Although the full
moon that you'll see on Aug. 31, 2012, will look like an ordinary full moon, it
will actually be a Blue Moon.
What is a Blue Moon?
The most common definition of a blue moon is the second full moon in a calendar
month. For a blue moon to occur the first of the full moons must appear at or
near the beginning of the month so that the second will fall within the same
month (the average span between two moons is 29.5 days). The full Moon on Aug.
31, 2012, will be this type of blue moon; it will be the second full moon in
one month.
How often does a
Blue Moon occur? Over the next 20 years there will be about 15 blue moons. No
blue moon of any kind will occur in the years 2014, and 2017. The more recent
phenomenon, where the blue moon is considered to be the second full moon in a
calendar month, last occurred on December 31, 2009. Two full moons in one month
may occur in any month out of the year except for February, which is shorter
than the lunar cycle.
The rare phenomenon
of two blue moons occurring in the same year happens approximately once every
19 years. 1999 was the last time a blue moon appeared twice, in January and
March. The months of the double blue moons are almost always January and March.
That is because the short month that falls in between them, February, is a key
ingredient in this once-every-19-year phenomenon. For January and March to each
have two full moons, it's necessary for February to have none at all. Since
February is usually 28 days long, and the average span between full moons is
29.5 days, if a full moon occurs at the end of January, it's possible for the
next full moon to skip February entirely and fall in the beginning of March.
"Blue
Moon" appears to have been an expression long before it developed its
calendar meaning. According to the Oxford English Dictionary, the first
reference to a blue moon comes from a proverb recorded in 1528:"If they
say the moon is blue, we must believe that it is true." In the 19th
century, the phrase until a blue moon developed, meaning "never." The
phrase, once in a blue moon today has come to mean "every now and
then" or "rarely."
We invite you to
visit our website (www.underoneumbrella.com) and view all of the variety of
styles and colors from which to choose from...including different shades
of...blue, or white, or gray (depending on the season, day of the month or year
we are in!).
"Blue moon
You saw me standing
alone
Without a dream in
my heart
Without a love of my
own" - Elvis Presley