In fact, the calendar uses heavenly stems and earthly branches to represent the year, month, day and time. The ten-day work includes A, B, C, D, E, G, Xin, Ren and Gui. Twelve earthly branches: Zi, Ugly, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu and Hai.
This calendar represents time, and heavenly stems and earthly branches has one word each. In order, namely from Jiazi, Ebo, etc. To Guihai, it happens to be a cycle of 60 groups. Year, month, day and hour are called "four pillars", and each pillar is represented by "a day's work and a place's support", so it is called "eight characters".
Although it is composed of Chinese characters, this Chinese character is actually just a symbol here, not a general language or sentence. It's just an elephant. The eight characters are essentially the same as the hexagrams in Zhouyi, except that they use Chinese characters instead of Yin and Yang symbols to form hexagrams.
Baziguan
Jia Zi, Yi Chou, 60-year cycle. For example, 20 16 this year is the year of Bing Shen, then 20 15 last year is the year of B, and 20 17 next year is the year of Ding You, and so on. From June 1 to June 12 (Lunar New Year), the ground branches are: silver moon, Uzuki, Chen Yue, Mitsuki, Noon, Yue Wei, Shen Yue, Youyue, Yuan Yue, Haiyue, Ziyue and Ugly Moon.
The monthly dryness can be calculated from the annual dryness. For example, 20 16 is the year of Bing Shen, and the annual stem is C. Then the monthly stem on May 9, 20 16 (the third day of the fourth lunar month) is "decyl", that is, the fourth month. Since February of the third year of Lu Yingong (722 BC), China's calendar has never stopped, which is the only longest calendar known to human society.