July 31, will mark a rare occurrence for Earth’s natural satellite — a phenomenon known as a Black Moon. The rare celestial event will occur tomorrow in North America, marking the first occurrence since 2016. The rest of the planet will see the black Moon on August 30.
Although there is no one single definition of a black Moon, according to Time and Date, it is most commonly used to represent the second new Moon of a month. This rarely happens outside of leap years, as lunar cycles largely take 29 days to complete. But every 32 months or so, there are two full Moons in a month, with the first being known as a blue Moon.