Seven to twelve months
7-12m · Updated 2026-08-23
This is the most orderly stretch of the first two years — enjoy it. The day settles into a shape so common it's almost a uniform: wake around 6–7 a.m., nap near 9, nap near 1, bed between 6 and 8 p.m. By nine months, 91% of babies take exactly two naps, and the pooled reference data (Galland's systematic review) shows night sleep holding steady around eleven hours. If the first half-year was weather, this is climate.
What changes in this window
- The third nap dies. It goes from 16% of babies at six months to 1% at twelve, usually gone by nine. Its funeral is paid for with an earlier bedtime — when the catnap drops, bed moves earlier, sometimes a lot earlier, and everything else holds. A third nap that persists past nine months is usually a sign the bedtime is too late, not that your baby is special.
- Night feeds end, biologically. By nine months, night feeding is no longer a nutritional need. Wakings that continue past that point are about how sleep restarts, not hunger — which is actually good news, because it means they're solvable without the fridge.
- The afternoon becomes the marathon leg. Once the third nap is gone, the last-nap-to-bedtime stretch is the longest wakeful period of the day — and the one to protect with the earlier bedtime when it sags.
- Feelings arrive at night. Separation anxiety starts around six months and peaks at eight to nine, right on top of the classic 8–10-month regression window and a burst of skill practice (crawling, pulling to stand — sometimes literally in the crib, at 3 a.m., like a tiny determined mountaineer). A settled sleeper who suddenly protests at this age is most often developing, not regressing.
The honest baseline
Even now, normal is wider than the internet admits: in the pooled data, infants this age still average around one night waking, and a bad week during a regression window is within the expected range. The stable two-nap day is the pattern; it was never a promise of silence.
Two Weissbluth red flags worth knowing, because they point at the schedule rather than the child: still three naps well past nine months, or down to one nap well before twelve — both usually mean the timing frame needs adjusting, and the first lever to pull is always bedtime, earlier, in 20-minute steps.
What the app does at this age
This is the era NaniNani's forecast likes best: two stable nap positions to learn, a clear bedtime anchor, and enough regularity that the tide's shape repeats day to day. Expect the most confident water of the whole first year. When it wobbles anyway, check the calendar before the settings — an 8–10-month wobble is usually a milestone with a start and an end, and the app's job is to keep saying so: this is development, on schedule, passing through.
Where this comes from
- Marc Weissbluth, Healthy Sleep Habits, Happy Child (4th ed.). Read in full; wake-window rules, turning points of sleep maturation, second-wind physiology.
- Alexis Dubief, Precious Little Sleep. Read in full; wake-time tables, the sleep-drive balloon, nap-transition mechanics.
- Barbara Galland, Barry Taylor, Dawn Elder & Peter Herbison, "Normal sleep patterns in infants and children: a systematic review of observational studies", Sleep Medicine Reviews 16:213–222 (2012). Pooled reference values: sleep duration, night wakings, latency, longest sleep period by age band.