Newborn day-night confusion: why it happens and how to fix it

Day-night confusion is when a newborn sleeps for long stretches during the day and is wide awake, feeding and fussing, at night. It's common, it isn't something you've caused, and it passes. Babies are born without a working body clock, so for the first weeks they sleep and wake around the clock in short bursts. You can't switch the clock on, but you can give clear signals about which part of the day is which, and most babies start to follow them over the first 2 to 4 months.

What is day-night confusion?

The AAP's guide to day-night reversal says newborns sometimes mix up their days and nights, and calls it temporary: it improves as babies replace lots of short catnaps with longer stretches of sleep. In practice it often looks like:

• long, deep naps through the morning and afternoon
• alert, wide-eyed spells or long feeds in the small hours
• a baby who seems "ready to party" just as you want to sleep

None of this means your baby is a poor sleeper. The NHS says newborns invariably wake repeatedly in the night for the first few months, because they need to be fed.

Why do newborns mix up day and night?

Newborns don't have an adult-style body clock yet. Sleep Foundation's newborn sleep guide says babies are born without a strong circadian rhythm (the body's 24-hour clock), and that this develops over time with help from light and dark. It says infants generally don't follow a schedule tied to the time of day for about the first 2 months.

Feeding is the other driver. KidsHealth says breastfed babies feed about every 2 to 3 hours and bottle-fed babies about every 3 to 4 hours, so a newborn's sleep is broken up by hunger whatever the time. The Australian Breastfeeding Association (Australian Breastfeeding Association) says that in the early days, babies have no idea about day and night, and that frequent waking is normal and helps them stay nourished, safe and connected to you.

How long does day-night confusion last?

It varies, and sources describe the change at slightly different points:

So for most babies, the worst of the mix-up is in the first weeks, and nights become more predictable over the second and third months. See newborn sleep patterns for what's typical across the first 12 weeks, and newborn sleep week by week for a stage-by-stage view.

If your baby was born early, compare them with their corrected age. The AAP's corrected-age guide explains it as your baby's age minus the weeks they were born early, and gives the example of a baby born 8 weeks early who, at 4 months old, has a corrected age of 2 months.

How can I help my baby tell day from night?

You're giving your baby's developing clock two clear, different signals. The NHS, the AAP and Sleep Foundation all suggest the same contrast.

By day

1. Let the light in. The NHS suggests opening the curtains during the day. Sleep Foundation says light and sound during the day help.
2. Keep normal noise. The NHS says not to worry too much about everyday noises while your baby naps, and the AAP says it's fine if your baby falls asleep in the busier parts of the house or while you're out on an errand.
3. Talk and play while they're awake. The NHS suggests playing games during daytime awake time. With a newborn, that might be face-to-face chat, a walk outside or a little tummy time.
4. Feed regularly through the day. KidsHealth says to wake your baby to feed every 3 to 4 hours until they're showing good weight gain. Follow your midwife's or pediatrician's advice for your baby.

At night

1. Keep lights low. The NHS suggests keeping the lights down low, and the AAP suggests a dark room and a soft voice.
2. Keep it quiet and boring. The NHS says not to talk much or play. The AAP suggests limiting night-time contact to feeding, burping, changing and gentle soothing when needed.
3. Change diapers only when needed. The NHS suggests not changing your baby unless they need it. Have everything ready so changes are quick.
4. Settle straight back down. The NHS suggests putting your baby down as soon as they've been fed and changed. The Australian Breastfeeding Association says short night feeds can settle your baby, and you, back to sleep quickly.

Many families find a small lamp or night light is enough to feed and change safely without fully waking everyone.

What doesn't help with day-night confusion?

• Keeping your newborn awake for long stretches. KidsHealth says not to keep your baby up during the day in the hope they'll sleep better at night. Sleep Foundation's wake-window guide says newborn wake windows of 30 to 90 minutes are normal and there's no need to stretch them, and that parents have little ability to speed up sleeping through the night. The AAP's settling guide does suggest keeping babies awake longer during the day; with a newborn, that's best read as making the most of natural awake time with light and play, not holding a tired baby up.
• Skipping or spacing out night feeds. Night feeds are how a newborn gets enough milk. See the next section.
• Changing how or where your baby sleeps. A longer stretch is never worth side or tummy sleeping, a sofa, or an inclined or weighted product. See sleep products to avoid.
• Adding anything to bottles. Nothing but breast milk or formula goes in a newborn's bottle, whatever you've heard about longer sleep.
• Expecting a schedule. Sleep Foundation says erratic sleep schedules are normal in newborns. See wake windows for why awake-time ranges are a convention, not a rule.

Should night feeds stay responsive?

Yes. Helping your baby learn that night is for sleeping is about the setting, not about feeding less. The WHO describes responsive breastfeeding as feeding as often as the child wants, day and night. The CDC says most breastfed babies feed about 8 to 12 times in 24 hours, sometimes as often as every hour during cluster feeding, and some have one longer sleep of 4 to 5 hours.

Feed when you see hunger cues at any hour. Formula-fed babies feed on cue at night too. See hunger cues and the feeding schedule by age.

How do I keep night feeds safe when we're both exhausted?

Night feeds in the early weeks are when you're most likely to doze off with your baby. A few things keep that risk down:

• Back to sleep, own crib, your room. Australia's Red Nose's six safe sleep recommendations in Australia include placing your baby on their back and sleeping them in their own safe sleep space in your room for at least the first 6 months. The NHS says this applies day and night.
• Never on a sofa or armchair. Australia's Red Nose's sofa advice says never to sleep with your baby on a sofa, armchair or recliner, no matter how tired you are. If you feel drowsy, put your baby in their own sleep space before you fall asleep.
• Feed somewhere you won't drift off on cushions, with the crib or bassinet within reach so you can put your baby straight down.
• Share the nights. The NHS suggests trying to sleep when your baby sleeps and asking a partner to help, for example by sharing formula feeds or taking the early-morning change so a breastfeeding parent can go back to sleep.

See safe sleep for the full checklist and sleep deprivation for coping with broken nights.

Example 24 hours with a 3-week-old (fictional; adjust to your baby)

When should I get help?

Call 911 now if your baby:

• is floppy, much sleepier than usual, hard to wake or can't be woken
• is much sleepier than usual and not feeding
• is struggling to breathe, grunting or sucking in under the ribs
• has blue, gray, very pale or blotchy skin, lips or tongue
• is under 3 months and has a temperature of 38°C (100.4°F) or higher
• has had no wet diaper or pee for 12 hours

These come from the NHS urgent-help guide. The NHS jaundice page also says to call for emergency help if a yellow (jaundiced) baby is sleepier than normal, difficult to wake or not feeding.

Get medical help today if your baby is refusing feeds or feeding much less than usual but is alert, has fewer wet diapers than usual, or has jaundice that isn't getting better. See newborn jaundice.

Talk to your doctor or pediatrician if day-night confusion hasn't eased by around 3 to 4 months, if you're worried about how much your baby sleeps or feeds, or if broken nights are wearing you down (your pediatrician's office can help too). If you have thoughts of harming yourself or your baby, put your baby safely in their crib and call 988 (call or text) or 911 now.

What's worth noting while you sort out days and nights?

For a few days, jot down when your baby wakes, feeds and sleeps, and mark which stretches are day and which are night. You're looking for the longest sleep slowly drifting into the evening and night. It also gives your midwife or pediatrician a clear picture if you need advice.