My baby has day and night mixed up, what do I do?

Sleeping like a log all afternoon, and lying wide awake and cooing at eleven at night. This isn't unwillingness, and it isn't a bad character either. The day and night rhythm still has to develop, and your baby simply doesn't know yet that it's night.

Why this happens

A newborn comes into the world without a working internal clock. It still has to develop, and until then nothing tells the difference between two in the afternoon and two in the morning.

That means something uncomfortable and also something reassuring: for now, you are the clock. The difference between day and night has to come from outside, from you and from the light in your home. And that works, as long as you do it consistently.

In this phase your baby sleeps an enormous amount anyway, between 14 and 17 hours per 24 hours, with big differences between babies. So the problem isn't how much your baby sleeps, but when.

During the day: make it light, busy and fun

• Don't let your baby sleep longer than three hours in a row. Wake them for a feed. This feels wrong, and it's the most important step: if your baby sleeps on during the day, those hours get made up at night.
• Open the curtains. Daylight is the strongest signal there is.
• Go outside, preferably in the morning. Walks, fresh air.
• Talk and play during diaper changes. Make the day a noisy place.

Daytime naps don't have to be pretty. In the carrier, in your arms, in the stroller, in the car: it doesn't matter how, as long as your baby sleeps.

At night: make it boring

• Room dark and quiet.
• Only soft, dimmed light. No screens.
• Whisper, don't talk.
• Diaper changes and feeds with as little stimulation as possible. No eye-contact party in the middle of the night.

The idea is simple: during the day there's something to experience, at night there isn't. Babies learn that difference surprisingly fast.

The order that makes the day calm

Within every wake window, keep the same order: wake up, a full feed, a little play or tummy time, and then sleep again. Feed right after waking and not just before sleep, so drinking doesn't get linked to falling asleep.

A newborn can only be awake very briefly, by the way, about 45 minutes to an hour and a half, and that time includes the feed. See wake windows by age.

Awake as soon as you put them down

That comes with it, and there's a trick for it. If your baby falls asleep in your arms, don't put them down right away. In the first minutes your baby is still in light sleep and notices the move. Wait about twenty minutes, until the sleep is really deep, and only then put your baby in bed.

What you don't need to do now

No strict schedule, no sleep training, no worries about bad habits. This month is about observing and building trust: watching your baby instead of the clock. And you can't spoil a baby, however often you come.

Do keep loose track of when your baby sleeps and when they get tired. Not to turn it into a schedule, but because otherwise you won't see the patterns.