20 18 lunar year number?

AD 20 18, Lunar Year of the Dog 47 15, excluding leap months, from the first day of the first month to the thirtieth day of the twelfth month (New Year's Eve), a total of 354 days.

1898 is a year of the lunar calendar, and 60 years is a cycle, which is what people often say.

The so-called lunar calendar years are literally equivalent to trunks and branches. In ancient China, the sky was dominant and the earth was subordinate. The connection between the sky and the trunk is called heavenly stems, and the connection between the ground and branches is called earthly branches. Together, it is called heavenly stems and earthly branches, or "dry branch" for short. There are ten heavenly stems, namely A, B, C, D, E, Ji, G, Xin, Ren and Gui, and twelve earthly branches, namely Zi, Ugly, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu and Hai.

The sky turns six times and the earth turns five times, just forming a cycle, so the ancients matched them in the order of Jiazi, Ebo and Bingyin, and there were 60 pairs of Jiazi to Guihai, just a cycle of 60 years.

Expand the advantages of the lunar calendar:

1, the lunar calendar is a fixed calendar with the characteristics of astronomical calendar, which can well correspond to various astronomical phenomena, such as its solar terms strictly correspond to the height of the sun, calendar days strictly correspond to the moon phase, the frequency of the non-appearance and appearance of leap months corresponds to the perihelion and distant day of the earth, and other astronomical phenomena, such as sunrise, sunset, five-star orientation, solar eclipse and tides. Even calendar months roughly correspond to the sun.

2. The lunar calendar has only 29 days and 30 days, and it is stipulated by a fixed date. The human factor is minimal and it is not easy to change it at will;

3. The beginning of a year has a strong astronomical significance, and it has the astronomical significance of the year of the sun and the moon;

4. The lunar calendar is the best embodiment of the harmony between man and nature and Yin and Yang in China traditional culture.

5. The chronology of the main branches and the chronology of the zodiac are recycled; Because it contains solar terms, it is very beneficial to the division of the four seasons, and because it contains the moon phase, it also reflects the influence of tides, eclipses and other celestial phenomena and the moon on the climate.

References:

Lunar Chronology-Baidu Encyclopedia