Biorhythm: Calculate your biorhythm. Just enter your name, birthday and the date for which you'd like to know y

Description: Our physical biorhythm cycle completes one life cycle in 23 days. Our emotional biorhythm cycle lasts 28 days, and our intellectual biorhythm cycle lasts 33 days. At mid point and end point in each cycle, they sharply move back to zero point and change polarity. The day a cycle changes polarity is called a transition day (also called a critical day, or caution day).