Daylight Saving Time has scientifically established negative effects on health and economy
Multiple studies and reviews support the claim that Daylight Saving Time transitions have negative effects on health, notably increasing mortality risks, ischemic strokes, sleep disruption, and cognitive deficits.
The vast majority of provided papers—including time-series analyses, systematic reviews, and large scoping reviews—consistently show that the acute disruptions caused by Daylight Saving Time transitions are linked to negative health outcomes such as increased mortality, sleep disturbance, and cognitive impairments. While one study (paper 8) found no association with CVD mortality in a specific demographic, the weight of the robust epidemiological and review evidence (papers 0, 2, 3, 10, 11) strongly favors the claim.
Michael Poteser, Hanns Moshammer. Daylight Saving Time Transitions: Impact on Total Mortality. 2020. https://doi.org/10.3390/ijerph17051611
Paper 0 finds a significant increase in daily total mortality during the week following the spring DST transition.
V. A. Dulskyi, E. M. Mozerova. DAYS OF THE WEEK, SEASONS OF THE YEAR, CHANGE TO DAYLIGHT SAVING TIME, AND CARDIOVASCULAR MORTALITY IN MEN. 2014. https://doi.org/10.15829/1728-8800-2014-1-49-53
Paper 8 found no significant associations between cardiovascular disease mortality and changes to daylight saving time in a prospective study of men.
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A. Romigi, Valentina Franco, E. Scoditti, Giulia Milan, Francesco Ceriello, D. Centonze, Sergio Garbarino. The effects of daylight saving time and clock time transitions on sleep and sleepiness: a systematic review.. 2025. https://doi.org/10.1016/j.smrv.2025.102161
Paper 2 reports a systematic review showing adverse effects of DST transitions on sleep duration, quality, and daytime sleepiness.
Samoni Nag, Alfred Brian Yu, Stephen Mitroff. How is Daylight Saving Time still a thing?: Disruptions from Daylight Saving Time transitions lead to cognitive performance deficits. 2021. https://doi.org/10.31234/osf.io/37svc
Paper 3 demonstrates that DST transitions lead to cognitive performance deficits and increased errors.
Daylight Saving Time and Health: Scoping Review with ☸️SAIMSARA. 2026. https://doi.org/10.62487/saimsara13cb2638
Paper 10's scoping review links DST transitions to short-term circadian disruption, sleep loss, and measurable increases in mortality and safety risks.
Jussi O T Sipilä, Jori O Ruuskanen, Päivi Rautava, Ville Kytö. Changes in ischemic stroke occurrence following daylight saving time transitions.. 2016. https://doi.org/10.1016/j.sleep.2016.10.009
Paper 11 shows an increased risk of ischemic stroke hospitalizations immediately following DST transitions.
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