Autumn is not the autumnal equinox, autumn and the autumnal equinox are two different festivals, they are different in time, meaning, climate, the three candidates, the following details:

1, time is different

Liqiu: Liqiu Festival: Liqiu Festival, in the annual Gregorian calendar, on August 7 or August 8 intersection of the festival, the Liqiu Festival when the sun will be rotating to the position of 135° of the yellow longitude, the Liqiu Festival marks the official establishment of autumn, to the Liqiu Festival, you can start to call it autumn.

Autumn Equinox: The Autumn Equinox, which intersects the festival on September 22-24 on the Gregorian calendar each year. Autumn Equinox is the opposite of Vernal Equinox, both of which equalize the seasons. The position of the sun is 0° at the time of Vernal Equinox, and 180° at the time of Autumn Equinox, during which the sun will shine directly on the equator, and the day and night are equal in most parts of the globe.

2, the sun's position is different

Autumn, the sun reaches 135 ° longitude. Autumn equinox, the sun reaches 180 degrees of yellow longitude.

3. Different meanings

The autumnal equinox, meaning that the summer heat goes away and the coolness comes, means the beginning of autumn. Autumnal equinox, means that the day and night time is equal, the climate from hot to cool.