Can sunlight help you sleep at night?

Meet Aki. She feels tired each morning. At lunch, she walks outside. The sky is bright. This light helps her body clock. Your body clock tells you when to sleep. (archive.cdc.gov)

Now, here is the turn. Daylight can help your sleep at night. Morning light is very useful. But bright light late at night can make sleep harder. (cdc.gov)

So, open your curtains after waking. Take a short walk in daylight. Then keep your room dark at night.

Bright days and dark nights guide your body.