The "time of day" refers to the specific hour and minute within a 24-hour cycle. It is commonly divided into segments such as morning, afternoon, evening, and night. Each segment has distinct characteristics, such as the rising of the sun during the morning and the setting of the sun in the evening, which influence daily activities. Time of day is measured using clocks and can be expressed in various formats, including 12-hour and 24-hour systems. The position of the Earth relative to the Sun determines the time of day, affecting light levels and temperature in different regions.