To log baby sleep across midnight, record the date as well as the time of each sleep start and waking. A stretch from November 4 at 11:20 p.m. to November 5 at 1:10 a.m. lasts 1 hour 50 minutes. Midnight is a change of date, so there is no need to stop and restart a sleep record just because the clock passes twelve.
Check the date before changing the time
A note that says "11:20 p.m. to 1:10 a.m." relies on you remembering that the end belongs to the following day. If both entries accidentally use November 4, the order is wrong. Check the day first, then the hours and minutes.
On paper, label the record "Night of November 4 to 5." In an app, check the date attached to each entry. A heading helps you find the night later; it does not replace the dates on the actual events.
Work through a night with a waking period
Suppose these are the events you observed:
- November 4, 11:20 p.m.: baby fell asleep.
- November 5, 1:10 a.m.: baby woke.
- November 5, 1:35 a.m.: baby fell asleep again.
- November 5, 4:05 a.m.: baby woke.
The first stretch lasts 1 hour 50 minutes. The second lasts 2 hours 30 minutes. Together, they give 4 hours 20 minutes of recorded sleep.
The whole interval from the first sleep start to the last waking is 4 hours 45 minutes. That includes 25 minutes awake. Subtracting the first time from the last without checking the entries would include that waking period in the sleep total.
These are sample times for a calculation, not a suggested routine or a sleep target. If you only recorded bedtime and the final waking, those two entries cannot tell you how much of the interval your baby spent asleep.
Keep a sleep stretch separate from a daily total
The stretch from November 4 at 11:20 p.m. to November 5 at 1:10 a.m. contains 40 minutes on November 4 and 1 hour 10 minutes on November 5. Its full duration is still 1 hour 50 minutes.
For a manual table, choose a clear convention. You can file a whole night under the evening's date. If you need calendar-day totals from midnight to midnight, divide the duration at that boundary. Do not add the entire stretch to both days.
Apps may group daily totals differently. Check the underlying entries before comparing totals, and do not duplicate a sleep record to make it appear on another day.
When a time is uncertain
Keep an estimate visible as an estimate. If all you remember is "around half past one," add that note. If only the waking time is known, record it and say that the sleep start is unknown.
Before adding a missed event, check whether your partner already recorded it. For an incorrect date or an accidental duplicate, see how to fix an entry in a baby log.
Recording the night in Closeby
Closeby records sleep starts and stops as separate entries in a paired timer. The entry editor includes a date, a time, and a note. An evening start and a waking after midnight should carry the dates on which they happened.
In the morning, review the sequence in the history: sleep start, sleep end, next sleep start. Check existing entries before adding a missing one so that you do not create a second start for the same stretch.
A log records observations. It does not decide whether your baby is sleeping enough or prescribe a routine. Discuss concerns about sleep or wellbeing with your child's clinician.
Check one completed night for correct dates, known waking periods, and duplicate entries.