Which solar term equals day and night? What solar terms are equal to day and night?

1 The solar terms equal to day and night are the vernal equinox and the autumnal equinox.

The vernal equ

Which solar term equals day and night? What solar terms are equal to day and night?

1 The solar terms equal to day and night are the vernal equinox and the autumnal equinox.

The vernal equinox, one of the 24 solar terms, is the fourth solar term in spring. The vernal equinox is an important solar term, which is of great significance in astronomy: the northern and southern hemispheres divide the day and night equally.

3, the meaning of the vernal equinox, one refers to the day and night equally divided, each 12 hours; Second, the vernal equinox is in the middle of spring (from beginning of spring to Changchun), and the spring is equally divided. The autumnal equinox is the sixteenth of the twenty-four solar terms, and the time is generally from September 22nd to September 24th in the Gregorian calendar every year. After the autumnal equinox, the direct point of the sun continued to move from the equator to the southern hemisphere, and the days in the northern hemisphere began to shorten and the nights became longer, that is, the days in a day began to be shorter than the nights; The southern hemisphere is the opposite. Therefore, the autumnal equinox is also called the landing point. At the North Pole and South Pole, on the day of the autumn equinox, the sun is on the horizon all day. After that, as the direct point of the sun continued to move southward, a six-month polar night began near the North Pole, which gradually expanded and then narrowed. A six-month polar day began near the South Pole, which gradually expanded and then narrowed.