| 2/29 |
| Feb. 29 |
| February 29 |
| 29 February |
| February 29th |
| Calendar rarity |
| Intercalary event |
| 16.4% into some years |
| Bissextile occurrence |
| Quadrennial occurrence |
| Calendrical correction |
| The 29th, every so often |
| March preceder, periodically |
| Sixtieth day of the year, periodically |
| Traditionally, when women were allowed to propose marriage |
| Quadrennial occasion celebrated by this puzzle's theme entries |
| 2/29/16, e.g. ... or a hint to the circled squares in this puzzle |