Beginning of winter's Records in Ancient Books and Records

One of the 24 solar terms. Gregorian calendar 1 1 July 7 or 8, lunar calendar1early October. I thought the beginning of winter.

Where's Yi? "Time Training": "On the day of beginning of winter, water began to freeze; On the fifth day, the ground began to freeze; On the fifth day, the pheasant entered the water as a dragonfly. "

Book of rites? Month Order: "On the day of beginning of winter (the month of Meng Dong), the son of heaven led three princes, nine ministers, governors and doctors to welcome the winter in the northern suburbs."

-Chinese dictionary