Afternoon sunlight can have a positive impact on behavioral patterns by influencing the body’s internal clock, known as the circadian rhythm. The circadian rhythm helps regulate sleep, mood, and overall daily activity by syncing the body’s functions with the natural light-dark cycle. Exposure to sunlight, especially in the morning, acts as a strong signal to reset this internal clock, but afternoon light also plays a role in maintaining balance throughout the day.
When people receive natural light in the afternoon, it can help slow down the circadian cycle, which may promote relaxation and prepare the body for a restful evening. This effect can improve mood and reduce feelings of stress or irritability, contributing to better behavioral patterns. Conversely, lack of sufficient daylight exposure, particularly in the afternoon, can disrupt this rhythm, potentially leading to mood disorders or difficulties in maintaining regular sleep schedules.
Research shows that light exposure influences the production of hormones like melatonin and serotonin, which regulate sleep and mood. During shorter daylight periods, the body produces more melatonin and less serotonin, which can negatively affect behavior and emotional well-being. Afternoon sunlight helps balance these hormones by providing natural cues that support healthy circadian function.
While morning sunlight is often emphasized for its role in resetting the circadian clock, afternoon sunlight exposure also contributes to overall circadian health by reinforcing the timing of internal processes. This can lead to improved behavioral outcomes such as better sleep quality, enhanced mood, and more stable daily routines.
In summary, getting some sunlight in the afternoon can support the body’s natural rhythms and improve behavioral patterns by helping regulate hormonal balance and circadian timing.
Sources
https://scotscoop.com/circadian-research-points-to-healthier-solution-to-daylight-saving-debate/
https://www.clinicaladvisor.com/features/daylight-saving-time-health-risks/
https://crownlightinggroup.com/psychology-of-light-combating-seasonal-affective-disorder-in-workspaces/
https://www.nature.com/articles/s41598-025-22542-w
