Which part of The Book of Songs describes local folk customs?

The Book of Songs is a collection of China's ancient poems and a classic of China's traditional culture.

[July]

It turns out that July is full of fire and August is full of reeds. Silkworm, moon, mulberry, axe fork. I'm afraid of mulberry if I want to cut far and wide. We shuttled back and forth in the eighth month. Xuan zai Huang, I, for the childe petticoats.

In July, Mars flows westward, and the gas of small sand strikes. In August, he harvested reeds with a sickle. Silkworm Moon (March) picked up an axe and cut off the tall and long branches. In July, the cuckoo tree sings, and in August, linen is busy, making it black and yellow. Mine is very clever, making clothes for my son.

The garden was built in September and the crops were harvested in 10. The day is in the grass and the night is in the rope. I was so anxious to hitch a ride in the house that I began to broadcast Baigu. Friends drink and say they killed the lamb. They sue and say they are arrogant and have no boundaries.

Play in September and enter the warehouse in 10. Cut the thatch during the day and rub the rope at night. Hurry to build a roof and plant crops in spring. Taste a bottle of wine and kill the sheep. Get on the court (ancient public place), raise the horn cup and wish "long life without borders" in unison!

The value of The Book of Songs is not only reflected in literature, but also one of the important historical materials reflecting the folk festivals and social classes at that time.