"Apple's Health App Sheds Light on Your Day: Here's How"
Apple's Time in Daylight feature on the Apple Watch Series 6 or later models uses the watch's sensors to track a person's exposure to sunlight. Spending time in daylight has numerous health benefits, including boosting vitamin D production, regulating circadian rhythm, improving mood, and reducing the risk of myopia. The amount of sunlight needed varies based on factors such as skin complexion, clothing, location, and season. Morning sunlight is particularly important for aligning the body's circadian clock. While excessive sun exposure can be harmful, even 15 minutes of sun exposure without sunscreen two to three times a week is sufficient for vitamin D production.