What is "12 times"

In ancient China in order to observe days, months, five star position and movement, the yellow equatorial belt from west to east is divided into twelve parts, called the twelve times.In turn, the names of the twelve times: xing ji, xuan Xiao, Ju also, Lou, girders, shen, quail, quail, quail, longevity, fireThe fireWood, analyse.The spring and autumn period and the warring states period of zuozhuan, "mandarin" and so on has the name recorded in the book, they are used to describe Jupiter (Jupiter) position.Ancient star cycle of Jupiter as twelve years, so it is generally believed that a dozen of creation is originated from the observations of Jupiter.Its time about in the spring and autumn period or earlier.But in the "national language", "featuring Yin, and age in quail fire."On this basis, a dozen also could push to the era of Yin at the end of the week.