Why Does My Newborn Sleep All Day and Wake All Night?
Newborns don’t arrive knowing that 2am is a terrible time to begin a lengthy conversation.
Some will sleep soundly through a large part of the afternoon, then lie wide awake in the early hours, kicking their legs and looking surprisingly pleased with the arrangement.
Meanwhile, you’re wondering whether you need to keep them awake more during the day, start following wake windows or get a routine in place before this becomes a habit.
You don’t.
Your baby’s body clock is still developing. They need time and some simple cues from the world around them, not a newborn schedule.
Why newborn sleep happens around the clock
The part of the brain that will eventually control your baby’s body clock is already there at birth. But it isn’t yet working in the same organised way as yours.
An adult body uses light, darkness, hormones and other signals to work out when to feel alert and when to feel sleepy. In newborns, these circadian rhythms are still immature.
That’s why sleep is spread across the whole 24 hours at first. Your baby may have one of their longest stretches at 2pm and then spend part of the night feeding, dozing and waking again.
They haven’t mistaken night for day. Their body simply isn’t making a strong distinction between the two yet.
Over the first few months, that begins to change. Their sleep gradually becomes more concentrated at night and their periods of daytime alertness become clearer.
The exact timing varies. Some babies begin to show a more obvious day-night pattern within several weeks. For others, it takes closer to three months.
Neither baby has been taught better sleep.
You may recognise the pattern from pregnancy
You might remember your baby becoming particularly lively just as you settled into bed.
During the day, your movement may have helped lull them. Once you stopped, you were also more likely to notice every kick, roll and wriggle.
So the nighttime activity can feel rather familiar after birth.
But newborn day-night confusion isn’t simply a habit carried over from the womb. The main explanation is that your baby’s own circadian system is still maturing and learning from the light, darkness and activity around them.
What helps a newborn learn day from night?
You don’t need to force a routine or keep your baby awake.
The aim is simply to make daytime and nighttime feel different.
Let daylight into their day
Open the curtains in the morning and spend some time outside when you can.
Outdoor daylight is much stronger than ordinary indoor lighting and helps provide a useful timing signal to the developing body clock.
This doesn’t require a special morning routine. A walk with the pram or carrier counts. So does standing in the garden for a while with a cup of tea you may or may not get to finish.
Carry on with ordinary daytime life
You don’t need to keep the house silent every time your newborn sleeps.
Talk normally, move around and let everyday household sounds continue. Daytime can feel bright and active even though your baby will still spend much of it asleep.
That doesn’t mean deliberately waking them or surrounding them with constant noise. It means you don’t have to make every daytime nap look and sound like the middle of the night.
Keep nighttime dim and uninteresting
At night, keep the lights low and your voice quiet. Feed them, change them when needed and offer all the closeness and help they require.
You are not trying to avoid interacting with your baby. You’re allowing nighttime care to happen without adding lots of light, noise and conversation.
They may still decide that 3am is an excellent time to inspect your face. Keep the atmosphere calm anyway.
Don’t keep them awake to make them sleep later
Keeping a newborn awake for longer during the day will not make their body clock mature faster.
It is more likely to leave them upset and dysregulated without producing the lovely long night you were promised.
Let them sleep when they need to sleep. The distinction between day and night develops gradually through repeated environmental cues and neurological maturity, not through accumulating enough tiredness.
Don’t worry about precise wake windows
Newborn sleep is irregular. A baby may stay awake for a short feed and drift straight back to sleep, then have a much longer alert spell later.
A wake window app cannot tell you exactly when your newborn needs to sleep. Watch your baby rather than trying to keep them awake until a timer says the window is complete.
Their pattern will become easier to read as they grow.
Do newborn naps need to happen in daylight?
You don’t automatically need blackout blinds for daytime naps.
Some newborns sleep perfectly well in an ordinary room with daylight coming in. This can help daytime feel different from night without you needing to do anything complicated.
But you haven’t damaged your baby’s body clock if you’ve already used blackout blinds. And if you have a particularly alert or light-sensitive baby who sleeps better in a darker room, you can still use them.
Their overall exposure to daylight and darkness across the day matters more than whether every individual nap happens with the curtains open.
Does breastmilk help babies learn day from night?
Breastmilk changes across 24 hours. It contains very little melatonin during the day and more at night, so researchers think it may provide breastfed babies with an additional timing cue.
We don’t yet know how much difference this makes to an individual baby’s sleep, so it isn’t a treatment for day-night confusion.
If you express milk, there is no need to create an elaborate labelling system unless you want to. And if your baby has formula or a mixture of breastmilk and formula, they are not missing something required for healthy circadian development.
Your baby’s own body clock will still mature.
How long does newborn day-night confusion last?
Most babies begin to develop a clearer day-night pattern during the first two to three months.
It doesn’t usually happen neatly. You may get several nights that seem more settled, followed by one in which your baby appears to have returned to a different time zone.
Look for a gradual shift rather than a particular date:
longer stretches of sleep beginning to happen at night
more alert time during the day
nighttime waking feeling calmer or shorter
a slightly more recognisable pattern appearing
There is variation between babies, and temperament can affect how clearly that pattern shows itself. A highly alert baby may still wake more fully and remain interested in everything around them, even once their circadian rhythm is developing.
You haven’t created this pattern
Your newborn’s developing body clock is not a sleep problem you caused.
Responding to them at night will not make it worse. Feeding them to sleep will not confuse them. Contact naps won’t prevent them from learning the difference between day and night.
You can help by bringing daylight and ordinary activity into the day, then keeping the nights dim and calm.
The rest needs time.
If daytime sleep is also feeling completely unpredictable,How Many Naps Should My Baby Have in a Day? explains what is realistic at this age.
And if you’ve been told to follow the clock more closely,Why Wake Windows Might Be Stressing You Out looks at why fixed timings don’t suit every baby.
If your newborn will only sleep while being held,My Baby Will Only Sleep on Me - Is That a Problem? will help you understand why.
Want help making sense of your newborn’s sleep?
If you’d like me to look at what is happening with your own baby, you can book a Sleep Clarity Call here.
We’ll spend sixty minutes looking at the whole picture and work out what may help without sleep training or trying to force your newborn into a schedule.
If you’re not ready to book a call, you can have a look through my free baby sleep resources first.
Frequently Asked Questions
What is newborn day-night confusion?
Newborn day-night confusion is the name commonly given to a pattern in which a baby sleeps for longer stretches during the day but is much more awake at night.
Your baby isn’t literally confused. Their developing body clock does not yet create the strong distinction between day and night that yours does.
Why does my newborn sleep all day and stay awake at night?
Newborn sleep is distributed across the whole 24 hours because circadian rhythms are still maturing.
Your baby doesn’t yet receive the same strong biological signal to be awake during the day and asleep for longer stretches at night. That pattern usually becomes clearer over the first few months.
How long does newborn day-night confusion last?
Many babies begin to show a clearer difference between day and night during the first two to three months. Some show it sooner and others take longer.
The change is usually gradual rather than something that happens on one particular night.
Should I keep my newborn awake during the day?
No. Keeping a tired newborn awake is unlikely to improve their nighttime sleep and may leave them upset and dysregulated.
Let your baby sleep when they need to. Daylight and ordinary daytime activity can provide useful timing cues without you restricting their sleep.
Should I wake my newborn from long daytime naps?
Newborns usually need to wake regularly enough to feed, particularly while feeding is being established or if there are concerns about weight gain.
Follow the advice you have been given by your midwife, health visitor, GP or feeding professional. Don’t restrict daytime sleep solely to try to make your baby sleep through the night.
Should newborn daytime naps be in a bright room?
They don’t need to be in a brightly lit room, but you also don’t have to make the room completely dark.
Ordinary daylight during the day can help provide a contrast with nighttime. If your baby is easily disturbed and sleeps better in a darker room, using one will not stop their body clock from developing.
Do I need blackout blinds for newborn naps?
No. Blackout blinds are not necessary for every newborn nap.
They may be useful for a baby who is particularly sensitive to light or during very bright summer evenings, but your newborn does not need every sleep to happen in complete darkness.
Will responding to my baby at night make day-night confusion worse?
No. Your newborn needs feeding, comfort and help regardless of the time.
Responding to them does not prevent their body clock from developing. Keeping nighttime care dim and quiet provides a contrast with daytime without asking you to withhold support.
Does feeding a newborn to sleep confuse their body clock?
No. Feeding to sleep is biologically normal and does not cause day-night confusion.
Your baby’s circadian rhythm develops through neurological maturity and repeated environmental cues. It does not depend on them learning to fall asleep without help.
Does breastfeeding help with day-night confusion?
Breastmilk contains more melatonin at night than during the day, and researchers think this may act as one of several timing cues.
It isn’t known how much effect this has on an individual baby’s sleep. Formula-fed and combination-fed babies still develop healthy day-night rhythms.
When should I be concerned about my newborn sleeping all day?
Newborns sleep a great deal, but speak to your midwife, health visitor, GP or another appropriate healthcare professional if your baby is unusually difficult to wake, is feeding poorly, has fewer wet nappies than expected, seems floppy or has changed noticeably from their usual self.
Seek urgent medical advice if your baby has breathing difficulties, a change in colour, a high or unusually low temperature, or you feel something is wrong.
