A Soli-Lunar calendar by John Savard
| Month | Days in ordinary or long year | Days in leap year | |
|---|---|---|---|
| 01 | 30 | 30 | |
| 02 | 29 | 29 | |
| 03 | 30 | 30 | |
| 04 | 29 | 29 | |
| 05 | 30 | 30 | |
| 06 | 29 | 29 | |
| 07 | 30 | 30 | |
| 08 | 29 | 29 | |
| 09 | 30 | 30 | |
| 10 | 29 | 29 | |
| 11 | 30 | 30 | |
| 12 | 29 | 30 | |
| Leap | — | 30 | — |
| Sum | 354 | 384 | 355 |
The 30-day leap month can occur after any month. The leap rules are algorithmic and try to match astronomic observation rules.