When did the lunar calendar begin in China?

The calendar of the lunar calendar in China began in the Xia Dynasty. The ancients calculated and determined the calendar of one year according to the moon's profit and loss cycle. There are twelve months in a year, and the first day of the first month is the beginning of the new year. This is our Spring Festival today, which used to be called Chinese New Year.

The Shang dynasty changed slightly, starting from the first day of December. The Zhou Dynasty advanced the start of the New Year by one month, that is, the first day of 1 1 month. Qin Shihuang took the first day of October as the beginning of the New Year another month earlier. It was not until the first year of Emperor Wu of the Han Dynasty (BC 104) that the first day of the first month was regarded as the first year of the Xia Dynasty, and this day was designated as New Year's Day, which has been used in China ever since.

At the beginning of the Republic of China, the Gregorian calendar was adopted, and the date of 1 every year was designated as New Year's Day. As a result, the traditional first day of the first lunar month in China was renamed "Spring Festival".

Because our traditional calendar is based on agricultural time, it is called "lunar calendar". Because the lunar calendar was born in the Xia Dynasty, it is also called the "Summer Calendar". Compared with Gregorian calendar or Gregorian calendar, we also call ourselves the "lunar calendar" based on the traditional calendar. heavenly stems and earthly branches has three names combined with calendar years.

The first month of the lunar calendar every year, we call it "the first month". The pronunciation of the word "positive" should be "correct" positive. But we all interpret it as a sign of the "Long March". Why? The reason stems from the Qin Dynasty.

Qin Shihuang's name is Li Zheng, and the pronunciation of "Zheng" and "Zheng" is the same. Because the emperor is the first person in the world, his name can't be called, which is taboo. What about his son, Qin Ershi Hu Hai? After the death of Qin Shihuang, he ordered everyone in the world to correct the pronunciation of the moon to "close the moon".

Before the Gregorian calendar was adopted in China, the lunar calendar was always used. The lunar calendar in China is a kind of yin-yang calendar created by combining the solar terms formed by the sun shining on the earth with the changes of the moon, so it is very scientific. Average one year 12 months, 30 days in the big month and 29 days in the small month. Until now, people still call the big moon "the greatest achievement" and the small moon "the smallest achievement".

Add it up, a year is 354 days or 355 days. This is the same as the lunar method. Because every year is less than the solar year-return 1 1 day, that is, 365 days, 5 hours, 48 minutes and 46 seconds. If this goes on forever, the time will be poor, which will affect the calendar year and agricultural time.

Therefore, smart people in China set seven leap months every 19, so a year with leap months is 383 or 384 days, which is the same as a year without leap months, and it is still 365 or 366 days a year.

In order to facilitate calculation and memory, China people have created ten heavenly stems and twelve earthly branches to match each other, with a cycle of 60 years and never stopping. Therefore, there is no such thing as "BC" or "after AD".