GoKawiilCMAJ Analysis Says Permanent Standard Time Beats Permanent Daylight Saving for Health
A study published in the Canadian Medical Association Journal, led by UBC's Professor Raymond Lam, compared the health effects of permanently adopting standard time versus permanently adopting daylight saving time. The researchers concluded that permanent standard time better aligns with human circadian biology, citing the importance of morning light exposure for sleep and mood, especially in winter when permanent daylight saving would delay sunrise by an hour in cities like Toronto and Calgary.
GoKawiil's interpretation of the reporting above, not reported fact.
As many jurisdictions move toward ending the twice-yearly clock change, this research could influence which permanent system lawmakers choose, since the debate has largely assumed daylight saving time is the default preference. The findings suggest that delayed winter sunrises under permanent daylight saving could worsen sleep and mood problems for people with early schedules, though the researchers frame this as a risk rather than a certainty. The study may shift policy discussions toward standard time as the circadian-friendly option.
- CMAJ-published analysis favors permanent standard time over permanent daylight saving time for health reasons.
- Permanent daylight saving would delay winter sunrise by about an hour in cities like Toronto and Calgary.
- Researchers say morning light is crucial for keeping the body's internal clock synced, affecting sleep, mood and productivity.
Carex Day-Light Classic Plus Light Therapy Lamp — Since the article highlights how delayed morning light under permanent daylight saving could disrupt circadian rhythms and worsen mood, a bright light therapy lamp can help simulate morning sunlight exposure during darker winter mornings. It's a practical tool for anyone trying to keep their body clock on track regardless of which time system prevails.
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Published there as: “Canadian Analysis: Permanent Daylight Saving Harms Sleep and Mental Health”
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