Why is my newborn not sleeping at night? Day-night confusion, and what our three-week log showed

At ten past two in the morning, three weeks after our daughter was born, she was lying along my forearm with her eyes wide open, studying the ceiling fan as if it were the most interesting thing in Dubai. She had slept most of the afternoon. Why is a newborn not sleeping at night? Mostly because a newborn does not yet know that night exists, and has a stomach that needs refilling every two or three hours. The Sleep Foundation puts the first part plainly: "For around the first 2 months of life, infants do not follow a sleep schedule linked to the time of day." What a parent can shape in those weeks is not the length of the night. It is the difference between night and day, and that difference is what the body clock slowly learns from.

Why is my newborn awake at night and asleep all day?

Two separate things are going on, and it helped to stop treating them as one.

The first is hunger. The NHS page on baby sleep says "Babies will wake during the night because they need to be fed." The Sleep Foundation adds that "Breastfed babies may need to feed around every two hours, while formula-fed babies may go closer to three hours between feedings." In the first weeks a long unbroken night is not the target. Waking to feed is the job.

The second is the clock. The same Sleep Foundation page names two hormones, melatonin and cortisol, that affect when newborns sleep and wake, and says "As infants reach 8 to 9 weeks old, the release of these hormones begins to follow a circadian rhythm." Before that, sleep arrives in pieces scattered across the 24 hours, "each nap lasting between one and four hours." Nothing tells the longest piece to land at night rather than at three in the afternoon. In our flat it landed at three in the afternoon.

So in the first couple of months, a newborn awake at night is usually hungry, not yet clocked, or both.

What can parents actually change in the first weeks?

Not the hunger. The contrast, yes. The NHS says "It's a good idea to teach your baby that night-time is different from daytime from the start." By day it suggests to "open curtains, play games and do not worry too much about everyday noises" while the baby sleeps. At night it lists five habits: keep the lights down low, do not talk much and keep voices quiet, put the baby down as soon as they have been fed and changed, do not change them unless they need it, and do not play.

What we did with that list:

• Daytime feeds in the living room with the curtains open, normal voices, the washing machine running if it happened to be running.
• Night feeds by one small lamp on the floor, turned to face the wall. No phone screen held over her face.
• A nappy change at night only when it was actually wet or dirty, on the mat beside the cot, not in the bright bathroom.
• No chatting at night beyond a low hum. This was the hardest one, because at 2am a wide-eyed baby feels like company.
• The first feed after seven in the morning got the full daytime treatment: curtains, light, voices.

She slept in our room, in her own cot, the whole time. The NHS is clear on that point: "For at least the first 6 months your baby should be in the same room as you when they're asleep, both day and night."

A worked example: week three against week seven

I kept a paper log on the fridge, because memory at that stage is useless. Below is one ordinary 24 hours from week three and one from week seven, rounded to the nearest ten minutes. It is one baby, not a benchmark.

The first surprise is the bottom row: she was not sleeping more at week seven, if anything slightly less. The nights got easier for a different reason: the longest stretch moved out of the afternoon and into the start of the night, and the long awake spell after midnight shrank to the length of a feed.

Total sleep barely changed between week three and week seven. What changed was where the longest stretch landed.

I cannot prove our dim, quiet night feeds caused that shift. The timing sits just before the eight-to-nine-week window the Sleep Foundation describes, so some of it was simply her growing. What the log does show is that the two worst nights in those weeks were the two when visitors stayed late and the big ceiling light stayed on through a feed. After the second one we stopped arguing about the lamp.

When does a bedtime routine start to matter?

The NHS says a simple, soothing bedtime routine "may help them settle", and its list of ideas includes a bath, night clothes and a fresh nappy, dimming the lights, a cuddle, a lullaby and "reading a bedtime story". With a newborn the story has nothing to do with the pictures. It is a familiar voice at an even pace in a dim room, which is the same message as the night feed, delivered a little earlier in the evening.

We started reading the same short book most nights at around six weeks, mostly because it gave the evening an obvious last step. Three years on the book is Whale Song Lullaby, paced to a slow breath in and out, and the evening has grown into the lamp round our three-year-old does now. The shape of the last ten minutes has barely changed.

None of this is medical advice. The NHS points parents to their health visitor when a baby is having problems sleeping, and a newborn who is hard to wake for feeds or seems unwell is a conversation for a doctor, not a blog.

The NHS also notes that between three and six months "Some babies may sleep for 5 to 8 hours or longer at night, but not all." Until then, a 2am waking that ends in a feed is the system working. The part a parent controls is quieter and slower: bright, noisy, sociable days and dim, dull, wordless nights. Our daughter could not read a clock at three weeks, but she could tell the living room at noon from one lamp on the floor at two.

Sources

• Helping your baby to sleep · NHS
• Newborn Sleep Schedule: What Parents Should Expect · Sleep Foundation (Danielle Pacheco, medically reviewed by Nilong Vyas, MD, MPH)