| Answer | Crossword Clue |
|---|---|
| AGES | Period between blue moons |
| LUNARMONTH | Period between full moons |
| lunation | the period of time averaging 29 days, 12 hours, 44 minutes, and 2.8 seconds elapsing between two successive new moons |
| months | a measure of time corresponding nearly to the period of the moon's revolution and amounting to approximately 4 weeks or 30 days or 1/12 of a year |
| AEONS | Blue moons |
| RARE | Like blue moons |
| RARITIES | Blue moons and hen's teeth |
