What autumn is there in early autumn and late autumn?

There are Mid-Autumn Festival, late autumn and so on. Their respective times are as follows:

Late autumn: the end of autumn, September and autumn, also known as late autumn (September also refers to the lunar calendar in September).

Late autumn: the end of autumn, generally referring to the ninth month of the lunar calendar.

Mid-Autumn Festival: August 15th of the lunar calendar, in the middle of August in autumn, so it is called "Mid-Autumn Festival".

Early autumn: The first month of autumn, also called Qiu Meng, is usually July in the lunar calendar.

Explained, it is difficult to distinguish between late autumn and late autumn. Generally speaking, late autumn is late autumn. Looking through some information, I think late autumn is late autumn.

Entering autumn means that rainfall and humidity tend to decrease or decrease, and everything in nature begins to mature from lush.