Wednesday, December 30, 2009

Once In A Blue Moon

The final day of 2009 will be special for many reasons.  It's a once in a Blue Moon occurrence--literally.  A blue moon occurs on average once in every 2 0r 3 years.  It is generally regarded as having two full moons in the same calendar month.  This December 2009 is that month. 


Even more interesting, the last time a blue moon occurred on New Year's Eve was 19 years ago in 1990.  The next time it is expected to occur on New Year's Eve is 2028.