Late-winter SAD makes your brain stupid. Light therapy and task batching help.

Late-winter SAD causes measurable drops in concentration and working memory, but you can maintain productivity with targeted strategies like morning light exposure and breaking tasks into smaller chunks.

The mechanism is straightforward: shorter days and less sunlight mess with your circadian rhythm, serotonin production, and dopamine regulation. The result is brain fog — trouble focusing, forgetting what you were doing, and feeling like every task requires twice the effort. This isn’t laziness; your prefrontal cortex is literally running on fewer resources.

What actually helps:

Light therapy box first thing in the morning (10–30 minutes, 10,000 lux, within 30 minutes of waking) is the single most effective intervention. It resets your internal clock and improves alertness within a week.

For work itself: stop fighting the fog head-on. Batch your most cognitively demanding tasks for late morning (