11/07/2026
As daylight hours shorten and temperatures drop, many Canadians begin noticing changes in their mood, energy, motivation, and overall emotional well-being. And it’s not simply a matter of disliking winter. Approximately 15% of Canadians experience the “winter blues,” while 2–3% experience Seasonal Affective Disorder (SAD), a more significant form of seasonal depression. What’s happening in the brain? Reduced exposure to natural daylight can disrupt our circadian rhythm (internal body clock) and influence serotonin and melatonin, which play important roles in regulating mood, sleep, and energy.
What can help?
Prioritize morning daylight. Even a short walk outdoors can support your body’s natural sleep-wake rhythm.
Keep moving. Gentle, consistent physical activity can support mood and emotional regulation.
💡 Consider light therapy. A clinically appropriate 10,000-lux light box may help some people experiencing seasonal depression.
Wu, C.-J., Phiri, D., Jen, H.-J., Setyowati, A., & Chung, M.-H. (2026). Light therapy in seasonal affective disorder: A systematic review and meta-analysis of randomized controlled and crossover trials. Journal of Affective Disorders Reports. https://doi.org/10.1016/j.jadr.2025.101021