Why do we refer something of rare or that does not happen frequently as "once in

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  1. nnms profile image78
    nnmsposted 5 years ago

    Why do we refer something of rare or that does not happen frequently as "once in a blue moon" ?

  2. Just Ask Susan profile image89
    Just Ask Susanposted 5 years ago

    Because a "Blue Moon" is a rare event. I think a blue moon happens every 2-3 years.

  3. profile image0
    Ben Blackwellposted 5 years ago

    A "blue moon" is when the cycle of the moon reaches the full moon phase twice in a single month, such as August, rather than in 4 weeks or 30 days.  They are very uncommon.  That is why.

  4. JPB0756 profile image60
    JPB0756posted 5 years ago

    A "Blue Moon"
    " is the second of two full moons in one monthly lunar cycle.  About 1-3 occur each calendar year.

  5. esatchel profile image90
    esatchelposted 4 years ago

    Because Blue Moons are very rare events - the original definition is the THIRD full moon of four in a season. A season will have three months and generally, three full moons. Rarely, there will be a fourth, and in that case, the 3rd is called the blue moon.

    Now, why the 4th isn't called the Blue Moon is beyond me!

    The last Blue Moon was in August 2013. The next will be in 2016.

    If you go by the more current definition, that the second full moon in a month is a Blue Moon, then that will happen in 2015. This is less rare than the original definition.

 
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