Use them as ranges
Think in ranges rather than exact minutes. Your baby’s cues, the previous nap and their age all matter.
Why they help
When the day is too short or too long between sleeps, naps and bedtime often become harder.
What to watch
Look for easier settling, calmer bedtimes and more predictable naps rather than perfect clockwork.
Important: baby sleep varies enormously. Avoid one-size-fits-all promises, and always prioritise feeding, growth and safe sleep advice.
Safer sleep reminder. For babies, use a firm, flat sleep surface and follow the latest safer sleep advice from the NHS and The Lullaby Trust.
Want to know what is disturbing your baby's sleep?
The Petit Nuage sleep quiz looks at age, naps, night waking and settling habits to show you what to focus on first.
Take the 2-minute quiz →Frequently asked questions
Do wake windows need to be exact?
No. They are guides, not strict schedules.
Should the last wake window be the longest?
Often, yes, but not always. Age and nap quality matter.
What if my baby shows no tired signs?
Use age and routine as a starting point, then adjust according to how sleep goes.
Reference sources: NHS baby sleep guidance · The Lullaby Trust safer sleep information. Last updated: 24 September 2026.