Baby Sleep Habits Around the World

A baby in Stockholm is tucked into her own crib at 7 PM in a dark, quiet nursery. A baby in Madrid is still awake at 10 PM, dozing on the couch while cousins argue about dinner. A baby in Tokyo has just fallen asleep pressed against her mother's side on a futon the whole family shares. A baby in Oaxaca is riding in a rebozo while grandma cooks, and she'll sleep right there until she's carried to bed. All four babies are healthy. All four will probably grow up to be decent sleepers. None of their parents think the other three are doing it right.

Infant sleep is one of the most culturally variable things humans do. And yet across every study that's looked at it, the total amount of sleep a baby gets varies surprisingly little. Culture shapes the schedule, the location, and who the baby sleeps next to. Biology sets the total.

Does total sleep vary much between cultures?

Not as much as bedtime does. The largest cross-cultural study of infant sleep to date surveyed parents of 29,287 babies and toddlers across 17 countries. It found that predominantly-Asian countries averaged later bedtimes (around 22:00) and predominantly-Caucasian countries averaged earlier bedtimes (around 20:00), a two-hour difference.¹ Total sleep differed too, but by a much smaller margin, roughly 60 to 80 minutes, and most of that gap closed as babies grew into the toddler years.

The practical takeaway: your baby's biological sleep need is mostly fixed by age. How you distribute that sleep across the day, and when the night portion starts, is where culture does most of its work. For a concrete age-by-age breakdown of how much sleep a baby actually needs, see our sleep needs guide.

Why do Spanish and Latin American babies go to bed so late?

Because the whole family does. In Spain, Italy, and most of Latin America, dinner often starts at 21:00 or later, and family life organizes around a late evening. Babies participate in that rhythm, napping longer in the afternoon and staying up until the house winds down.

This isn't negligence or disorganization. It's a different answer to the question "when should the day end?" An Italian pediatrician is not going to tell a family to put a 9-month-old down at 19:00 if the rest of the household is just sitting down to pasta. A Spanish abuela has seen three generations of babies do fine on a 22:00 bedtime. The siesta culture that shifts adult schedules also shifts infant ones. Our bedtime guide walks through how to find a bedtime that fits your family's actual schedule rather than an imported ideal.

What the research does show: later bedtimes tend to correlate with slightly shorter total sleep, especially if the afternoon nap doesn't fully compensate.¹ Worth knowing, not worth panicking about.

Why is co-sleeping so common outside the West?

Because it was the default for most of human history, and it still is in most of the world. Depending on how you count, somewhere between 60% and 80% of the world's babies sleep in physical contact with a parent for at least the first year. In the Mindell cross-cultural survey, only 4% of babies in predominantly-Asian regions fell asleep independently in their own crib, compared to 57% of babies in predominantly-Caucasian regions.¹

Japanese families have a word for it: kawa no ji, "the character for river," because mother, baby, and father laid out together look like the three strokes of the kanji 川. In much of Latin America, a baby sleeping alone in a separate room would strike most grandmothers as odd at best and unsafe at worst. Many African and South Asian families room-share and bed-share as a matter of course, often well into the preschool years.

This is where the conversation gets careful. The American Academy of Pediatrics specifically recommends room-sharing for the first 6 to 12 months, but advises against bed-sharing due to SIDS risk.² That guidance is drawn mostly from data in high-income Western contexts, with soft mattresses, heavy bedding, and relatively high rates of parental alcohol and smoking. Anthropologists who've studied bed-sharing in other contexts have argued the risk profile looks different when the sleep surface is firm, bedding is minimal, and neither parent smokes or drinks.³

The honest summary: bed-sharing is what most of the world does, it's been done safely for millennia, and it also carries real risks in some modern sleep environments. Talk to your pediatrician about your specific setup instead of treating the question as a cultural referendum.

What did researchers learn by watching babies in rural Kenya?

That biology and culture braid together in ways that don't map neatly onto Western frameworks. Charles Super and Sara Harkness, two anthropologists, spent years in the 1970s and 1980s studying child development in a Kipsigis farming community in Kokwet, Kenya.⁴ Babies there were carried on their mother's back during the day and slept in the same bed at night, feeding on demand with no scheduled mealtimes.

By 16 weeks, those infants were sleeping about two hours less per 24 hours than a comparison American sample.⁴ They also didn't consolidate into long night stretches the way Western sleep-training guides describe. Instead they took many short bouts of sleep distributed across day and night, matching the rhythm of nursing on demand.

Super and Harkness called their framework the "developmental niche," the idea that every baby grows inside a specific combination of physical settings, caregiver practices, and culturally shared beliefs about what babies need.⁵ Change the niche, and sleep changes with it. None of the Kokwet babies were sleep-deprived in a clinical sense. They were just on a different pattern, one their community considered normal.

Is sleep training a Western concept?

Largely, yes. The idea that a baby should fall asleep alone, in a separate space, without adult contact, at a fixed hour, is a relatively recent and geographically narrow invention. It took hold in the US and UK in the early 20th century, got codified in books by Ferber, Weissbluth, and Ezzo in the late 20th century, and exported outward from there.

Most of the world's grandmothers have never heard of cry-it-out, graduated extinction, or the Ferber method. They've heard of rocking, nursing, walking, singing, and carrying, because those are what humans have always done to help babies sleep. When your abuela or your nonna looks horrified that you're letting the baby cry in another room, she's responding to a genuinely new idea, not a universal one.

That doesn't mean sleep training is wrong. Research from Australia and the UK shows that gentle behavioral interventions, applied from around 6 months of age, can reduce parental exhaustion and maternal depression without measurable long-term harm to the child.⁶ It just means sleep training is one cultural answer to a hard problem, not the answer. Families who don't use it aren't doing their babies a disservice. Families who do use it aren't cold or un-maternal.

How should I think about all of this when my own mother disagrees with me?

Generously, on both sides. If you're raising a baby in Seattle but your mother raised you in Mexico City, you're going to get advice that reflects a different developmental niche than the one you're currently in. The 22:00 bedtime that worked for you as a toddler in 1995 Mexico may or may not work for your baby in 2026 Seattle, because the niche around that bedtime has changed: different daycare pickup times, different commute, different grandparent availability, different noise levels, different light exposure.

Some of the old-country advice is timeless (hold the baby, respond quickly, trust her cues) and some of it was contextual (everyone eats at 22:00, so the baby does too). Parsing which is which is the actual work.

A few things are genuinely universal across the research:

• Babies need consistent cues that bedtime is coming. A predictable bedtime routine improves sleep outcomes regardless of culture.⁷
• Responsive caregiving, however it's organized, is associated with better sleep in infancy and later childhood.
• Total sleep need is biological. You can't train a 6-month-old to need less sleep than a 6-month-old needs.

Everything else (when bedtime falls, who the baby sleeps next to, whether naps happen in a crib or a stroller or on an aunt's lap) is where cultures differ and where families get to decide.

A rough map of bedtime by region

Specific numbers vary by study and by family, but the Mindell cross-cultural data and subsequent work line up roughly like this:

Region	Typical bedtime (6-24mo)	Common sleep arrangement
Northern Europe, Scandinavia	19:00 to 19:30	Own crib, own room
US, UK, Canada, Australia	19:00 to 20:00	Own crib, often own room
Southern Europe (Italy, Spain)	21:00 to 22:00	Own crib, often parents' room
Latin America	21:00 to 22:00	Often room-sharing, sometimes bed-sharing
Japan, Korea	21:30 to 22:30	Frequently bed-sharing (futon)
Much of South and Southeast Asia	21:00 to 22:30	Bed-sharing common
Sub-Saharan Africa (varies widely)	Later, more flexible	Bed-sharing predominant

The two-hour gap between a Swedish bedtime and a Spanish bedtime is the single most striking finding in the cross-cultural data, and it's stable across decades of research.¹

How nappi thinks about cultural context

We built nappi for bilingual Latin American families, which means the default assumptions baked into most English-language sleep apps don't always fit. A 22:00 bedtime isn't a red flag in our app. Room-sharing and bed-sharing are normal inputs, not things to hide. Translations across Spanish, Portuguese, Italian, French, German, and English try to use the terminology each culture actually uses (pisolino, not riposino; siesta, not "nap time"; see our resources for the fuller picture).

The science of sleep is real, and the numbers for total sleep need are pretty stable. But the schedule you build around those numbers is yours to design, informed by your own family, your own culture, and your own pediatrician.

Frequently asked questions

Is it true that babies in France sleep through the night earlier?

That claim comes mostly from one popular book, not from solid comparative data. French babies do show earlier sleep consolidation in some surveys, often attributed to the cultural practice of "la pause" (waiting a few minutes before responding to overnight stirring). But the cross-cultural research doesn't single out France as a consistent outlier. Most Northern European countries look fairly similar to each other.

Is co-sleeping safe?

It depends on how it's done. The AAP recommends against bed-sharing in the first year, especially on soft surfaces, with bedding, or if a parent smokes, drinks, or takes sedating medications.² In settings where those risk factors are absent and the sleep surface is firm and flat, the evidence base is more mixed. Talk to your pediatrician about your specific situation rather than relying on cultural defaults in either direction.

My baby's bedtime is later than American guides say. Is that a problem?

Only if total sleep is consistently short for her age, or if she's showing signs of being chronically overtired. A 21:30 bedtime with a long afternoon nap can produce the same total sleep as a 19:00 bedtime with a shorter nap. Check our sleep needs guide for age-by-age totals and see where your baby actually lands.

Should I try to shift my baby to an earlier bedtime to match the research?

Only if your family's schedule allows for it and your baby seems undertired at her current bedtime. Forcing an earlier bedtime that doesn't match household rhythms often backfires. The goal is adequate total sleep, not a specific clock time.