When did you start counting to nine?

The number nine begins at the end of winter in 65438+February of the Gregorian calendar and ends on Everyone's Day.

Jiujiu, also known as Winter Jiujiu, is a folk solar term in China.

Astronomical experts say that the Ninth Five-Year Plan is a more applicable solar term in northern China, especially in the middle and lower reaches of the Yellow River. From the day you meet me on the winter solstice, you will enter the "number nine", commonly known as "cross nine" From then on, every nine days is a unit, which is called "Nine". After nine "nines", it happens to be 8 1 day, which means "nine out". At that time, bloom was warm in spring.

Climatic characteristics of extended data in winter solstice;

1, the solstice of winter marks the arrival of cold winter. During the winter solstice, the average temperature in the northwest plateau is generally below 0℃, while it is only about 6℃ to 8℃ in the south.

2. From winter to the sun, the position where the sun shines directly on the ground reaches the southernmost point of the year, and the sun almost shines directly on the tropic of Capricorn (also known as the winter solstice daily line), and the sun is most biased towards the northern hemisphere; Therefore, in all parts of the northern hemisphere, the winter solstice is the shortest day in a year, and the farther north, the shorter the day.

In the northern Arctic Circle, the sun is below the horizon all day, which is the widest day of the year in the northern hemisphere.

4. In winter, the earth is located near the perihelion, and its running speed is slightly faster, resulting in that the time of direct sunlight in the southern hemisphere is about 8 days shorter than that in the northern hemisphere in a year, so the winter in the northern hemisphere is slightly shorter than that in summer.

Baidu encyclopedia-ninth place

Baidu encyclopedia-winter solstice