It is sometimes mistakenly called a "blue moon." There is no "official" name for the second full moon in a month. The full moon is an astronomical phenomenon that happens at a specific moment. Specifying that moment (as, for example, "7:23 PM on November 21st" depends entirely on the usage of the Roman calendar and the time zone of the observer. So the "second full moon in the month" might not even occur for a different observer. The full moons must be approximately 28 days apart, so this means that each would necessarily fall near the beginning and end of a month, increasing the likelihood that each would occur in a different month.
The history of the term "blue moon" is very interesting, and to read it just follow the related link below. In summary, a "blue moon" is the 4th full moon in an official "season". Seasons usually have only three full moons, and in folklore each moon has a name which helps farmers know when to do certain things. An extra moon throws this off, and so was named "the blue moon" leaving the other full moons to carry their proper names.
The suggestion that the second full moon in a month is called a "blue moon" comes from an error made in "Sky and Telescope" magazine in 1946, and repeated several times in print and on radio until it was accepted as the truth.
See the link below for the whole story.
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Blue Moon
The second full moon in a month is called a "blue moon."
Blue Moon
sunny
Many have misinterpreted the definition of the blue moon to mean the second full moon. A blue moon refers to the third full moon.
Yes, the second full moon commonly called a 'blue moon', hence the expression of something happening in a blue moon (seldom occurring)
The second full moon in a month is called a "blue moon."
A second full moon in a month is a blue moon.
A blue moon.
Blue Moon
Its called blue moon.
The second full moon of any month is called a 'blue moon'. It is a rare occurrence. The saying 'once in a blue moon' means that something does not happen very often.
The common name for the second full moon in a calendar month is a "blue moon". Pop quiz; what month can NEVER have a blue moon? Answer: February.
That's a "Blue Moon" . . . the second Full Moon in the same CALENDAR month.The cycle of moon-phases is 29 days, so there has to be a full moon on the 1st or 2nd of the month,in order to have another one before the end of the month.December 2009 will have Full Moons on the 2nd and the 31st. That will be the first time in a little over 3 years.
A blue moon.
sunny
The month the full moon the called harvest moon is October.
Yes sometimes there are 2 full moons during one month. These do not happen very often and the second full moon is called a 'blue moon', hence the expression, "once in a blue moon".