Time in Daylight is the estimate of the amount of time spent in sunlight. It promotes proper eye development and helps reduce the risk of Myopia in children. Moreover, it offers additional benefits to overall physical and mental health. The Time in Daylight feature is also available on iOS 17, iPadOS 17, and watchOS 10. An Apple Watch running watchOS 10 can measure the time spent in daylight using the ambient light sensor. You can manually log this date and also view this data in the Health app on your iPhone or iPad.