Despite its name, a “blue moon” doesn’t actually appear blue. A blue moon describes the second full moon in a single month.

On May 31, the lunar month culminates in a Blue Moon  — in this case, the second full moon in a calendar month.

"However, more distantly, the full moon is opposite Uranus, the planet of surprises, so shocking or chaotic events for better or worse are possible now, especially if people are impulsive, reckless or...