When did Sanjiu begin?

Sanjiu begins from winter to the next day 19.

Three or nine days refers to the third "nine days" from winter to Sunday, that is, 19-27 days from winter to the future. China lunar calendar uses "99" to calculate seasons. The first day of the winter solstice is "19 days", and every 9 days is a "9". The first nine days are called "19", the last nine days are called "29" and so on. "99" 81days later, winter ends and spring enters, and the coldest period of the year is.

Three or nine days refers to the third cold day since the winter solstice, which is the coldest period in a year. The specific calculation method is: from winter to Sunday, every ninth day is counted as a ninth, the first nine days are called the ninth, the second nine days are called the ninth, and so on, and the coldest periods of the year are the third and fourth nine.

39-day phenomenon

The so-called "dog days are hot, March 9 is cold", and the coldest time of the year is from March 9 to April 9. "Nine peach blossoms bloom", the cold dissipates and the weather gets warmer. There is also a saying that "1999, 1999, there are cattle everywhere". After 1999, "the spring is deep and the sun is warm", and the spring ploughing season has arrived. Because of China's vast territory, the climate varies greatly from place to place, not all over the country.

The date of winter solstice in Gregorian calendar every year is 65438+February 2 1-23. Starting from the date of winter solstice, "99" is pushed forward by 8 1 day, that is, in late March of Gregorian calendar (around the vernal equinox), peach blossoms are in full bloom and spring blossoms are in full bloom, which only correspond to parts of southern China. Around the vernal equinox, many places in China are still gloomy and cold.

The above content is referenced from Baidu Encyclopedia-Sanjiutian