perpetual calendar

Perpetual calendar is a kind of calendar reference book that arranges Gregorian calendar, lunar calendar and trunk calendar together correspondingly. Check the perpetual calendar, mainly when using the calendar.

Chronology of Ganzhi is the oldest calendar in China. It is based on the astronomical phenomena, conforms to the phenological characteristics, and embodies the rise and fall of the five elements. In many disciplines, it plays an irreplaceable role in other calendars. It has special practical value in the fields of traditional Chinese medicine, qigong, Zhouyi mathematics, farming, calendar and so on. Whenever you need to use cadre discipline and users don't have a perpetual calendar, you will often be at a loss.

As long as you remember the song formula of 14 characters, you can quickly calculate the time of one year. This method of quick mental calculation of perpetual calendar is called "silver disk", which is a perpetual calendar speed algorithm created by folk magicians. It has a long history. In the past, it was dictated by master and apprentice, and it was forbidden to spread abroad. Here, we will put the "silver plates" together and make them public to further explore the secrets.

"Silver plate" is a method to calculate the time of dry and branch according to the lunar calendar.

The lunar calendar is divided into a big moon and a small moon. The big moon has 30 days and the small moon has 29 days. If abortion is not considered, two months in the lunar calendar is 60 days, which is consistent with the number of 60 branches of a nail, that is, one nail can overlap every two months. According to this rule, knowing the daily trunk and branch on the first day of the first month of a certain year is equivalent to knowing the daily trunk and branch on the first day of March, May, July, September and November, and the daily trunk and branch on the first day of these months should be the same (if there is a leap month, the minutes change slightly every month) because there are abortions in the lunar calendar, as long as we know how many abortions there are in a certain year, they are respectively

Psychological calendar, we must understand the following four points:. (1) year and year; (2) the daily expenditure on the first day of the first month; (3) beginning of spring date and time; How many months are there in a year?

The Silver Plate solved the above four problems satisfactorily in only fourteen words. In order to keep secret, the creator of the "silver plate" adopted the method of "encryption" when compiling the formula, that is, many names are often used in the same branch. To do this, first of all, it provides more phonology to make the edited songs rhyme. More importantly, it "encrypts" the heart algorithm. Many appellations in the same place are used interchangeably, even if outsiders hear them, they can't understand them.

"Silver Plate" not only encrypts the title of the earthly branch, but also sets some abbreviations of related months to facilitate the memory and control of the number of words in the song. In the month, it can be called "golden cicada". In addition, when a leap month is encountered, it is represented by front, back and double respectively. For example, the last five refers to leap May, the first three refers to the first three months, and the double seven refers to the first two July.

It is found that there is a certain law between solar terms and lunar months, which can be revised. As long as the corresponding correction value is added, the holiday date of any solar term in the whole year can be calculated from the Spring Festival. Most solar terms are within an hour. There will be several hours' error in the calculation of individual solar terms, but achieving such accuracy through careful algorithm can fully meet the actual requirements. The ancients had stipulated a correction number, which was not very accurate. After careful calculation, the author redefines the correction value. Song formula is:

Beginning of spring has always had its roots.

The third time, when the stab is backward,

You know, Tomb-Sweeping Day,

You don't need to add or subtract to make a dragon altar.

Eight o'clock is a long summer,

Retreat for two days,

Four o'clock in the third day is a faint summer.

For five days in autumn, there is no food and clothing.

The 5th 10 is the turn of the millennium.

At 5 o'clock on the 6 th, outdoors,

The winter festival starts at 7: 00 on the 6th.

It snowed at four o'clock on the 6th.

At 9 o'clock on the 5th, I had a slight cold.

The calculation will not be half a day.

The above is the calculation of different solar terms from the time of the Spring Festival, and different time correction values need to be added. Knowing the revised values of the twelve solar terms from beginning of spring, we can calculate the node time of any solar term in a year according to the song "Silver Fish". Knowing the node time, we can determine the beginning of a year.

Take 1957 as an example, calculate the beginning of winter time and determine the year and month of the main branch.

The song "Silver Plate" goes: "Ding You is the fifth snake, and the wooden bureau has used the knife four times to declare ugliness." The expression of "Silver Plate" means: Ding Youzai is 1957 years old, whose main branch is Guimao on the first day of the first month, and beginning of spring on the fifth day of the first month. October, February, June, leap August, April, July and December are abortion months, and that year is leap August.

Beginning of winter Festival is October Festival, because it is in August of that year, so beginning of winter Festival is in the middle of September of the lunar calendar, beginning of spring is on the fifth day of the first month of that year, and beginning of winter is on the fifth day of the ninth month. Beginning of winter has experienced five miscarriages before (miscarriages on the 29th and dry months on the 30th). First of all, five days have been added, and the revised value is six days and seven hours, which is the beginning of winter.

The date in beginning of winter is: September 5th at 4: 00+(5th)+(6th at 7: 00) = September17th.

According to the rule of "Five Tigers Escape", the month of Ganzhi is the month of Xinhai. Taking 1938 as an example, the seasonal time of awn species is calculated and the years and months of trunk and branches are determined.

There is a cloud in "Silver Plate": "Wuyin Guihai is on the fifth day, Ewing Longyang is on the seventh day".

The expression of "silver plate" means: 1938 years old, in the second day of grade two, Guihai was on the first day of the first month, and beginning of spring was on the fifth day of the first month of that year. April, August, March, June, July and November of that year were abortion, which was a leap July in a year.

The Miscanthus Festival is May Festival. Mangzi experienced two small moons in March and April, and the correction value was one hour after two days. In beginning of spring, the fifth day of the first month and the fifth day of May were designated as Miscanthus Festival. The crossing time of the Miscanthus Seed Festival is: May 5th+(two days)+(two days-1 hour) = May 9th. According to the "five tigers capture" regulation, the month of dry support is Wuwu month.

"Silver plate" is a mental calendar method created by China ancestors in social practice. As long as you master the hot practice of sixty jiazi and memorize fourteen words, you can work out a calendar for one year. By memorizing hundreds of words (dozens of songs), you can calculate a calendar for decades. It can be said that learning this method, that is, having an almanac on your chest, is of great practical value. Now, we strongly advocate academic exchanges. We can completely get rid of the encryption method of "silver disk" and rearrange the songs to make them more concise and easy to remember, so that more people can master the heart calendar and let this secret hidden in the people serve the society.

Attention; The ancient songs in this paper are provided by Mr. Luan Changming from Feicheng, Shandong Province.