heavenly stems and earthly branches formed the ancient calendar. Ten branches and twelve branches are matched in turn to form sixty basic units, and they cooperate with each other in a fixed order to form the era method of branches and branches. Judging from the Oracle Bone Inscriptions unearthed in Yin Ruins, heavenly stems and earthly branches was mainly used to record the day in ancient China, and it was also used to record the month, year and time.
one: ten days dry:
A (ji ǐ), B (yǐ), C (bǐng), D (d ǐ ng), E (w ǐ 9;), J (jǐ), G (g ǜ ng), Xin (. Among them, A, C, E, G, and N are yang-dried, while B, D, J, Xin, and Gui are yin-dried.
two: twelve earthly branches:
Zi (zǐ), chǒu (ch ǐ u), Yin (yín), Mao (m ǐ o), shēn (chén), Si (s ǐ), Wu (wǔ) and Wei (wèi). Among them, Zi, Yin, Chen, Wu, Shen and Xu are Yang branches, while Ugliness, Mao, Si, Wei, You and Hai are Yin branches.
three: twelve earthly branches correspond to the zodiac:
Zi-mouse, Ugly-ox, Yin-tiger, Mao-rabbit, Chen-dragon, Si-snake, Wu-horse, Wei-sheep, Shen-monkey, You-chicken, Xu-dog, Hai-.
Then the specific date has its own calculation method.
The heavenly stems are numbered as follows: 1 (A), 2 (B), 3 (C), 4 (D), 5 (E), 6 (F), 7 (G), 8 (Xin), 9 (nonyl) and 1 (N). 12 (Ugly)
Calculation of annual expenditure:
① Annual expenditure formula: annual expenditure = single digits of the year-3 (applicable to any year in AD, the single digits are less than 3, and the borrowing is 1)
② Annual expenditure formula: annual expenditure = (year +7)÷12 remainder (divisible by the remainder , that is, the remainder 12= That is, 19-1999)
(two digits at the end of the year +3)-12*N= annual expenditure (applicable to the 21st century, that is, 2-1999)
Calculation of monthly expenditure:
① Monthly expenditure formula: monthly expenditure = annual expenditure x2+ monthly expenditure (and over 1, directly Because leap years are all in Shenzichen year, with 366 days and 365 days in normal years, the number of days is fixed, and the number of days in each month is also fixed, so as long as we know the trunk and branch of New Year's Day, we can calculate the number of days from New Year's Day, and subtract 6 times the number of days to calculate the trunk and branch of a certain day.
Extended information:
The working people in ancient times initially assigned representative words to the weather in one day. If the sun comes out in the morning and plants start to grow, this time is nicknamed "wood".
At noon, the sun is the strongest, and the air and the land are burning, so the time is nicknamed "fire, gold" and "fire and earth". It is driest at 5-7 pm, and the fruit is full of sugar. At this time, it is nicknamed "Gold". At 12 o'clock in the middle of the night, everything was calm, and it was nicknamed "water" at this time.
Beijing time, to be exact, refers to the local time in the area where the east longitude is 12 degrees. Since Beijing is about 117 degrees east longitude, 12:12 Beijing time is the standard local time in Beijing.
and different areas in the east or west should be calculated according to the degree of east longitude in the local area. The earth rotates once (36 degrees) from west to east, and it takes 24 hours, with 1 degree every 4 minutes (the distance between 1 degree is 4 minutes, and the principle of "adding east and subtracting west"). In other areas, it can be calculated according to this.
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