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| Months | |||
Solar cycle | Phase | Year | March (Equinox) | June (Solstice) | September (Equinox) | December (Solstice) |
C22 | Min | 1985 | 9, 13, 21, 22, 25 | 3, 14, 16, 18, 19 | 2, 3, 4, 5, 29 | 8, 9, 21, 23, 29 |
Max | 1990 | 4, 10, 16, 17, 31 | 16, 17, 20, 21, 30 | 2, 3, 27, 29, 30 | 10, 11, 19, 21, 29 |