Morning sunlight plays a crucial role in regulating your body's internal clock, known as the circadian rhythm. Exposing your eyes to natural light shortly after waking acts as a reset button, suppressing melatonin and signaling your body to be awake. Consistent morning light exposure has been shown to improve sleep quality, mood, and daytime alertness.source https://timesofindia.indiatimes.com/life-style/health-fitness/health-news/reset-your-sleep-cycle-could-a-few-minutes-of-morning-sunlight-fix-your-sleep/articleshow/124347062.cms