The harvest moon is the full moon that occurs closest to the autumnal equinox.

丰收月是最接近秋分的满月。

Yesterday was officially the autumnal equinox in the northern hemisphere, and the vernal or Spring equinox in the southern one.

昨天是北半球的秋分，南半球的春分。

Happening on September 22nd this year, the autumnal equinox marks the first day of fall for those living above the equator.

今年的9月22日就是秋分了，标志着赤道以北地区进入秋季。

In September there is what we call the " autumnal equinox."

九月是我们所说的“秋分” 。

The Chinese farmers' harvest festival was initiated in 2018. It coincides with the autumnal equinox and usually falls during the country's agricultural harvest season.

中国农民丰收节于 2018 年设立，于秋分之日开启，这一节气通常是我国农业收获的季节。

At the time, the autumnal equinox was in Libra, so the name was fitting for a time where night and day were equal in length.

当时，秋分点在天秤座，所以这个名字很适合昼夜等长的时间。