Answer:
1. Improves your sleep
Your body creates a hormone called melatonin that is critical to helping you sleep. Because your body starts producing it when it’s dark, you usually start to feel sleepy two hours after the sun sets, which is one of the reasons our bodies naturally stay up later in the summer.
Research indicates that an hour of natural light in the morning will help you sleep better. Sunshine regulates your circadian rhythm by telling your body when to increase and decrease your melatonin levels. So, the more daylight exposure you can get, the better your body will produce melatonin when it’s time to go to sleep.
Related: How to Choose Sunscreen and When To Reapply
2. Reduces stress
Melatonin also lowers stress reactivity and being outside will help your body naturally regulate melatonin, which can help reduce your stress level. Additionally, because you're often doing something active when you’re outside (walking, playing, etc.), that extra exercise also helps to lower stress.
3. Maintains strong bones
One of the best (and easiest) ways to get vitamin D is by being outside. Our bodies produce vitamin D when exposed to sunlight—about 15 minutes in the sun a day is adequate if you’re fair skinned. And since Vitamin D helps your body maintain calcium and prevents brittle, thin, or misshapen bones, soaking in sun may be just what the doctor ordered.
4. Helps keep the weight off
Getting outside for 30 minutes sometime between 8 a.m. and noon has been linked to weight loss. There, of course, could be other factors to this, but it seems there's a connection between sunlight in the early morning and weight loss.
5. Strengthens your immune system
