Sentences with Once In A Blue Moon

Once in a blue moon, the reclusive author would emerge from seclusion to attend literary events.

Astronomers eagerly await the rare celestial events that happen only once in a blue moon.

The old sailor recounted tales of encountering mystical sea creatures once in a blue moon during his voyages.

The archaeologists uncovered an ancient artifact buried deep within the ruins, a discovery that occurs once in a blue moon.