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Notes:
The cyclic leap year system predicts the vernal equinox to great precision, but is extraordinarily complex. At the first level (A), there are two cycles. In the five-year cycle, the first, third, and fifth years are leap years. In the seven-year cycle, the first, third, fifth, and seventh years are leap years:
Cycle A5: 669, 668, 669, 668, 669
Cycle A7: 669, 668, 669, 668, 669, 668, 669
At the second level (B), there are five cycles, each consisting of four A cycles:
Cycle B1: A7, A5, A5, A5 = 22 years
Cycle B2: A5, A7, A5, A5 = 22 years
Cycle B3: A5, A5, A7, A5 = 22 years
Cycle B4: A5, A5, A5, A7 = 22 years
Cycle B5: A7, A5, A5, A7 = 24 years
The third level cycle (C) is 310 years long, consisting of the following sequence of B cycles:
B5, B4, B4, B3, B4, B3,B3, B2, B3, B2, B2, B2, B2, B1
Unfortunately, this C cycle does not repeat, so a new cycle would need to be devised after 310 years.
This is one of several 22-month calendars.
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A
Mars Calendar Richard Weidner |
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Mars
Calendar Opus 7 Richard Weidner |
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A
Mars Clock Richard Weidner |
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Calendar |
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Martian Time |
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Martian Time Survey 2.2 |