Biorhythm calculator and calendar description

Biorhythm is a regular alternation of physical and mental states of a person. Since birth, a number of events and conditions repeat in the life of a person, depending on many influences.

Just as the night and day alternates in a regular rhythm depending on the rotation of the Earth on its axis, as the seasons change, it is also possible to describe a number of cyclically recurring states not only in the universe, but also in human life.

There is e.g. the breathing rhythm, the heartbeat or the 28 days menstrual cycle. Since the moment of birth until death, biorhythms influence the individual cells in our body and our brain activity. The biorhythms affect more or less the human existence for the whole life.