|Taken about 0530 31Aug2012|
A blue moon can refer to either the third full moon in a season with four full moons, or the second full moon in a month.[
Two full moons in one month:[
- 2009: December 2, December 31 (partial lunar eclipse visible in some parts of the world), only in time zones west of UTC+05.
- 2010: January 1 (partial lunar eclipse), January 30, only in time zones east of UTC+04:30.
- 2010: March 1, March 30, only in time zones east of UTC+07.
- 2012: August 2, August 31, only in time zones west of UTC+08.
- 2015: July 2, July 31
I'm not sure I ever knew what a Blue Moon was until I watched a "Pretender" TV episode a few years ago. They used the 2 full moons in a month definition.
So this is the day to do all those things that you only do once in a Blue Moon! Plus either now or wait funtil 2015.
I found an intersting article on the origin at http://www.skyandtelescope.com/observing/objects/moon/3305141.html?page=1&c=y.