Another measure of days, months, the five-star location system according to the twelve times.The meaning of "time" is away, when those who suspend.The so-called "dozen" is the day, month, the five-star running through twelve.Run on the ecliptic is the sun, the moon and the stars near the ecliptic.12 times is yellow equatorial belt from west to east twelve divided into parts, their name is "xing ji, XuanLeng, she I %, Lou, girders, shen, tail first, quail, quail, longevity,The fireAnd wood."

The establishment of the twelve times, from start to finish, also experienced a very long time.

Twelve times in star and apply it in the calendar.In the calendar to paraphrase mostly likely "Jupiter" method.The origin of this method s, it is not clear, but very popular during the spring and autumn period and the warring states period.This is because in the spring and autumn and the warring states period, the governors regime, countries are using this

Title the calendar, it is not unified.In order to avoid confusion, facilitate communication, has adopted "Jupiter calendar 'remove.In zuozhuan, often appears in the mandarin 'years, "the age of star in the formation of wood at the age of quail" fire "and so on, is the law.It is formulated on the basis of Jupiter in position in the sky.Jupiter is about 12 years running a Sunday, a Sunday is divided into 12 equal, is on the mentioned 12 times.If Jupiter run to drop a surname, it said "old in Lou", if you run to the position of the girder, called "years old in the girder.We call Jupiter Jupiter is from the law.However, this law has a defect.Run a Sunday because Jupiter is not for 12 years, but 11.86 years.Every operation in 80, the actual location will be more than the ideal location at a time.Such as paraphrase, for a long time will be continuously adjusted, very inconvenient.Then use "tai sui calendar" method, is to pretend a celestial body, called "tai sui", its direction contrary to Jupiter, and speed regulation was just 12 years.When Jupiter and initial position of traditional rules, from any year Jupiter putting the location of the calculated position.But over time, we should adjust the position of the Jupiter and stepping as inconvenient.This dating method, only apply when in the spring and autumn and the warring states period, in the early han, has been abandoned and in the calendar.And 12 times on astrology or form as usual.