The Best Time to Get Sunlight
Within ~30 minutes of waking. Morning light is the single most powerful signal for your body clock — and it is free. Here is when to get it.
Your time
7:15 AM
Get 10 minutes of outdoor light. It anchors your entire body clock and sets up a sharper, more energized day.
The science
Bright light early in your day tells your brain’s master clock that the day has begun, advancing your rhythm so you feel alert sooner and get sleepy at the right time that night.
Aim for 10 minutes of outdoor light within about 30 minutes of waking (more on overcast days). That timing is anchored to your wake time — the tool pins it for you.
Frequently asked questions
Does light through a window count?
Outdoor light is far brighter than indoor light, even on a cloudy day — glass also filters some of the useful wavelengths. Getting actually outside is much more effective.
How long do I need?
About 10 minutes on a sunny morning, longer (20–30 min) when it is overcast. Consistency matters more than perfection.
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