Have you ever heard of the phase “Once in a blue moon?” Yeah…, the color of the moon on that night is not blue but there are actually two full moons in a particular month. And August 2012 is a month with two full moons.
The first full moon was on August 1st 2012 while the second full moon appeared on the night of August 31st 2012. Thus, there was a blue moon in the month of August 2012.
“Seven times in 19 years there were — and still are — 13 full moons in a year. This gives 11 months with one full moon each and one with two. This second in a month, so I interpret it, was called Blue Moon.”