BIOCLOCK

Biological time clock: is a time clock that simulates the human body circadian rhythm  and reflects the beginning of the night at sunset and its end at sunrise and the beginning of the day at sunrise and its end at sunset, in addition to the process of speeding up and slowing down the clock hands during the night and the day according to the length of the day or night, so that the time displayed on the clock face is always fixed and equals 12 night hours and 12 day hours in a constant way in all countries of the world that have clear day and night throughout the year.