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Data Suggests Uptick in Car Crashes During Daylight Saving

Advancing clocks by one hour disrupts circadian rhythms, causing sleep loss, mood changes, and higher crash risks, with population-wide effects lasting beyond the first day, experts say.

  • At 2:00 a.m. on Sunday, 8 March, most of America sets clocks forward for Daylight Saving Time, losing one hour of sleep.
  • Because the circadian rhythm runs on a roughly 24-hour cycle, advancing the clock creates a mismatch between the internal clock and the clock on the wall, explained Sabra Abbott, MD, PhD.
  • A Michigan hospital study cited by the American Heart Association found heart attacks jump 24% on the Monday after clocks spring forward, while Finnish researchers reported an 8% rise in ischemic strokes during the first two days.
  • A University of Colorado Boulder study found a roughly 8% spike in fatal crashes during the week after DST, peaking during Monday morning commutes, affecting drivers.
  • Health experts recommend shifting bedtime earlier by 15 minutes and getting morning light, while H.R. 7378 proposes a 30-minute permanent shift, and 54% want DST ended, Coffey said.
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21 Articles

The Toronto StarThe Toronto Star
+7 Reposted by 7 other sources
Lean Left

How springing forward to daylight saving time could affect your health

WASHINGTON (AP) — Most of America “springs forward” Sunday for daylight saving time. Losing that hour of sleep can do more than leave you tired and cranky the next day; it also could harm your health.

·Toronto, Canada
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Spectrum Local NewsSpectrum Local News
+2 Reposted by 2 other sources
Center

How the switch to daylight saving time affects health

Moving clocks ahead by an hour means many people get less sleep, which impacts focus, reaction time and mood.

·United States
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IBTimes broke the news in United States on Thursday, March 5, 2026.
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