Build your baby's daily schedule.

Three common causes. One, the wake window is too short — babies under 4 months especially need active soothing to fall asleep, not necessarily a longer awake interval. Two, the wake window is too long and overtired hormones (cortisol) are blocking sleep. Three, the sleep environment has shifted — too bright, too warm, no white noise. Try the lower bound of the wake window for a few days first. If that fails, try the upper bound. If both fail, look at environment. The wake-windows-by-age tool has more detail on this.

Under 6 weeks, yes — wake for feeds every 3 to 4 hours during the day, including from naps, until your pediatrician says otherwise. Past 6 weeks, most babies self-regulate well enough that you can let them sleep through a feed if they're gaining weight on track. If you're breastfeeding and worried about supply, the cadence still matters during the day; nighttime is where you can let it stretch.

Most often between 13 and 18 months. Signs your child is ready: the second nap pushes bedtime later than 8 PM, both naps shorten to under 45 minutes, or your child fights the second nap entirely on most days. The transition itself takes 4 to 6 weeks. During the gap, an earlier bedtime (around 6:30 PM) bridges the missed afternoon sleep. The schedule will keep showing 2 naps until you cross 18 months on this tool — manually drop one if you've made that transition earlier.

Breast milk digests faster than formula — the rough rule is breastfed babies feed every 2 to 3 hours and formula-fed every 3 to 4. Mixed-fed babies fall in between. The total daily intake ends up similar; the spacing differs. This affects the schedule shape but not the wake-window timing — sleep cycles run independent of feeding type.

Yes. The page is set up to print cleanly — hit Cmd-P (or Ctrl-P) and you'll get just the schedule timeline without the navigation, form, or recommendations cluttering the page. Stick it on the fridge as a starting reference for the week. If a true PDF download is something you'd use, let us know — we're considering adding it as a future feature.

Wake windows are consolidated across Mindell & Owens 3rd ed., AAP 2016 sleep duration consensus, and the National Sleep Foundation 2015 ranges. The same data underpins the wake-windows-by-age tool. Total daily sleep ranges come from the AAP statement: 14–17h for newborns, 12–15h for infants 4–11 months, 11–14h for toddlers 1–2 years.