Famous Sayings: #30 — ‘Once in a Blue Moon’

October 2, 2016

This only happens once in a blue moon.

The first time I heard the phrase “Once in a blue moon,” I was a bit confused. But I think I still kind grasped the meaning.

Now, By all accounts, “once in a blue moon” refers to a rare occurrence. But are “blue moons” rare and why do we use that term?

Advertisement