| years per cycle | leap days per cycle | leap months per cycle | mean days per year | Julian exception rule | leap weeks per cycle | name / inventor |
|---|---|---|---|---|---|---|
| 4 | 1 | 365.25 | 365 + ¼ | N/A | Julian | |
| 19 | 7 | 365. | N/A | N/A | ||
| 28 | 365. | 365 + ¼ (leap week) | 4 | solar | ||
| 33 | 8 | 365.(24) | N/A | N/A | Dee, Khayyám | |
| 60 | 365. | 365 + 1/4 | N/A | sexagesimal | ||
| 62 | 15 | 365.24193548… | N/A | 11 | Sentinel | |
| 128 | 31 | 365.2421875 | 365 + ¼ – 1/128 | N/A | von Mädler | |
| 132 | 32 | 365.(24) | 365 + ¼ – 1/132 | N/A | ||
| 293 | 71 | 365.2423208… | N/A | 52 | ||
| 334 | 81 | 123 | 365.24251497… | N/A | N/A | |
| 353 | 130 | 365. | N/A | N/A | ||
| 372 | 137 | 365. | 365 + 1/4 | N/A | ||
| 391 | 144 | 365. | N/A | N/A | ||
| 400 | 97 | 365.2425 | 365 + ¼ – 1/100 + 1/400 = 365 + ¼ – 3/400 |
71 | Gregorian | |
| 450 | 109 | 365.24(2) | N/A | N/A | Half orthodox | |
| 640 | 365. | 365 + 1/4 | N/A | |||
| 656 | 159 | 365.2423780… | 365 + ¼ – 5/656 ? | N/A | ||
| 800 | 365. | 365 + 1/4 | ||||
| 900 | 365. | 365 + 1/4 | N/A | orthodox (revised Julian) | ||
| 1689 | 622 | 365. | N/A | N/A | Goddess Lunar | |
| 2800 | 365. | 365 + 1/4 | ||||
| 3200 | 365. | 365 + 1/4 | ||||
| 6300 | 365. | 365 + 1/4 | ||||
| 6840 | 2519 | 365. | 365 + 1/4 | N/A | Meyer-Palmen Solilunar Calendar |
Parentheses show repeating digits, three dots (…) show continued fractions.
All items (32)
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