What does calendar nine nine mean?

Jiujiu on the calendar is the general name used by the ancient people in China to indicate the date from winter solstice or summer solstice to 8 1 day in the future. 8 1 day from winter to the future is called "Winter 99", and 8 1 day from summer to the future is called "Summer 99". This word is still very popular today, but it generally refers to winter 99 among the people.

"Winter Jiujiu" is counted from the non-healing day from winter to the sun (from winter to the future, the first non-healing day is called "cross-ninth", which means the beginning of cold), every nine days is called "Jiujiu", the first nine days are called "Jiujiu", the last nine days are called "Erjiu", and so on, and the "Jiujiu" is 8 1 day. As the saying goes, "summer solstice is three years old, and winter solstice is nine years old." . It is generally the coldest in April and September, which is the coldest period of the year; By the ninth five-year plan, the cold had disappeared and spring was blooming.

People usually put Xia Jiujiu into agricultural proverbs according to climate change: for example, "The summer solstice enters the ninth day, and the feather fan is in hand;" In 29 18, I took off my crown and put on a scarf; On March 27, I went out to sweat; Four, nine, thirty-six, open-air rolling seats; In 5945, autumn was like a tiger; 6954, enter the temple to enjoy the cool; 7963, touching the sheets at the bedside; 8972, looking for a quilt in the middle of the night; 998 1, open the cupboard to get cotton-padded clothes. "