1999 When did the cold weather start?

1999 The cold weather started from the winter solstice. Jiujiu, also known as Jiujiu, is a folk solar term in winter in China, which reflects the general situation of temperature changes in winter in China. September 51 begins on the day of the winter solstice and ends with the fright, that is, the Gregorian calendar 12 is about February 22 to March of the following year 12.

There is a folk custom of counting nine. Every nine days is 19, counting from 19 to 99. The calculation method is 19 every nine days from the winter solstice, 19 in the first nine days, 29 in the last nine days, and so on, until 99, that is, by the ninth nine days, the number reaches 998 1 day.