How often is there a full moon on Halloween and when is the next one due to occur? Explore the answers below along with more lunar facts.

While most Halloween content contains spooky images of a full Moon, the lunar phase is rarer than you might think…

Photo by Shannon Finney/Getty Images

When does a full Moon occur?

The full Moon is the lunar phase that occurs when Earth is located between the Sun and the Moon.

Therefore, the lunar hemisphere facing Earth is completely sunlit and appears as a circular disk, making the Moon appear entirely illuminated from Earth’s perspective.

A full Moon happens roughly every 29.5 days, the length of time it takes for the Moon to go through one whole lunar phase cycle, according to Royal Museums Greenwich.


How often is there a Halloween full Moon?

So, how rare is it for this lunar phase to fall on Halloween?

Although the spooky season may be associated with a fancy full Moon, this is not a common occurrence and only happens every 18 to 19 years, as per The Old Farmer’s Almanac.

The year 2001 saw a full Moon, and after that, it wasn’t until 2020!

Last year’s full Moon was the second occurrence of October 2020, as the first took place on 1 October, meaning that the Halloween full Moon was named a Blue Moon.

Photo by Michael Ciaglo/Getty Images

Many referred to this as a Hunter’s Blue Moon on Halloween since it was also a Hunter’s Moon; the next full moon after the Harvest Moon on 1 October.

When is the next one due?

As exciting as this all does sound, don’t hold your breath because the next full Moon is thought to occur in 2039.

Cornwall Live reports that there will only be six full moons on Halloween in the entire 21st century, the next four are showing in 2039, 2058, 2077 and 2096.


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