Traditional Culture Encyclopedia - The 24 Solar Terms - Judging vernal equinox and autumnal equinox according to the termination line
Judging vernal equinox and autumnal equinox according to the termination line
The end line according to the date (special dates, such as winter solstice, summer solstice, vernal equinox and autumn equinox. The remaining 36 1 day cannot be judged) Method: 1, the terminator line coincides with the meridian at the vernal equinox or autumnal equinox, and 2, the terminator line is tangent to the polar circle at summer solstice or winter solstice. The judgment of the season is: 1, the terminator line coincides with the meridian in spring and autumn, and 2. When the terminator line is tangent to the polar circle: (1) It is summer when there is an extreme day phenomenon in the arctic circle (north) or an extreme night phenomenon in the Antarctic circle (south), and (2) if there is an extreme night phenomenon in the arctic circle (north) or the Antarctic circle,
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