Twice a year a single hour shifts the whole family routine. For adults the clock change is a question of two tired days – for children the entire rhythm hangs on it: falling asleep, waking up, the nap, the Z’nüni, the walk to nursery. Anyone who has stood in the living room at 5.45am at the end of October with a wide-awake two-year-old knows that the clock change affects children differently than it does us. You do not have to simply sit it out, though. With four days’ run-up and a few deliberate decisions about light and mealtimes, hardly anything is left of it by Monday. This article shows what happens in your child’s body – and gives you a four-day plan with exact times for both directions.
The short answer: start four days before the change and move bedtime, wake time, meals and the nap by 15 minutes each day, in the direction the clock jumps – forwards in spring, backwards in autumn. On the Sunday, live strictly by the new time and steer with light: plenty of morning light in spring, a dark room until the target wake time in autumn. Toddlers need three to seven days, school-age children often only one to three.
- Switzerland: last Sunday in March 2.00am → 3.00am, last Sunday in October 3.00am → 2.00am.
- With young children autumn is usually the harder direction: the child wakes an hour too early.
- Light is the strongest cue for the body clock, mealtimes are the second strongest.
- The gentle route: shift everything by 15 minutes a day for four days, nap and meals included.
- Realistically expect three to seven days for toddlers, one to three for school-age children.
When Switzerland changes the clocks – and which direction is harder
Switzerland follows the same rhythm as the EU. On the last Sunday in March the clock jumps overnight from 2.00am to 3.00am: summer time begins and the night is an hour shorter. On the last Sunday in October it goes back from 3.00am to 2.00am and the night is an hour longer.
Among adults, October counts as the pleasant date. With a toddler in the house it is the other way round. A child who reliably wakes at 6.45am also wakes at their usual internal time on that night – except the clock now reads 5.45am. The gifted hour does not land in bed but in the living room. And the whole day slides with it: the nap and supper come too early, and by 7.30pm the child is wound up.
In spring the problem is the evening. If you put your child to bed at 7.30pm new time, their body is only at 6.30pm. Sleep pressure is not yet high enough, and ten minutes of falling asleep turns into forty.
Why the clock change affects children more than adults
In the brain sits an internal clock that steers the day-night rhythm. In most people its own period runs slightly over 24 hours, so it has to be reset every day – above all by the light that reaches the eyes.
Children have this rhythm more firmly timed than we do, and fewer ways of papering over it. Adults drink coffee or catch up at the weekend; a three-year-old cannot. In young children sleep pressure also builds faster, and the window between “tired and ready” and “overtired and wired” is narrow. A 60-minute shift is enough for a child to miss that window – with drawn-out settling, more crying or early waking as the result.
The research is limited and the measured effects are small: studies find slightly shorter, more broken sleep in the days afterwards, which usually settles within a week. How much leeway your child has also depends on how much sleep they need at their age.
Light and mealtimes: the two strongest cues
Light is by far the strongest cue, and timing is what counts: light in the early morning pulls the body clock forwards – the child gets tired earlier in the evening and wakes earlier in the morning. Light late in the evening pushes it back. That is exactly what you use, depending on which way the clock jumps.
What matters here is the light level outdoors: even on an overcast November morning it is many times brighter outside than in a well-lit kitchen. Twenty minutes at the playground or on the walk to nursery does more than any ceiling light.
The second strongest lever is mealtimes. The metabolism has its own cues, and breakfast at the new time is a clear signal. So do not just move bedtime, but breakfast, the Z’nüni, lunch, the afternoon snack and supper along with it. Third comes movement: activity in the morning helps in spring, activity in the late afternoon in autumn.
Blackout in the lighter half of the year, morning light in winter
After the spring change it is still light at 7.30pm, and it gets worse right through to June. Proper blackout – floor-length, tight at the sides, with no strip of light at the edges – is then the single most effective aid, in the evening and in the morning alike. How to get a room genuinely dark is covered in the article on blacking out a child’s bedroom.
After the autumn change the logic reverses: for the first three to four days keep the room dark in the morning until the target wake time. After that the opposite applies, because from November to February children often get far too little daylight.
Three strategies compared – and which one suits your child
There is no single right way. Which strategy makes sense depends on age, temperament and how much structure your family routine can take at the moment. All three get you there; they differ only in when you do the work: before, never or afterwards.
| Strategy | How it works | Suits | Effort |
|---|---|---|---|
| 1. Do nothing | Live strictly by the new time from Sunday and fine-tune over three to five days. | Flexible sleepers, children without a nap, school-age children from about 6 | Low |
| 2. Shift gently | Start four days ahead and move everything by 15 minutes a day: bed, waking, meals, nap. | Children under 4, very rhythm-dependent children, early risers in autumn | Medium to high |
| 3. Correct afterwards | Prepare nothing, but work deliberately with light, movement and fixed mealtimes from Sunday. | Families with unpredictable weekends, children of about 4 to 6 | Low to medium |
Our recommendation: for children under three and for anyone who is already an early riser in autumn, strategy 2 is worth the effort. From nursery-school age strategy 3 usually suffices, and school-age children almost always get through with strategy 1. And if the preparation creates more stress in your household than it solves, leaving it out is the better decision: a relaxed Sunday does more than a perfectly kept plan.
The four-day plan with exact times
The plans assume a typical toddler rhythm: nap from 12.30pm, bedtime 7.30pm, waking 6.45am. Convert your own times – the 15-minute step stays the same. Which bedtime suits which age is shown in our bedtime chart.
Spring: the clock goes forward
By Saturday you end up with a 6.30pm bedtime. That feels early, but after the clock jumps it comes out as the familiar 7.30pm.
| Day | Nap (start) | Bedtime | Waking |
|---|---|---|---|
| Wednesday (4 days before) | 12.15pm | 7.15pm | 6.30am |
| Thursday | 12.00pm | 7.00pm | 6.15am |
| Friday | 11.45am | 6.45pm | 6.00am |
| Saturday | 11.30am | 6.30pm | 5.45am |
| Sunday (new time) | 12.30pm | 7.30pm | 6.45am |
Autumn: the clock goes back
Here you pull the rhythm later so your child is not sitting awake in bed at 5.45am on the Sunday. Staying up later is easier for many children than going to bed earlier – it just takes enough light and occupation in the evening.
| Day | Nap (start) | Bedtime | Waking |
|---|---|---|---|
| Wednesday (4 days before) | 12.45pm | 7.45pm | 7.00am |
| Thursday | 1.00pm | 8.00pm | 7.15am |
| Friday | 1.15pm | 8.15pm | 7.30am |
| Saturday | 1.30pm | 8.30pm | 7.45am |
| Sunday (new time) | 12.30pm | 7.30pm | 6.45am |
Move mealtimes in the same steps. And reckon with nursery having its own timetable: on nursery days the nap cannot be moved. Concentrate on the evening and the morning instead.
What happens to the nap
The nap is the most sensitive part of the plan, because it determines how much sleep pressure there is in the evening. Basic rule: it moves in 15-minute steps in the same direction as everything else.
In spring it slides earlier and quickly collides with lunch – in that case bring lunch forward by 15 minutes too, rather than cutting the sleep. In autumn it slides later, which is rarely a problem; just make sure it does not run on until 3.30pm, or the evening becomes hard work. If you do have to shorten it, do so by no more than 15 to 20 minutes and wake gently.
For children who are in the middle of dropping the nap, the changeover week is the worst possible time to experiment. A child who still sleeps on three days out of seven needs a quiet window every day that week – even if it amounts to no more than a book in bed. How that transition works is described in our article on dropping the nap.
The day of the change – and how long it realistically takes
Change the clocks on Saturday evening, before you go to bed yourselves, and live strictly by the new display from Sunday morning. That sounds banal, but it is the most effective part: as soon as you start converting in your head, the whole day slips.
In spring that means waking your child at the normal time on Sunday, even if the night was short, having breakfast at the new time and going outside for at least half an hour in the morning. In autumn it means keeping the room dark, not lifting your child out of bed at 5.45am, keeping the morning calm and getting out into the fresh air again in the late afternoon instead.
Realistically, expect three to seven days with toddlers and one to three with school-age children. Plan the Sunday without a birthday party and without a moving date, and expect a little more grumbling on the Monday – at nursery too. If settling becomes an issue in its own right, the article on when your child will not fall asleep will help.
Common mistakes – and when the clock change is not to blame
Letting them sleep in too long on Sunday. That pushes the body clock even further in the wrong direction. No more than 30 minutes beyond the target wake time.
Dropping the nap. The sum “less daytime sleep equals a more tired child” rarely works out. Overtired children settle worse and wake more often at night.
Using screens to keep them awake. A film to help the child hold out works badly on two counts: bright light at the wrong time plus stimulation. Reading aloud or a bath keeps them just as awake.
Making the child “hold out” in the evening. A child showing tired signals at 6.45pm is not more tired at 7.45pm, just more wired.
When the clock change is not the cause
Take note if your child was already waking regularly before six o’clock, or if nothing has improved after two weeks. Other typical causes: a bedtime that does not fit, a nap that no longer matches the age, teething, an infection, starting nursery or a house move. More on this in the article on when your child wakes too early.
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Frequently asked questions about the clock change with children
When do the clocks change in Switzerland?
On the last Sunday in March the clock jumps from 2.00am to 3.00am and the night is an hour shorter. On the last Sunday in October it goes back from 3.00am to 2.00am. Both dates always fall on a Sunday.
Which clock change is harder with young children?
Usually the October one. A toddler wakes at their usual internal time, but the clock now shows an hour less: 6.45am becomes 5.45am. In spring it is mainly falling asleep that becomes difficult.
When should I start shifting the routine?
Four days beforehand, so as a rule on the Wednesday. Move bedtime, wake time, meals and the nap by 15 minutes each day, in the direction the clock jumps. Two days of 30 minutes also work.
How long does it take for my child to adjust?
Allow three to seven days for toddlers and one to three days for school-age children. Children with a very stable rhythm take longer. If nothing has improved after two weeks, the cause usually lies elsewhere.
Should I drop the nap so my child is more tired in the evening?
No, that usually backfires. An overtired toddler falls asleep less easily, not faster. Shift the nap along instead and shorten it by no more than 15 to 20 minutes.
My child has woken at 5am every morning since the change – what helps?
Check the blackout first: a narrow strip of light at the edge of the curtain is enough to wake a child. Then hold the target wake time and only turn on the light at that point. If it persists, push bedtime back in 15-minute steps.
This article provides general information and does not replace paediatric advice. If problems persist, please speak to your paediatrician.
