It's dark outside, but don't forget to see the light.

Seeing the morning light slows the onset of illnesses such as insomnia, cognitive slowdown, and depression. It helps your body’s circadian rhythm, which governs the timing of the brain’s release of stress hormones and other hormones that keep you alert during the day and put you to sleep at night.

The nerve cells in your eyes send messages to the brain’s internal clock. Maybe go outside without sunglasses when daylight is bluest to set your body’s clock!