Baby Sleep Schedule by Age — 0 to 12 Months
This is that map. A complete, honest, age-by-age guide to baby sleep in the first twelve months — what is normal at every stage, what to expect, and how to gently support better sleep for your baby and yourself.
Baby sleep is one of the most searched, most discussed, and most misunderstood topics in all of parenting. Every family, every baby, every culture approaches it differently — and there is no single right answer. But there is a great deal of evidence about what babies are neurologically and developmentally capable of at each age, and understanding this evidence helps parents set realistic expectations, reduce unnecessary anxiety, and make informed choices about how to support their baby's sleep.
This guide covers the full first year — newborn through to twelve months — with realistic sleep amounts, sample schedules, wake windows, sleep regressions, and practical strategies that work with your baby's biology rather than against it.
Understanding why baby sleep is the way it is makes it far less frustrating. Babies have significantly shorter sleep cycles than adults — approximately 45 to 50 minutes compared to the adult cycle of 90 minutes. At the end of each cycle, all sleepers briefly rouse. Adults have learned to put themselves back to sleep without fully waking. Babies have not yet developed this skill — which is why many babies wake fully between sleep cycles and need help returning to sleep.
Additionally, babies spend a much higher proportion of their sleep in active (REM) sleep than adults — approximately 50% compared to the adult 20%. REM sleep is lighter and more easily disturbed, which is why babies appear to sleep so restlessly and why they are easily woken by sounds and movement.
Finally, the circadian rhythm — the internal body clock that separates day from night — is not developed at birth. It typically begins to establish between 6 and 12 weeks of age. Before then, babies genuinely do not know the difference between day and night.
In the first four weeks, there is no schedule — and attempting to impose one will only cause frustration. Newborns sleep in short stretches of 2 to 4 hours around the clock, waking to feed. They have no concept of day versus night, and their tiny stomachs require feeding every 1.5 to 3 hours.
Around 6 to 8 weeks, the circadian rhythm begins to develop. You may notice the baby staying awake for slightly longer stretches during the day and sleeping one slightly longer stretch at night — sometimes 3 to 4 hours. This is the first sign of biological day-night differentiation. Celebrate it.
The 4-month sleep regression is one of the most significant — and most disruptive — events in infant sleep development. Around 3 to 4 months, the baby's sleep architecture permanently changes to become more like adult sleep, with distinct light and deep sleep cycles. This is a developmental achievement — but it means babies who were beginning to consolidate sleep often start waking frequently again. Many parents describe this as the hardest period of the first year.
Before 4 months, babies fall into deep sleep almost immediately. After the regression, they cycle through light sleep phases — and wake between cycles if they do not know how to connect sleep cycles independently. A baby who was fed, rocked, or nursed to sleep now wakes at the end of every 45-minute cycle needing the same help to return to sleep.
This is not a feeding problem. It is a sleep association issue. The baby is waking because the conditions present when they fell asleep — nursing, rocking, a parent's presence — are no longer there when they wake between cycles. They need those conditions to return to sleep.
What helps: Introducing a consistent bedtime routine. Gradually helping the baby practice falling asleep in their sleep space rather than always in arms. A consistent response to night waking. Patience — this phase passes, typically within 4 to 6 weeks.
By 5 to 6 months, many babies are beginning to consolidate their naps and can handle longer awake windows. The move toward a 2-nap schedule often begins here — though some babies still need 3 naps until closer to 7 or 8 months. Night sleep is beginning to lengthen for many babies, and some may sleep 5 to 6 hour stretches. Solid foods beginning at 6 months do not directly improve sleep — but settling into a more predictable feeding and nap pattern does.
Most babies settle firmly into a 2-nap schedule by 7 to 8 months. The first nap is typically mid-morning and the second is early afternoon. Night sleep is beginning to consolidate for many babies — some sleep 6 to 8 hour stretches, though many still wake once or twice for a feed. Separation anxiety, which peaks around 8 to 9 months, can suddenly worsen night waking even in babies who were sleeping well.
Around 8 to 9 months, many babies experience another significant sleep disruption — caused by the explosion of developmental progress happening simultaneously. New motor skills (crawling, pulling to stand), the emergence of separation anxiety, and cognitive leaps all contribute to disrupted sleep. Babies who were sleeping through may start waking multiple times again. This is developmental and temporary — typically lasting 2 to 6 weeks.
By 10 to 12 months, most babies are on a solid 2-nap schedule with significantly more predictable days. Many babies are sleeping 10 to 12 hours at night — though still waking once or twice, particularly if breastfeeding. Some babies begin showing readiness to transition to one nap closer to their first birthday, though the majority make this transition between 12 and 18 months.
Sleep Regressions — What They Are and When to Expect Them
Sleep regressions are temporary periods of disrupted sleep that coincide with significant developmental leaps. They are not regressions in ability — the baby is not going backwards. They are signs of forward developmental progress, even when they feel like anything but.
| Age | Regression | Why It Happens | Duration |
|---|---|---|---|
| 4 months | 4-month regression | Sleep architecture permanently matures — most significant regression | 4 to 6 weeks |
| 6 months | 6-month regression | Rolling, sitting, teething beginning, growth spurt | 2 to 4 weeks |
| 8 to 10 months | 8/9/10-month regression | Crawling, pulling to stand, separation anxiety peak, cognitive leaps | 3 to 6 weeks |
| 12 months | 12-month regression | First steps, language development, nap transition beginning | 2 to 4 weeks |
Quick Reference — Baby Sleep by Age
| Age | Total Sleep | Night Sleep | Naps | Wake Window |
|---|---|---|---|---|
| 0 to 4 weeks | 16 to 18 hrs | 8 to 9 hrs (fragmented) | 4 to 6 naps | 45 to 60 mins |
| 1 to 2 months | 15 to 17 hrs | 8 to 10 hrs (fragmented) | 4 to 5 naps | 60 to 75 mins |
| 3 to 4 months | 14 to 16 hrs | 10 to 11 hrs | 3 to 4 naps | 75 to 120 mins |
| 5 to 6 months | 14 to 15 hrs | 10 to 12 hrs | 2 to 3 naps | 2 to 2.5 hrs |
| 7 to 9 months | 13 to 15 hrs | 10 to 12 hrs | 2 naps | 2.5 to 3.5 hrs |
| 10 to 12 months | 13 to 14 hrs | 10 to 12 hrs | 2 naps | 3 to 4 hrs |
10 Evidence-Based Tips to Help Your Baby Sleep Better
A predictable sequence — bath, feed, song, sleep — performed in the same order every night conditions the brain to begin producing melatonin at the start of the routine. Within a few weeks, the routine itself triggers sleepiness. Even a simple 3-step routine works — it is the consistency, not the complexity, that matters.
Putting a baby to sleep too late in their wake window results in an overtired, cortisol-flooded baby who is harder to settle and sleeps worse. Watch for early tiredness cues — yawning, eye rubbing, zoning out — and begin the settling process before these appear. The wake windows in this guide are your most useful scheduling tool.
White noise masks household sounds that would otherwise wake a baby between sleep cycles. It also mimics the constant whooshing sound of blood flow that the baby heard in the womb — which is why it is so soothing. Use it at a safe volume (no louder than a shower — approximately 50 to 65 decibels) throughout the entire sleep period, not just to settle.
Darkness triggers melatonin production. Even brief exposure to light during night waking's suppresses melatonin and makes it harder for the baby to return to sleep. Blackout curtains for naps and night sleep, and dim red-toned light (not blue or white light) for any necessary night interactions, make a measurable difference to sleep quality.
During day naps — normal household noise, normal daylight. During night — darkness, quiet, minimal interaction. This environmental contrast reinforces the developing circadian rhythm and helps the baby's brain map the difference between day and night more quickly.
A dream feed — feeding the baby at around 10 to 11 PM while they are still mostly asleep — tops up the stomach before the parent goes to bed, often extending the subsequent sleep stretch. Many parents find this shifts the longest night stretch to overlap with their own sleep window, adding 1 to 2 hours of uninterrupted parental sleep.
Counterintuitively, a later bedtime does not result in a later wake time or more overnight sleep. An overtired baby on a late bedtime often sleeps worse and wakes earlier. Most babies sleep best with a bedtime between 7 and 8 PM, which aligns with the natural rise in melatonin in the early evening.
From around 6 months, a small, safe comfort object — a soft toy, a small muslin square — can become a powerful sleep association. Unlike a parent's presence, the comfort object is always available between sleep cycles and helps the baby self-settle. Always ensure the object is size-appropriate and safe for the age.
Room temperature has a significant effect on sleep quality. A room that is too warm disrupts sleep and increases the risk of SIDS. Too cold causes discomfort and waking. A room thermometer is a worthwhile investment — dress the baby in one more layer than you would be comfortable wearing at that temperature, without loose blankets in the cot.
There is no single right approach to helping babies sleep — responsive settling, gradual methods, and more structured approaches all have evidence supporting them in appropriate contexts. What matters most is consistency. Inconsistent responses to night waking's — sometimes responding immediately, sometimes waiting, sometimes bringing the baby to bed — is more confusing for the baby than any single consistent approach. Choose an approach aligned with your values and your baby's temperament, and apply it consistently.
Common Myths About Baby Sleep
"Keeping the baby awake longer during the day will make them sleep longer at night."
Overtired babies produce excess cortisol that actually makes it harder — not easier — to fall asleep and stay asleep. Sleep promotes sleep. A well-rested baby who naps appropriately during the day sleeps better at night than an overtired baby who was kept awake.
"Adding cereal or solids to the bottle will help the baby sleep through the night."
Multiple studies have found no evidence that adding solid food to a bottle improves infant sleep. It is not recommended by paediatric organizations — it poses a choking hazard, can cause overfeeding, and interferes with normal swallowing development. Night waking's in young babies are developmental, not a calorie deficit.
"If my baby is not sleeping through the night by 6 months, something is wrong."
Research shows that the majority of babies — even at 12 months — still wake at least once during the night. "Sleeping through" is often defined as a 5 to 6 hour stretch, which many parents would not even consider sleeping through. Night waking is biologically normal in infants throughout the first year and beyond. It is not a sign of failure — in the parent or the baby.
"You will spoil the baby by responding to every night waking."
Consistent, responsive caregiving in infancy — including at night — builds secure attachment, which research shows leads to greater independence and emotional regulation in toddlerhood and beyond. Responding to your baby's genuine needs at night does not create bad habits. It creates trust.
Sleep Is Coming — One Night at a Time
The first year of baby sleep is not a linear journey from bad to good. It is a winding, unpredictable path with beautiful long stretches and sudden difficult nights, with regressions that arrive just when things were improving and milestones that bring unexpected disruption. Understanding what is developmentally normal at each stage — rather than measuring against an impossible standard — changes everything about how you experience it.
The nights get better. The stretches lengthen. The schedule becomes more predictable. And one morning — sooner than it feels possible from the depths of a difficult night — you will wake up and realize you slept. Properly. And your baby did too.
That morning is coming. Hang on. 💙
Save this guide and return to it at each new stage — it is designed to be your sleep reference for the entire first year. Share it with every new parent you know. 💕
Read Next:
→ Why Is My Baby Crying? 10 Reasons and How to Soothe Them
→ Baby Milestones Month by Month — What to Expect in Year One
→ Complete Newborn Care Guide for First-Time Parents (0–4 Weeks)
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