The Moon
A full moon occurs every 29.53 days, so they add up faster than you might think.
With a lunation of 29.53 days, a 30-year-old has already seen roughly 371 full moons. A 90-year lifespan includes over 1,100.
The Moon takes 29.53 days to cycle from one full moon to the next. Divide your age in days by 29.53 to estimate how many full moons have occurred in your lifetime.
This is a counting exercise — not every full moon is visible from your location, and weather often hides them, but the astronomical count is straightforward.
Full moons ≈ (days alive) ÷ 29.53At 10,950 days (30 years): 10950 ÷ 29.53 ≈ 371 full moons.
No. 365.25 ÷ 29.53 ≈ 12.37, so most years have 12 full moons and some have a 'blue moon' — a 13th one.