Rare Blue Moon To Light Halloween Sky
GET READY FOR A BLUE MOON THIS HALLOWEEN
(CNN) – Saturday will be a little more spooky than usual this year.
The Halloween sky will be lit by a blue moon; the second full moon in that month.
This will also be the first blue moon in the U.S. since March 2018.
Despite its name, a blue moon is not necessarily blue.
The phrase “once in a blue moon” usually means a rare occurrence that can either be lucky or unlucky.