Your biorhythm today.
Physical, emotional, and intellectual cycles — computed from the exact number of days you've been alive, not a guess.
Biorhythm theory holds that three cycles run on fixed lengths from your birth: physical (23 days), emotional (28 days), and intellectual (33 days). Each is a real sine wave computed from your birth date to today — a pseudoscience by scientific standards, but the math itself is exact, not randomized.
From the exact number of days between your birth date and today, run through three fixed-length sine waves: physical (23 days), emotional (28 days), intellectual (33 days). It's pseudoscience by convention, but the calculation itself is real math, not randomized.
A day where one or more cycles cross zero — the line between the high and low half of that cycle. Traditionally read as an unstable, harder-to-predict day for whichever area is crossing.