| Answer | Crossword Clue |
|---|---|
| EON | Period akin to a blue moon. |
| lunation | the period of time from one new moon to the next (about 291/2 days); a lunar month |
| AGES | A blue moon, so to speak |
| LUNARDAY | New-moon-to-new-moon period |
| interlunar | pertaining to the period between the old and new moon also INTERLUNARY |
| interlunary | pertaining to the period between the old and new moon also INTERLUNAR |
