Here's why:
* Lunar Cycle: The lunar cycle, or the time it takes for the moon to go through all its phases (from new moon to full moon and back again), is approximately 29.5 days.
* Full Moon Timing: A full moon occurs roughly every 29.5 days. This means there's roughly one full moon per month.
However, there are a couple of nuances:
* Leap Years: In leap years, there are 366 days, which can sometimes result in a year having 13 full moons instead of the usual 12.
* Timing Variations: The exact timing of the full moon can vary slightly from month to month due to the elliptical orbit of the moon around Earth.
So, while there's usually one full moon per month, it's not an exact daily occurrence.