The Transformation of Time and heavenly stems and earthly branches

Gregorian calendar conversion time is very simple, just bring the number at the end of the year into the sky, such as 20 18, the last number is 8, and the corresponding number in the sky is e.

It is also very simple to convert the solar calendar into time. Divide the year by 12, and the remainder can be brought into the earthly branch. For example, if you divide one year by 18, the remainder is 2, and the equivalent value in the earthly branch is 10,000. So 20 18 is the year of 1898!

Historical year

Now the year of the lunar calendar still uses dry branches. When we know that the year of one of the branches is AD, we can calculate the years of other branches. For example, we can calculate that the Xinyou coup, the Sino-Japanese War of 1894-1895 and the Revolution of 1911 occurred in 186 1, 1894, 19 1 respectively.

Extended data

history

China used various time periods in ancient times. During the Spring and Autumn Period and the Warring States Period, the ten-hour system was adopted, that is, day and night were divided into five periods: morning, evening, noon and evening. There are periods A, B, C, D and E in the evening, *** 10. The division of this time period is unequal, because the length of day and night varies throughout the year.

After Qin and Han Dynasties, the ten-hour system was abolished. As for the time when cadres and party branches were created and used, there is no way to verify them. However, it evolved on the basis of the ancient twelve-day system.

In ancient times, a day and night was divided into twelve hours, which were represented by twelve earthly branches, such as zi, ugly, yin and Mao. At midnight. The common view is that the Twelfth Birthday was probably founded before the 28th night. It was not until the Tang Dynasty that twelve branches matched ten branches that it became the era of branches.

Baidu Encyclopedia-heavenly stems and earthly branches