Cold air struck at the opening of "March 9". Why do you feel colder after entering "March 9"?

For several days, we all know that it started in the winter of solstice, but we don't know much about it. Let's take a look today!

As the saying goes, "It's hot in dog days, but cold in three or nine days", so it should be colder than four or nine days. But China is so big, the temperature in every place is definitely different. Generally speaking, three or nine days in the north is colder than four or nine days in the south, and four or nine days is colder than three or nine days, so there is no certain rule about which is colder.

What is three days or nine days?

"Sanjiu" refers to the first three "nine days" from winter to the future.

The specific algorithm is to calculate "nine" every "nine days" from winter to Sunday. The first nine days were called "Yijiu", the last nine days were called "Erjiu" and the last nine days were called "Sanjiu".

Count nine cold days, March nine cold. "The coldest period of the year is Sanjiu. Until the 81st day of "999", the weather will be warm when "nine peach blossoms bloom".

Jiujiu ballad

1929 Don't make a move.

3949 ice walk

Look at the willows by the river.

Seven or nine rivers open and eight or nine geese come.

99 plus 19, plowing cattle everywhere.

So when did March 9, 2020 -202 1 begin?

2020-2021March 9 timetable

The first nine days: 65438+February 2, 20201-65438+February 29, 2020.

The second nine days: 65438+February 30, 2020-202165438+1October 7.

The third nine days: 202 1 year 65438+1October 8th -202 1 year 65438+1October 6th.

After entering March 9th, there is another problem worthy of our attention, that is, March 9th just happened to catch up with the peak in Spring Festival travel rush. Today, Spring Festival travel rush has officially kicked off. The weather during this period directly affects everyone's going home. After reading the weather forecast, there will be large-scale rainfall and snowfall in many places, and even there will be heavy snow in some places, especially in the northern region. The overall temperature is relatively low and the southern cities are relatively warm, so this year's.