The world will witness a Blue Moon on October 31.
The term is used to indicate a second full moon in a single calendar month.
The first Blue Moon of the month occurred on October 1.
The blue in Blue Moon has nothing to do with colour.
The phenomenon happens every 30 months, except for the month of February as it has only 28 days.
Blue Moon is also referred to as Halloween moon or Hunter’s moon.
Reportedly, since the end of World War II, this will be the first time the Halloween moon will be visible to the entire world.
The next Blue Moon is expected to occur on August 22, 2021.