Wake windows may stretch unpredictably
Why some days feel longer than others
By The Millie's Team · Parenting Notes
Around week fourteen, some days your baby seems ready for sleep quickly, and other days not at all. This variation is part of rhythm building rather than a setback.
What is happening
Your baby's sleep needs are shifting. The clear, short wake windows of the early weeks are gradually being replaced by longer, more variable awake times. On a busy day, your baby might tire quickly. On a quiet day, they may stay alert much longer than expected.
Is this normal
Yes. Day to day variation is one of the most common parts of this stage. Sleep at this age is influenced by feeds, mood, light, activity, and how the previous night went. Trying to follow a strict wake window often feels frustrating.
What you may notice
- Some naps starting much earlier than expected
- Other days when your baby resists sleep for a long time
- Different nap lengths across the day
- Settling that works one day and not the next
What helps right now
- Watching tired cues such as staring, slowing down, or rubbing
- Keeping the lead up to sleep calm and familiar
- Adjusting the day rather than forcing the schedule
- Letting one off naps be one off naps
What to expect next
Over the coming weeks, awake windows will gradually settle into a looser daytime pattern. Most babies start to show clearer nap preferences in their fourth and fifth months. For now, following your baby day by day is more useful than following a clock.