A blue moon occurs when two full moons appear in a single month
May 21, 2026
05:51 pm
What's the storyThe term "once in a blue moon" refers to something that is extremely rare. However, the truth is that 'blue moons' are not as uncommon as the saying implies.
A blue moon occurs when two full moons appear in a single month, which happens about every two to three years.











