What is the coldest day in winter?

March 9 and April 9 are the coldest seasons in winter.

The ninth ballad in the north:

Not in 1929.

Three, nine, four, nine, walking on the ice.

Look at the willows by the river.

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

Ninety-nine plus nineteen plowed cows everywhere.

So Sanjiu and Jiu Si are the coldest.

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.

Extended data:

In fact, winter solstice is "cathode day", with short days and long nights, which should be the coldest time of the year. In fact, this is the beginning of cold. As the saying goes, "Cold is on March 9th", and in some places, "On March 9th, April 9th, dogs and cats were frozen to death" exists in the "Jiujiu Song". March 9 and April 9 are often the beginning of the twelfth lunar month, so there are sayings of "freezing to death at the door of the twelfth lunar month" and "pulling Bala up and going out to freeze".

Baidu Encyclopedia-Count Nine