+22 minlater bedtime on Christmas Eve 2025 than on the nights around it. New Year’s Eve moved it by 16.
Holidays move babies’ evenings, and Christmas Eve moved them most. The next morning wake-up was about 8 minutes later and that night about 19 minutes shorter, and bedtimes were back to normal within a day or two.
Complete days rebuilt from parents' own logs (a day counts when a parent logged the wake-up, every nap and bedtime), local time, babies aged 3 to 18 months, all countries pooled; no settled-routine filter. For each baby and date, bedtime minus that baby's own average bedtime over the other nights from seven days before to seven days after (at least four such nights), then averaged across babies. Christmas Eve 2025: +22.1 minutes (median +15.4), 101,277 babies. New Year's Eve 2025: +15.8 minutes (median +9.8), 101,704 babies. Wake-up on 25 December: +8.4 minutes; the night from bedtime to wake-up, 24 to 25 December: -18.8 minutes. Other nights in the window stayed within about 5 minutes.