How to determine the date of Ugly Son?

Heavenly stems and earthly branches constitutes the ancient calendar. Ten branches and twelve branches are matched in turn to form sixty basic units, which cooperate with each other in a fixed order to form the epoch method of branches and branches. Judging from the Oracle Bone Inscriptions unearthed in Yin Ruins, in ancient China, the trunk and branch were mainly used to record the days, as well as the months, years and hours.

One: Ten days' work:

A (Ji ǐ), B (yǐ), C (bǐng), D(Dǐng), E (W ǐ), J (jǐ), G (gēng), Xin(xēn), Ren (rén Among them, A, C, E, G and N are yang dryness, while B, D, J, Xin and Gui are yin dryness.

Two: twelve earthly branches:

Zi, Ugly, Yin, Mao, Chen, Wu, Shen, You. Among them, Zi, Yin, Chen, Wu, Shen and Xu are Yang branches, while Ugliness, Mao, Si, Wei, You and Hai are Yin branches.

Three: the twelve earthly branches correspond to the twelve zodiac signs:

Rat, ugly cow, yinhu, hairy rabbit, dragon, four snakes, black horse, tail sheep, monkey, you chicken, dog and sea pig.

Then the determination of the specific date also has its own calculation method

The ordinal numbers of Rhizoma Drynariae are: 1 (A), 2 (B), 3 (C), 4 (D), 5 (E), 6 (F), 7 (G), 8 (Xin), 9 (N), 10 (D).

The ordinal numbers of earthly branches are as follows: 1 (Yin), 2 (Mao), 3 (Chen), 4 (Si), 5 (noon), 6 (Not), 7 (Shen), 8 (unitary), 9 (Xu), 10 (.

Annual trunk and branch calculation:

① Annual dry formula: annual dry = annual single digit -3 (applicable to any year, single digit is less than 3, borrow 10).

② Annual branch formula: annual branch = (year +7)÷ 12 remainder (divisible by remainder 0, that is, remainder 12= ugly).

③ Simplification of annual expenditure:

(two digits at the end of the year-1)- 12*N= annual branch (applicable to the 20th century, that is, 1900- 1999).

(year-end double digits +3)- 12*N= annual expenditure (applicable to 2 1 century, i.e. 2000-2099).

Monthly trunk and branch calculations:

① Monthly dry formula: monthly dry = annual dry x2+ monthly dry (if the total exceeds 10, directly take single digits).

Daily branch calculation:

On Gregorian calendar days, folks often adopt the algorithm of New Year's Day, and then infer a certain day in the solar calendar. Because leap years are all Shen Zichen years, with 366 days, and normal years are all 365 days, so the number of days is fixed, and the number of days in each month is also fixed. Therefore, as long as you know New Year's Day, you can calculate the number of days in a year and the number of days from New Year's Day, and subtract 60 times the number of days to calculate a certain day.

Extended data:

The ancient working people originally assigned representative words to the weather of a day. If the sun comes out in the morning and plants begin to grow, this time is dubbed "wood".

At noon, the sun is the strongest, and the air and the earth are scorching, so this time is nicknamed "fire, gold" and "fire earth". 5-7 pm is the driest, and the fruit has high sugar content. At this time, it was nicknamed "gold". At midnight 12, everything was calm, and this time it was dubbed "water".

Beijing time, to be exact, refers to the local time in the area where East longitude 120 degrees is located. Since Beijing is about 1 17 degrees east, Beijing time is 12: 12, which is the local standard time in Beijing.

Different areas in the east or west should be calculated according to the local east longitude. The earth rotates once (360 degrees) from west to east, which takes 24 hours, and every 4 minutes is 1 degree (the distance between 1 degree is 4 minutes, the principle of "adding east and subtracting west"). Other areas can be calculated according to this.

Baidu Encyclopedia-heavenly stems and earthly branches