| Metonic Intervals | Synodic Month (SM) | Synodic Month (SM) | Tropical Month (TM) | |
| I | 12 synodic months | ends 11 days before | 1 tropical year | 13 tropical months (returns) |
| II | LLY 25 synodic months | ends 8 days after | 2 tropical year | 27 tropical months (returns) |
| III | 37 synodic months | ends 3 days before | 3 tropical year | 40 tropical months (returns) |
| IV | 49 synodic months | ends 14 days before | 4 tropical year | 53 tropical months (returns) |
| V | LLY 62 synodic months | ends 5 days after | 5 tropical year | 67 tropical months (returns) |
| VI | 74 synodic months | ends 6 days before | 6 tropical year | 80 tropical months (returns) |
| VII | LLY 87 synodic months | ends 13 days after | 7 tropical year | 94 tropical months (returns) |
| VIII | 99 synodic months | ends 2 days after | 8 tropical year | 107 tropical months (returns) |
| III+VIII=XI | 37+99= | 3 days before + 2 days after = | 3+8= | 40+107= |
| XI | 136 synodic months | ends about 1+ day before | 11 tropical years | 147 tropical months (returns) |
| VIII+XI=XIX | 99+136= | 2 days after + 1+ days before | 8+11= | 107+147= |
| XIX | 235 synodic months | SAME TIME | 19 tropical years | 254 tropical months (returns) |