Why Some People Get Sleepier in Winter Afternoons — Circadian Drift Explained
Why Some People Get Sleepier in Winter Afternoons — Circadian Drift Explained
IN · Published Dec 19, 2025
• Circadian drift is when your body's internal clock shifts due to less sunlight in winter, making you feel sleepier.
• Less sunlight and vitamin D deficiency contribute to increased melatonin production and winter fatigue.
• Maximize sunlight exposure, maintain a sleep schedule, and eat a balanced diet to combat winter sleepiness.
Irresistible urge to nap during winter afternoons
Ever feel that irresistible urge to nap during winter afternoons? You’re not alone! It’s a common phenomenon, and a big reason behind it is something called 'circadian drift.'
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