'Once In A Blue Moon' Rare Blue Moon Is Happening!!!

7/31/2015 12:34 PM PDT

'Once In A Blue Moon' -- Rare Blue Moon Is Happening!!!

There’s a reason why the phrase “once in a blue moon” means rare … and Friday night’s lunar event proves it.

There will be a blue moon July 31… no, the orbiting space rock isn’t going to trip out and change colors, but it means it will be a second full moon within the same month.

Two full moons in one calendar month don’t happen very often … the last time it occurred was August 2012, and the next will be in January 2018.

So pull up a lawn chair, sit back, relax and grab a beer (preferably a Blue Moon) to enjoy the rare sighting.