The transition from two naps to one is one of the most eagerly anticipated — and most commonly mistimed — milestones in baby sleep. Many parents attempt it at 12 months because that's what they've heard, and spend weeks managing overtiredness, short naps, and miserable evenings.
The reality: most babies aren't ready for one nap until 13–18 months, with the average closer to 15–16 months. The 12-month mark is a scheduling myth, not a developmental reality.
Signs your baby is ready to drop to one nap
Look for a consistent combination of these signals over at least two weeks — one bad nap day doesn't indicate readiness:
- Resisting one or both naps — taking 30+ minutes to settle, or fighting sleep entirely for one nap most days of the week
- Naps shortening without overtiredness — naps capping at 20–30 minutes and your baby seeming fine on waking
- Early morning waking — consistently waking significantly earlier than usual
- Night sleep disruption — new night waking or difficulty settling at bedtime
- Long comfortable wake windows — staying awake 4–5 hours without tired cues
The key word is consistently. A sleep regression can produce the same surface symptoms — the difference is a regression is temporary, while genuine readiness is sustained over 10–14 days.
Signs your baby is not yet ready
The most common mistake is confusing the 12-month (or 15-month) sleep regression with nap-transition readiness. A baby who still shows genuine tired cues and falls asleep readily for both naps when given the opportunity is not ready to drop one yet.
How to handle the transition
When you're confident your baby is genuinely ready, the transition typically takes 4–6 weeks.
Push the morning nap gradually. Rather than jumping straight to one nap, delay the first nap by 15–20 minutes every few days until it consolidates into a single mid-day nap. This reduces the overtiredness spike of a cold-turkey approach.
Bring bedtime earlier. The single nap is typically shorter than two combined, and the longer afternoon wake window means your baby will need an earlier bedtime temporarily — sometimes as early as 6pm — to avoid overtiredness.
Expect 4–6 weeks of adjustment. The transition involves some irregular days — occasional second naps needed, early waking, shorter naps. Consistency through the adjustment period matters more than perfection.
Using data to time it right
The most reliable way to know if your baby is ready — and to track the transition — is to log their sleep. Two weeks of logged nap times and wake windows shows you a pattern that individual difficult days obscure.
Lullwise tracks nap timing, wake windows, and total sleep over time. When the second nap consistently appears in your data as skipped or very short — over many days, not just one — that's a much clearer readiness signal than memory alone can give you.