In what year did leap December appear in the history of China?

Leap December is leap December, which is 208, 360, 379, 436, 629, 648, 667, 724, 906, 982, 1058,153, 65438.

1430, 15 17, 1525, 1536, 1574, 3358, 3472, 3806, 3988, 4756556

Extended data:

The ancients found that even if three years and one month were added, the problem of coincidence between months and climate could not be completely solved. Because the three years of the lunar calendar are about 33 days shorter than the year of the tropic of cancer, and the leap month is 29 or 30 days, which is still about 3 days shorter.

Therefore, the ancient working people adopted the method of 19 leap for 7 years. In this way, the days of 19 lunar year and 19 solar year are basically equal. Because 19 lunar year is 228 months, if you add 7 leap months, it is exactly equal to 235 months of 19 tropic year. In this way, the lunar calendar and the solar calendar will be harmonized, and the month will be roughly consistent with climate change.

As for which month the lunar leap month is, it has something to do with the 24 solar terms. 24 solar terms * * * has 24 numbers, and the corresponding odd numbers are called "solar terms", such as beginning of spring, Jingzhe, Qingming and Changxia.

Every corresponding even number is called "Zhong Qi", such as Rain, Minute, Grain Rain and Xiaoman. There is 12 gas every year, and 12 gas is used as the symbol of1February in the lunar calendar. For example, the month of rain is the first month, the month of Xiaoman is April, and the month of first frost is September.