Check the time of the autumnal equinox in 2019! What does the north and south mean during the autumnal equinox?

Check the time of the autumnal equinox in 2019!

The autumnal equinox in 2019 is:
August 25, 2019 (Lunar calendar)
September 23, 2019, Monday Libra (Gregorian calendar)
- Monday, September 23, 2019 15:49:25, 15:49:25

——Meaning of Autumnal Equinox:
1: Day and night are equal in length.
——The sun reaches 180 degrees of ecliptic longitude on this day and shines directly on the earth's equator. Therefore, in most parts of the world, the 24 hours of day and night are equally divided, 12 hours each. After the autumnal equinox, the sun's direct point begins to enter the southern hemisphere from the equator, and the days in the northern hemisphere begin to become shorter and the nights longer, with the daytime starting to be shorter than the night within a day. The area near the North Pole is also about to usher in six consecutive months of long nights and six consecutive months of everlasting starry skies in the year.
2: The climate changes from hot to cool.
——According to the ancient Chinese method of dividing seasons with the beginning of spring, summer, autumn and winter, the autumnal equinox is located in the middle of the 90 days of autumn, dividing the autumn season equally.

What does north and south mean during the autumnal equinox?