At twelve months most babies are still on two naps, despite what the "one nap at one year" convention suggests. Daycare timetables push toward a single nap around now, which is a scheduling reality rather than a developmental one — and it is why so many one-year-olds go through a rough few months.
Wake at 7:00 AM, 2 naps of about 1 h 10 min each, bedtime at 7:00 PM. Nap times are windows, not deadlines — anywhere inside one counts.
| Part of the day | Clock time | Notes |
|---|---|---|
| Wake | 7:00 AM | |
| Nap 1 | 10:00–11:10 AM | 3 h awake first |
| Nap 2 | 2:25–3:35 PM | 3 h 15 min awake first |
| Bedtime | 7:00 PM | 3 h 30 min awake first |
The planner adjusts it to your baby's own wake time, bedtime, and birthday — including corrected age if your baby was born early.
The sample day above lands at 2.25 h of daytime sleep and 12 h overnight — 14.25 h in 24. A baby at the bottom of the range who wakes up happy is not short on sleep; the range is wide because babies are.
The real 2-to-1 transition lands between 13 and 18 months. When it does, expect three to four weeks of alternating between one-nap and two-nap days, with an early bedtime on the one-nap ones.
Want the wake windows on their own, without the whole day around them? See 12 month old wake windows.
Two, for most. The guidance allows 1–2 naps at 12–17 months, but the typical transition age is 13–18 months. One nap at exactly twelve months is early, not late.
Bridge it at home: an earlier bedtime on daycare days, and keep two naps at weekends until the transition is genuinely done. A one-nap day with an early bedtime is not a failed day.
1.5–3 hours during the day and 10–12 hours at night. The daytime range is wide because it straddles the transition from two naps to one.
Tier 1 — evidence-based The ranges on this page are the consensus sleep totals and nap counts below. The phrase "wake window" itself is a Tier 2 practice-based heuristic: it does not appear in the pediatric sleep-medicine literature, so treat the window lengths as a starting estimate and let your baby's sleepy cues override them.