Turn these windows into clock times
By six months the awake stretches are over two hours, and the day is predictable enough that the windows become genuinely useful for planning. This is the age where named schedules like 2-3-4 start to be offered — though the 4-hour final window in that schedule is an hour longer than the published range for this age.
| Wake window | Length | Where it falls |
|---|---|---|
| Window 1 | 2 h | after morning wake-up |
| Window 2 | 2 h 15 min | between naps |
| Window 3 | 2 h 15 min | between naps |
| Window 4 | 2 h 15 min | before bedtime |
The same day with clock times, naps and bedtime is on the 6 month old sleep schedule page.
A six-month-old who takes 40 minutes to fall asleep for a nap is usually under-tired; one who screams before it is usually over-tired. Move the window by 15 minutes in the indicated direction, not by an hour.
Roughly 2 to 3 hours. The Tier-1 bracket for 6–8 months is 120–180 minutes.
It fits some six-month-olds and over-promises for others. Its 4-hour final window is 240 minutes, above the 120–180 the Tier-1 guidance gives for this age — which is a fair description of 2-3-4 generally: a practice-based convention, not validated guidance.
Two or three, depending on how long the naps run. Three shorter naps and two longer ones are both normal at this age.
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.