(special thanks to Wikipedia for providing most of the info for this post)
Really though. Today is a Blue Moon. Enjoy it...if you are in the Western Hemisphere. Moody, Pandabonium and a couple billion of their closest friends will need to wait until June 30th for their Blue Moon.
A Blue Moon is the second full moon in one month. It doesn't happen very often and won't happen again for a little over 2 years.
However, it seems as though the term Blue Moon has a history that we are supposed to worry about now.
According to Wikipedia,
The older meaning of blue moon to name an extra full moon, as was used in the Maine Farmer's Almanac...
In 1948, Sky and Telescope reported this as meaning two full moons in one calendar month. This was reinforced by the radio program Star Date and this is what is now the current usage and meaning of the term.
Sky and Telescope recently posted a funny retraction here;
The trendy definition of "blue Moon" as the second full Moon in a month is a mistake.
Trendy, eh? And WHO made it trendy, eh? Well, it was Sky and Telescope. Nonetheless, we find the original definition is most likely (from Sky and Telescope's SkyTonight.com)
At last we have the "Maine rule" for Blue Moons: Seasonal Moon names are assigned near the spring equinox in accordance with the ecclesiastical rules for determining the dates of Easter and Lent. The beginnings of summer, fall, and winter are determined by the dynamical mean Sun. When a season contains four full Moons, the third is called a Blue Moon.
Wow, what an exciting definition! The 3rd full moon in a 4 full moon quarter. Given that the moon is not guaranteed to be Blue or in any way tied to ancient religions that we can readily determine, I am going to stick with TODAY as a Blue Moon. (or June 30 for my few billion pals on the other side of the planet)
So Happy Blue Moon to you.