Daylight saving and baby sleep: fall back and spring forward

In the US, clocks fall back an hour at 2:00 am on Sunday, November 1, 2026 (the UK and most of Europe changed on October 25). Your baby’s body clock does not move with them. For a few days, a baby who usually wakes at 7:00 am tends to wake around 6:00 am on the new clock and gets tired an hour earlier through the day. You can absorb that hour gradually, 15 minutes a night over the four nights before, or switch on the day and let the body catch up over two or three days.

What actually changes for your baby?

The wall clock moves an hour in one night. The body clock, which runs on light and routine, takes a few days to follow.

When the clocks fall back, your baby’s body is still on the old time. Tired at 6:00 pm on the new clock is the old 7:00 pm, and the old 7:00 am wake-up now reads 6:00 am. The early start pushes the first nap earlier, which stretches the last stretch of the day before bed. Many parents expect an extra hour of sleep and get the opposite. Left alone, that early-morning cycle can last weeks.

When the clocks spring forward, it runs the other way. Bedtime arrives when your baby’s body still thinks it is an hour earlier, so falling asleep takes longer, and mornings start late. People of every age tend to feel alert just before their usual bedtime, which is why a sudden hour-earlier bedtime is the harder ask.

Babies younger than about 3 to 4 months are the exception. Their body clock is still forming: a daily rhythm in melatonin, the sleep hormone, typically appears somewhere between 9 and 15 weeks of age, and sleep spreads across day and night in wake windows until then. With little to reset, the change barely registers.

Two ways to move the day

Neither is the right one. Pick the one that fits your week.

The gradual route. Starting on the Wednesday night before the change, move bedtime 15 minutes a night, and let the morning and the naps move with it. By Sunday, the usual times on the new clock are where your baby’s body already is. For fall back the day moves later; for spring forward, earlier.

Fall back, 15 minutes a night

Wednesday 7:00 pm → 7:15 pm

Thursday 7:00 pm → 7:30 pm

Friday 7:00 pm → 7:45 pm

Saturday 7:00 pm → 8:00 pm

Sunday new clock 7:00 pm

Bedtime, with the morning and naps moving the same way. Example: a usual 7:00 pm bedtime.

Here is the same plan with a 7:00 pm bedtime and a 7:00 am wake-up:

Each morning moves by the same 15 minutes as the night before it, and so do the naps.

The quick route. Go by the new clock from Sunday: keep your baby up to the usual bedtime and hold naps to their usual length. If a full hour is too much at once, meet it halfway for two or three days (bedtime 30 minutes off the usual time), then take the full hour. Most babies settle onto the new clock within a few days this way.

If your baby is 4 months or older, you can also wake them at the usual time on the new clock, which resets the day from its first hour. Under 4 months, let a sleeping baby sleep.

Light does most of the work

Light reaching the eyes is the body clock’s main signal. Bright light in the evening pushes sleep later; bright light in the morning pulls it earlier. Midday light does little either way.

For fall back, aim for about an hour of bright light in the late afternoon or early evening, outdoors if you can, until your baby sleeps to the usual time. Keep mornings dark and the start of the day low-key until the target wake time. Early light reaches a baby through closed eyelids, so blackout blinds in the bedroom help a lot. A hungry baby is fed whatever the clock says.

For spring forward, the reverse: bright light soon after waking, ideally outside, and a dim, screen-free hour before bed.

The clock change can fix a timing problem

Sometimes the change does you a favor. If your baby wakes at 4:00 to 5:00 am, keeping the schedule exactly as it is through spring forward turns that into a 5:00 to 5:30 am start, and a 6:00 pm bedtime becomes 7:00 pm. In the fall, a bedtime that has crept to 9:00 pm becomes 8:00 pm overnight if you leave it where it is on the body clock.

Where the advice differs. Advice on the clock change runs from moving the day 15 minutes a night over the four nights before, to switching on the day and letting the body catch up over two or three days. One view holds that early waking after fall back lasts weeks unless evenings get bright light, while others expect most babies to adjust within a few days. tiho starts with the gradual route and adjusts from your baby’s own log.

What to expect in the first week

• Fall back: a few early mornings, naps that want to come earlier, and a tired stretch before bed. Shorten the last stretch of the day a little if your baby is struggling, rather than pushing through.
• Spring forward: a longer settle at bedtime for a few nights and a later start in the morning.
• Both: a slightly off week. Judge the change by the second week, not by the first two nights.

tiho’s Clock change card on Today explains what each day of the change means for your baby, and on tiho+ the plan moves your baby’s day 15 minutes a night over the four nights before, naps and all, so the usual times fit the new clock on Sunday. You can turn the move off.

When to talk to your pediatrician

A clock change on its own does not need a doctor. If your baby’s sleep is still very off two weeks later, or if you see other signs such as fever, poor feeding or unusual sleepiness, check in with your pediatrician, since something other than the clock is likely at play.

Related reading

• Wake windows by age: the cheat sheet, for what to follow when the clock is no help.
• Why your baby only naps 30 minutes, if the change leaves naps short.