"ONCE IN A BLUE MOON" - The Brilliant Moon From Hur WV

(07/31/2015)

If anything unusual happens, people often say, "Once in a blue moon."

The Friday night, July 31 appearance of the month's second full moon will be the first such occurrence in the Americas since August 2012.

Every month has a full moon, but because the lunar cycle and the calendar year aren't perfectly synched, about every three years we wind up with two full moons in the same calendar month.

But the moon will most likely not appear blue at all.