Daylight Saving Time: Switching the Clocks Is Harmful to Health

Daylight Saving Time: Switching the Clocks Is Harmful to Health

New research suggests the twice-yearly practice of changing the clocks is hazardous to health.

Predictive models indicate that a permanent switch to either standard time or daylight time would lead to significant declines in U.S. obesity rates and stroke cases.

Daylight Saving Time ends on Sunday, November 2, at 2:00 a.m. As Americans “fall back” to Standard time in preparation for the shorter, darker days to come, the debate over whether there’s any real benefit to changing the clocks continues.

While most countries do not observe daylight saving time, many parts of North America and Europe continue the twice-yearly ritual that was implemented in Germany during World War I to prolong daylight and conserve energy in the summer months.

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Author's summary: Daylight Saving Time is hazardous to health.

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Healthline Healthline — 2025-10-31