The main lunisolar leap cycle in history is the Metonic cycle.
This page lists some notable alternatives.
Comparison table[]
| Lunar cycle | Intercalary months | Solar cycle | Leap days | Average year length | Average month length |
|---|---|---|---|---|---|
| Metonic (19 years) | 7 | Julian (4 years) | 1 | 365.25 | 29.530851 |
| 117 years | 43 | 351 years | 85 | 365.242165 | 29.532366 |
| 372 years | 137 | 62 years | 15 | 365.241935 | 29.530537 |
| 3720 years | 901 | 365.242204 | 29.530559 | ||
| 896 years | 330 | 128 years | 31 | 365.242188 | 29.530500 |
| 1404 years | 517 | 351 years | 85 | 365.242165 | 29.530665 |
| 2919 years | 1075 | 417 years | 101 | 365.242206 | 29.530565 |
| 3750 years | 1381 | 1875 years | 454 | 365.242133 | 29.530584 |
All items (5)