Contrary to what the name suggests, the moon will not literally turn blue. Yet it is a phenomenon to look forward to, because a “blue moon” is the second full moon in one calendar month. That doesn’t happen often, but it will soon be. And then on Halloween.
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The first full moon will be on October 1, the next will be on October 31. That second full moon in the same month is then called the “blue moon”. A phenomenon so rare that the English even took an expression from it: “Once in a blue moon”, Which means as much as almost never.
Because the phenomenon of the blue moon only occurs once every two to three years. In addition, this blue moon will be visible around the world for the first time in thirty years, so people in all time zones will see the blue moon on the same night. The fact that he can be seen this year on October 31 – on Halloween – makes it even more special. We will not get the next blue moon on Halloween until 2039.
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