What are the implications and traditions of autumnal equinox solar terms and traditional autumnal equinox solar terms?

1, the meaning of the autumnal equinox solar term: the autumnal equinox is the fourth solar term in autumn, and it is also the 16 solar term among the 24 solar terms. The autumnal equinox is when the sun reaches 180 degrees on September 23rd or 24th every year. The sun shines directly on the equator of the earth, and the day and night are equally divided, each with 12 hours. There is no extreme day and night in the world. After the autumnal equinox, the direct point of the sun continues to move southward, so the autumnal equinox is also called declination. After that, the temperature difference between day and night will gradually increase, and the range will be higher than 10℃.

2. Traditional customs: eating autumn vegetables, sticking bird's mouths, flying kites, sending autumn cows and offering sacrifices to the moon at the autumn equinox.