What is the autumn moon from the ancient poems about night parking near Fengqiao?

You can start from "on a frosty night, Jiang Feng sleeps on fire." See this sentence.

"Frost" only exists in autumn, and "Frost all over the sky" means late autumn; "Jiangfeng" refers to maple trees along the river, and it can also refer to maple leaves falling on the river. "Jiangfeng" is relative to "fishing fire", and it can also be understood that the colors of maple leaves and fishing fire are relative-both are red, so both fallen leaves and red leaves are just autumn phenomena.

Bottom line: "Frost" and "Maple" prove that this is an autumn.