Convert quarter (American football) to metonic cycle (Enneadecaeteris)
Selected category: time.
Definition and details for quarter (American football):
Quarter in American football is used as a unit of time equal to 15 minutes.
Definition and details for metonic cycle (Enneadecaeteris):
The Metonic cycle or Enneadecaeteris, is a particular approximate common multiple of the tropical year and the synodic (lunar) month. The Greek astronomer Meton of Athens observed that a period of 19 tropical years is almost exactly equal to 235 synodic months, and rounded to full days counts 6940 days.