How the schedule is built
Start at your morning wake time. The first wake window comes from the age-based norm (the same one the Wake Window Calculator returns). The end of that window is the first nap start time. Nap length is the daily nap total divided by the number of naps. After each nap, another wake window. Before bedtime we use the longer "last awake window" - that is what gets the baby to bedtime tired-enough but not exhausted.
The bedtime in the result is the same value the Bedtime Calculator would give: morning wake + 24h - night sleep need. The schedule reconciles naps so the bedtime falls in the expected window. If the nap math drifts (a transition month, for example), we use age-appropriate fallback timing rather than forcing the wrong number of naps.