Natural sunlight for at least 20 minutes in the morning is important for a few reasons:

Regulation of circadian rhythms: Exposure to natural sunlight in the morning helps to regulate our circadian rhythms, which are responsible for regulating our sleep-wake cycles. Our bodies rely on natural sunlight to set our internal clocks, and exposure to sunlight in the morning helps to signal to our bodies that it's time to wake up and start the day.

Vitamin D production: Sunlight is also a natural source of vitamin D, which is essential for strong bones and a healthy immune system. When sunlight hits our skin, it triggers the production of vitamin D in our bodies. Getting natural sunlight in the morning can help boost our vitamin D levels and support overall health.

Mood improvement: Exposure to natural sunlight in the morning has been shown to improve mood and energy levels. Sunlight triggers the release of serotonin, a neurotransmitter that helps regulate mood and promotes feelings of well-being.

Improved productivity: Exposure to natural sunlight in the morning has been linked to improved productivity and alertness throughout the day. When we start our day with natural sunlight, it can help us feel more awake and alert, which can translate to improved focus and productivity.

Overall, natural sunlight in the morning is an important aspect of maintaining our physical and mental health, regulating our internal clocks, and supporting productivity and energy levels throughout the day.