How long your baby can stay awake, by age

Most sleep problems at any age trace back to one number: how long your baby has been awake. Too short and they aren't tired enough. Too long and they're overtired and wired, which looks identical to not tired at all.

This is the reference for that number — every age from newborn to two years, with the sleepy cues that tell you the chart is right. Free, 10 pages, downloadable straight away.

What's inside

Why wake windows matter — The two forces driving every nap, in plain terms
Reading your baby — The sleepy cues that come before crying, and the ones people miss
0–3 months — Windows by week, typical naps, a sample daily rhythm
4–6 months — Where the windows land once the four-month change has happened
7–12 months — The two-nap era, and what shifts as the third nap fades
12–24 months — The one-nap toddler, and the bedtime buffer that keeps it working
Common mistakes — Both directions, because too short causes as much trouble as too long
Quick emergency reference — A thirty-second walkthrough for when you can't tell

Screenshot the age page for your baby and keep it on your phone. That's what it's for.