When was last Blue Moon
A blue moon is an additional full moon that appears in a subdivision of a year: either the third of four full moons in a season, or a second full moon in a month of the common calendar. According to modern folklore, a Blue Moon is the second full moon in a calendar month. Usually months have only one full moon, but occasionally a second one sneaks in. Full moons are separated by 29 days, while most months are 30 or 31 days long; so it is possible to fit two full moons in a single month. The last monthly Blue Moon happened on July 31, 2015. In recent decades, many people have begun using the name Blue Moon to describe the second full moon of a calendar month. There was a full moon on July 2, 2015. Blue moon of the December 2009 lunar eclipse. Blue moon seen through the Eiffel Tower. A blue moon is an additional full moon that appears in a subdivision of a year: either the third of four full moons in a season, or a second full moon in a month of the common calendar. Generally, the moon is only full about once every 30 days. This means the blue moon phenomenon can only take place if there is a full moon in the first few days of a month. The last full moon was on July 2. The phenomenon occurs once every two or three years. The last one took place on Aug. 31, 2012. The last monthly Blue Moon happened on July 31, 2015. In recent decades, many people have begun using the name Blue Moon to describe the second full moon of a calendar month. There was a full moon on July 2, 2015. There was another full moon on July 31. A blue moon will grace the night sky tonight (Aug. 31), giving skywatchers their last chance to observe this celestial phenomenon for nearly three years. The moon will wax to its full phase at 9:58 a.m. EDT (1358 GMT) today, bringing August's full moon count to two (the first one occurred Aug. 1). A blue moon will grace the night sky tonight (Aug. 31), giving skywatchers their last chance to observe this celestial phenomenon for nearly three years. The moon will wax to its full phase at 9:58 a.m. EDT (1358 GMT) today, bringing August's full moon count to two (the first one occurred Aug. 1). Sign up for our free daily newsletter today! The last monthly Blue Moon happened on July 31, 2015. In recent decades, many people have begun using the name Blue Moon to describe the second full moon of a calendar month. There was a full moon on July 2, 2015. No blue moon of any kind will occur in the years 2011, 2014, and 2017. The more recent phenomenon, where the blue moon is considered to be the second full moon in a calendar month, last occurred on August 31, 2012.
 July 2