The origin of the lunar calendar and mystery

To the mysteries of the eight words completely, it is necessary to have a system of knowledge of the traditional Chinese calendar, because the eight is arranged according to the characteristic in the history of China "power" method, and the power of discipline method and based on the lunar calendar, so it is necessary for us to make a calendar system first introduction.

As you all know, in the length of the unit, is equal to 1 meter 100 cm, in the unit of weight 1 kg is equal to 1000 grams.Among them into the rate is very simple, because it is artificial, natural won't trouble trouble until trouble troubles you to build more complex carry system.Calendar is the relationship between processing day, month, year.They are all natural unit of time, during which the conversion relation is not as simple as between weight or length.To be sure we also might as well use similar approaches, such as, the basic unit of the day as a measurement of time, and then gave a name to 100 days or 1000 days, for the use of records longer than a day.But since ancient times, people request calendar is not only simple and easy to remember, but also the main is: in sequence from the day, and directly show the moon appearance changes or the cycle of seasons.Therefore, to the principle of a deeper understanding of the calendar also must know: day, month and year is how to return a responsibility?How is decided?The relationship between them?

Lunar calendar of the day:

The earth rotates around the sun once time is defined as one day.

The lunar month:

The lunar month is the moon round as the standard, a round moon cycle, called a lunar month, is a lunar month average 29.5306 days.In order to make the number of days each month is an integer, the lunar month is divided into both monthly and miscarriage, monthly for 30 days, abortion is 29 days.In this way, can come close to the average length of 29.5306 days per month.General is a monthly intervals and a miscarriage, but due to the fixed ShuoRi as the first day of a month -- the first day, therefore, is hard to avoid consecutive monthly or continuous abortion.

The lunar calendar year:

Lunar calendar years in the cycle of the earth around the sun (tropical year) shall prevail, but the tropical year is 365.2422 days, this is more than twelve days of lunar month, and less than 13 days of lunar month.If the lunar calendar is twelve months every year, only three hundred and fifty-four days a year, more than a return to the young 11 days or so, year after year differ, if this yearThe Spring FestivalIs in the winter, then 16 years they became summer Spring Festival.In the preparation of the lunar calendar, every day has a month to make the meaning of the moon (the same one and moonless night, about 15 is a full moon), is given priority to with the moon cycles of motion of the earth, at the same time for the meet season season, adopted the method of "nineteen years 7 leap month" to cooperate with the cycle of the earth around the sun.In 19 years, twelve leap year, leap year twelve months each year, there are seven leap year, leap year 13 months each year.Such 19 tropical year is 6939.6018 days, 19 lunar year is 6939.6910 days, both is similar, month and season can also keep them consistent.This is the lunar set a leap month.

The lunar leap which is how to determine a month?This involves the throttle.In a yearThe 24 solar terms, is actually a dozen throttle and twelve gas.Lunar calendar with twelve gas as a symbol of twelve months, the months have a certain amount of gas, such as rain for the first month of gas, gas spring into February, and so on.But between the gas and gas, or between solar terms and solar terms, the average is 30.4368 days, and a lunar month is 29.5306 days, so the throttle or gas in the month of the lunar calendar date postponed from month to month, to a certain time, gas is not months but moved to the end of the month, then the next month will probably not gas, with only a throttle.The month of no gas as the leap month of the year.Such as the lunar calendar has not that contains only a month after June a throttle (beginning of autumn), and gas great heat on June 30, the next gas limit of heat to another a month of the second day, so, in the middle this month without gas as a leap in June.

Thus, "year, month, day of the lunar calendar is not only a digital recording, and objectively reflect the interaction relationship between the sun, the moon and the earth, which means it has the rich physical meaning, it is not hard to see from the lunar calendar in the role of agricultural production.But, in the eight methods "year, month, day" ji method is different from the lunar, month and the lunar calendar, and with the moon round the cycle to determine method is not the same, in the horoscope method is used in the throttle set method.