When Is the Next Black Moon?
A Black Moon is a special kind of Moon phase. But, if you want to spot a Black Moon, you're out of luck: they are invisible.
Black Moon is not a well known astronomical term. In recent years, the term has been made popular by social media, astrologers, and followers of the Wiccan religion.
No Single Definition
There is no single accepted definition of a Black Moon. The term has been commonly used to refer to any of the following phenomena associated with the New Moon:
Third New Moon in a season of four New Moons: These Black Moons are a little rarer, and occur about once every 33 months. We divide a year into four seasons—spring, summer, fall (autumn), and winter. Usually, each season has three months and three New Moons. When a season has four New Moons, the third New Moon is called a Black Moon. This is the exact counterpart to the original definition of a Blue Moon, except that Blue Moons are Full Moons.
- No New Moon in February: About once every 19 years, there is no New Moon in February. This can only happen in February, as this is the only month which is shorter than a lunar month (lunation). When this occurs, both January and March have two New Moons, instead of just one.
- No Full Moon in February: About once every 19 years, February does not have a Full Moon. Instead, there are two Full Moons in January and March, also known as a double Blue Moon.
Invisible New Moon
Significant in Pagan Culture
Black Moons hold special significance to people who practice certain forms of Pagan religions and who believe certain actions become more potent when performed on the night of a Black Moon.