Data
All 10 datasets
Total sleep by age
Night sleep barely moves. Naps do all the shrinking.
- Night sleep
- Daytime naps
Total sleep falls from 14.8 h at 3 months to 12.5 h at 18 months. Almost the entire drop is naps, 3.8 h down to 1.7 h.
Night wakings by age
A quarter of babies still wake twice a night, at every age.
The average falls with age, but the spread does not close: the p75 line sits at 2+ wakings throughout. Logged wakings only, so read it as a relative signal.
The nap transition ribbon
The whole 4 → 3 → 2 → 1 journey, in one picture.
- 1 nap
- 2 naps
- 3 naps
- 4+ naps
Share of days at each nap count. Every column sums to 100%, so you can read a whole population mid-transition.
Bedtime by age
Bedtime hardly shifts all year: 8:15 to 8:30 pm.
The median barely moves, but families spread widely: the earliest 5% are down by 7 pm, the latest 5% closer to 10 pm.
Morning wake-up by age
Babies are alarm clocks. 7:10 to 7:30 am at every age.
Wake-up time is the single most stable figure in the dataset. Pair it with bedtime to read the whole sleep window.
Sleep moving into the night
Daytime sleep halves as a share, 26% down to 14%.
Consolidation is a share story, not a total-hours story. Babies move sleep into one long night rather than sleeping less.
Night wakings across the year
40% more night waking in January than in June.
Ages 4 to 12 months, both hemispheres pooled, so the winter signal is directional rather than age-adjusted. It is a strong pattern, not a controlled one.
Bedtime around the world
Norway is down at 7:46 pm. Italy at 9:08 pm.
- Bedtime
- Wake-up
Total sleep is remarkably similar everywhere (13.3 to 13.8 h). Bedtime culture is not. Later bedtimes come with correspondingly later wake-ups. Country is inferred from app geolocation.
When each nap goes
4 → 3 at 6 months. 3 → 2 at 8.5. 2 → 1 at 13.3.
Median with the typical range (p25 to p75). The ranges are wide: the 2-to-1 transition normally lands anywhere from 12 to 15 months.
How much babies differ
At 6 months the middle half nap between 2.4 h and 3.3 h.
A full hour separates the middle half of babies at the same age. If your baby does not match an average, the average is the problem.
How the data was made
Only qualified days: stretches of 7+ consecutive days with a stable nap count, so these are settled routines rather than one-off days. Every figure averages within each baby first, then across babies, so every baby gets one vote.
Jun 2024 to Jun 2025 (seasonality: Jan 2025 to Apr 2026). Every number is aggregated. No individual baby or family is identifiable.
Napper analytics (Athena), aggregated