening light to stay up until the new bedtime. Avoid long naps and late caffeine; the caffeine cutoff calculator and nap calculator help. Use the wind-down routine timer to keep bedtime steady.

If you live where clocks do not change

Many regions, including most of Asia, Africa and parts of the US and Australia, do not change their clocks. The tool is only offered in the menus of visitors whose time zone changes its clocks, though the page is reachable by URL. If you travel across a time zone border or fly to a different region, the jet lag planner will serve you better.

Check your devices and your sleep

Phones, watches and most smart devices update automatically, but check any alarm clocks and car dashboards. If you use a sleep tracker or app, note how your sleep timing shifts in the week around the change. Wearables like the Apple Watch update to local time on their own, as covered in our Apple Watch sleep tracker guide. A sleep diary will show whether you have recovered.

Example plan for spring forward

If your usual bedtime is 10:30 PM, the clocks go forward on Sunday and you use 15-minute steps, you would go to bed at 10:15 PM on Wednesday, 10:00 PM on Thursday, 9:45 PM on Friday and 9:30 PM on Saturday. On Sunday night, 10:30 PM on the new clock feels like 9:30 PM on the old one, which your body has already got used to, so you can go back to your normal bedtime. The tool shows the exact dates for your region and bedtime.

The long-term debate

Sleep scientists and medical societies have called for permanent standard time rather than switching back and forth, arguing that it matches the body clock better. Politicians have disagreed, and rules vary by country and sometimes by state. Until a change is made, a small plan like this one is the practical response.

Pets, shift workers and early risers

Pets keep to their own clocks and may wake you an hour early. Shift workers on the night of the change may work an hour more or less, so check how your employer handles it. Early risers may find the spring change easier, because their body clock is already ahead, while night owls find it harder.

Health effects of the clock change

Studies of the days after the spring change report small rises in sleepiness, workplace injuries and road accidents, and some data suggest a short-term rise in heart attacks. The autumn change appears to have smaller effects. These findings are averages across large populations and do not mean any single person is in danger. They do suggest that a few days of care, such as extra sleep and cautious driving, are sensible.

Helping teenagers and night owls

Teenagers and night owls already run late, and losing an hour in spring hits them hardest. Encourage morning light, protect an earlier bedtime for a week and limit caffeine. In autumn, they may enjoy the extra hour, though it can feel like it delays everything even further. A steady wake-up time throughout is the best protection. The school-night bedtime tool can help them see the numbers.

Frequently asked questions