What does the solstice of autumn mean?

The vernal equinox and the autumn solstice refer to two moments when the direct point of the sun is at the equator, that is, two days with roughly equal length of day and night. The spring equinox usually occurs on March 2 1 day every year, and the autumn equinox usually occurs on September 23 every year. These two moments are also the vernal equinox and autumnal equinox in the 24 solar terms.

Vernal equinox: the fourth of the 24 solar terms, March 20th or 21; Mid-spring, the length of day and night is equal.

Summer solstice: the tenth of the 24 solar terms, June 2 1 or 22; It means that the heat is coming, with the longest day and the shortest night.

Autumnal equinox: the sixteenth day of the twenty-four solar terms, September 23rd or 24th; It means that in the crisp autumn, day and night are equal.

Winter solstice: the 22nd solar term in 24 solar terms, which falls on 65438+February 20th or 22nd, 265438+; It means that winter is coming, with the shortest day and the longest night.