Bai Lu, how bright the moonlight is at home from tonight! Is it a poem about the Mid-Autumn Festival?

No, this poem describes the Millennium scene during the solar term.

The whole poem is:

Think of my brothers on a moonlit night.

Tang Dynasty: Du Fu

The drums of the defenders cut off people's communication, and a lonely goose was singing in autumn in the frontier. (Bian Zuo: Autumn Destiny)

The dew turns to frost tonight, and the moonlight at home is bright!

Brothers are scattered, and no one can ask about life and death.

Letters sent to Luoyang city are often not delivered, and wars often do not stop.

translate

Garrison the drums upstairs to break pedestrians, and the lonely geese sing in autumn night.

Starting from tonight, I entered the Millennium solar term, and the moon in my hometown is still the brightest.

Although there are brothers, they are all separated, and it is impossible to find out about them.

Letters sent to Luoyang city are often not delivered, and frequent wars have never stopped.