Fifteen months sits in the heart of the 2-to-1 nap transition window (13–18 months). The destination: one glorious midday nap of 2+ hours, starting around 12:00–12:30. The readiness signs are consistent, not occasional: the morning nap gets fought or shrinks, or it goes fine but the afternoon nap gets refused — for two weeks or more, happily, without meltdowns.
A gentle 2→1 plan
- Week 1–2: push the morning nap later in 15–30 minute steps — 10:00, 10:30, 11:00 — letting it become the nap. Let it run as long as it wants.
- Bedtime is the safety net: while the nap sits earlier than its final home, bedtime lands early too — 6:30 PM is fine mid-transition.
- Two-nap rescue days are allowed. A brutal day mid-transition earns an old-style two-nap day. This isn't backsliding; it's shock absorption.
- Final form: nap around 12:00–12:30, bedtime settling back to ~7:00–7:30 PM once the nap anchors at midday.
Protect the nap you have left
With only one nap carrying all daytime restoration, its conditions matter more: dark room, consistent pre-nap ritual (a mini bedtime routine), and a consistent start time once the transition settles. A toddler who skips this nap has a 5:45 PM bedtime in their immediate future — plan accordingly.
Schedules are averages.
Your baby isn't.
LunaLog learns your baby's actual rhythm from the naps you log and predicts the next nap window automatically — no mental math, and it updates itself as wake windows grow. Free to start, and both parents stay in sync in real time.
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