Moving into daylight saving time is linked to poorer sleep
A review connected the move into daylight saving time with worse sleep and greater sleepiness, especially in spring and among people with evening chronotypes.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
The review found an association between the transition to daylight saving time and poorer sleep duration and quality, alongside greater daytime sleepiness. Effects appeared more evident in spring and among evening chronotypes. However, the findings varied, and differences in methods and outside influences prevent a firm conclusion about the transition's impact.
Methods differed across studies, and external influences complicated interpretation. This abstract-based explanation cannot establish causation or determine a reliable size of the association for any particular age group.
What researchers measured
Researchers brought together studies that measured sleep both objectively and through people's reports. They considered sleep duration, sleep quality, and daytime sleepiness, rather than treating all sleep-related outcomes as a single measure.
Questions the abstract leaves open
The abstract does not report how much sleep changed or how long any disruption lasted. It also identifies unanswered questions about transitions in both directions and comparisons between permanent daylight saving time and standard time.
The original publication
The effects of daylight saving time and clock time transitions on sleep and sleepiness: a systematic review.
Romigi A, Franco V, Scoditti E et al.
Sleep Med Rev · 2025
- PubMed ID
- 41110263
- Record checked
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