Online Biorhythm Calculator in Javascript

Online Biorhythm Calculation - Biorhythms is a theory developed between the end of the 19th and the beginning of the 20th century by Hermann Swoboda (professor of Psychology at the University of Vienna) and Wilhelm Fliess (a Berlin biologist, friend of Freud). According to this theory, considered pseudoscientific by most scientists, human life is regulated by three Cycles: one of 23 days, called Physical Cycle, determines physical conditions; one of 28 days, called Emotional Cycle, governs temperament; one of 33 days, called Intellectual Cycle, influences mind and thought. In this page the sinusoidal curves are represented by numbers associated with the days. The Cycles draw a parabola: when the curve is ascending, the Physical, Emotional or Intellectual condition improves, while in the declining phase it worsens. To make the decline of the periods more evident, the symbol » appears next to the day number. In addition to the Critical Days constituted by the peak of the curves, in which one passes from a positive to a negative phase, in this calculator four other Critical Days are highlighted with the colors red (Physical), blue (Emotional) and green (Intellect), discovered by a French researcher. These are the dates: for the Physical Cycle, days 1, 6 and/or 7, 12, 18 and/or 19 are indicated; for the Emotional Cycle, days 1, 8, 15 and 22 are indicated; for the Intellectual Cycle, days 1, 9, 17, 26 are indicated. Naturally, the period to calculate the three Biorhythms must be subsequent to the date of birth.
Notice: The birth date in the dropdown menu is sorted by year, month and day (in reverse order to the usual) to avoid errors in the setting, especially in the case of leap years. All dates are in European format.