Hi in the Book of Genesis it says that God used the luminaries to be a guide in time for people such as seasons and years and things of that nature, Genesis 1:14-19. The human body is equipped with an internal clock that keeps time within your system, you eat sleep wake up all at a certain time or around the same time this is habit formed. Humans themselves further developed the system such as names and numbers for days and the hour and time of a 24-hour period, the development of systems shows that humans were meant to follow time.
Genesis 1:14
Modern English Version (MEV)
14 And God said, “Let there be lights in the expanse of the heavens to separate the day from the night, and let them be signs to indicate seasons, and days, and years.