The Truth About the ‘Blue Moon”
This week, there was a stellar event that only happens 'once in a blue moon.' I can't tell you how many people were waiting for the giant orb to turn blue. Okay, that's not what a 'blue moon' means.
We've all heard the phrase 'once in a blue moon.' Of course we use that phrase to describe something that rarely happens. Such is the case, literally, with a 'blue moon.'
The moon will not actually turn blue unless there are certain very rare atmospheric conditions; e.g. a volcanic eruption or extraordinarily large fires.
According to Wikipedia (yes, Wiki snobs, I know that it's not all that reliable as a source of information, but when it comes to things like definitions it's as good as any source out there)
A blue moon is an extra full moon that appears in a subdivision of a year, either the third of four full moons in a season or, recently, a second full moon in a month of the common calendar. Metaphorically, a "blue moon" is a rare event, as in the expression "Once in a blue moon."
So, enjoy the second full moon of the month...just don't sit there waiting for it to turn blue...you can look until you're blue in the face and it 'Ain't gonna happen.'