What Should You Write in a Baby Sleep Log?
By Lybadora Editorial Team4 min read
Not yet reviewed by a clinician.
No health authority publishes a sleep log format, so the useful test is whether a log can be read against what is published. The American Academy of Sleep Medicine's consensus recommends 12 to 16 hours of sleep per 24 hours including naps for infants 4 to 12 months, and 11 to 14 hours for children 1 to 2 years, which means a log needs the start and end time of every sleep, naps included, to produce a comparable total. Add where the baby slept and how the sleep ended, and record it at the time: parent recall and objective measurement of the same infant nights do not agree closely.
Explanation
A sleep log fills up fast with things that felt important at 3am and turn out to answer nothing a week later. The way to decide what belongs in it is to start from the only figure anyone has published about infant sleep, and work out what a record has to hold to be comparable to it.
Supporting evidence
The published figure is a total per 24 hours, not a schedule:
| Age | Recommended sleep per 24 hours, naps included |
|---|---|
| 4 to 12 months | 12 to 16 hours |
| 1 to 2 years | 11 to 14 hours |
| Under 4 months | no recommendation, the evidence was judged insufficient |
AASM: Recommended amount of sleep for pediatric populations
Because it is a total including naps, a log that records night sleep and skips naps cannot be read against it at all.
The second finding that shapes a log is about the recording rather than the baby. When parent-reported infant sleep is compared against objective measurement of the same nights, the two do not agree closely, and parent reports tend to run longer.
Rise & SHINE: parent-reported and objectively measured infant sleep at 6 months
What the numbers mean
Three things follow from a total that includes naps.
Every sleep needs a start and an end, because a total cannot be assembled from partial entries. A night logged as "slept well" and a nap logged as "about an hour" produce a number nobody should compare to 12 to 16 hours.
A single day's total means very little. Infant sleep varies night to night in the same baby, so the comparable unit is several days, and the recommendation itself is written as sleep obtained "on a regular basis".
And a log written in the morning is a different kind of evidence from one written at the time. Both are worth keeping. Only the second should be trusted to the minute.
What parents can observe
- Start and end of every sleep, naps included, so a 24 hour total exists.
- Where the sleep happened, cot, pram, car seat or in arms. This is the entry that most often explains an unusual duration.
- How the sleep ended, woken or self-woken, and for a feed or not.
- Night wakings, counted rather than described, and separately from how long the baby was awake.
- When the entry was made, at the time or afterwards.
What can be left out: how the sleep felt, a mood rating, a guess at the cause, and anything that is already derivable from start and end times. A log carrying a conclusion is harder to re-read honestly than one carrying only what happened.
What may explain a pattern
A short night alongside a long nap is often the same total sleep redistributed, which the day's number shows and the night's number hides. Travel, a warm room, a cold, teething, a new sibling at home, a change of carer and a day out all show up in a log as an unusual duration before they show up as anything else.
A sustained change across many days, rather than one odd night, is the shape worth mentioning at a check-up.
What parents can do
Log naps with the same care as nights, write the entry when the sleep ends rather than the next morning, keep one definition of when sleep started across everyone in the household, and read the week rather than the night.
What Lybadora does with this record
Lybadora's sleep tracker stores each sleep as its own entry with its own start and end, naps and nights in the same record, so the 24 hour total that published guidance is written in terms of is derived rather than estimated. Where the sleep happened and how it ended are fields on the entry, not notes to be read back later.
Once there are enough days behind it, Lybadora compares this baby's sleep against this baby's own recent days, never against another baby's, and names the entries a change rests on. It stops at the observation. It does not tell a parent their baby sleeps too little or too much, because a total is not a verdict, and what a change means is a question for a paediatrician.
Safety considerations
A sleep log is a record, not an assessment, and nothing in it should be used to keep a baby awake or to wake a sleeping baby to fit a total. How long a baby sleeps and how a baby sleeps safely are separate questions: safe-sleep guidance from the American Academy of Pediatrics applies to every sleep, naps included, whatever a log says. Speak with a paediatrician about breathing difficulties or pauses during sleep, unusual sleepiness, difficulty waking for feeds, or a sudden lasting change in sleep. Infants under 4 months are deliberately absent from the sleep-duration consensus cited here because the evidence was judged insufficient.
A baby sleep tracker that reads the pattern, not just the log.
Sources
- American Academy of Sleep Medicine -- Recommended Amount of Sleep for Pediatric Populations: A Consensus Statement
- American Academy of Sleep Medicine -- Pediatric Sleep Duration Recommendations
- Rise & SHINE Study (PMC) -- Associations between parent-reported and objectively measured sleep duration and timing in infants at age 6 months
- American Academy of Pediatrics (Pediatrics) -- Sleep-Related Infant Deaths: Updated 2022 Recommendations for Reducing Infant Deaths in the Sleep Environment