What is the meaning of "Eight-year-old Festival" in ancient China?

Let's start with "four years old" (four o'clock)

18 years old, generally speaking, it is perennial. Spring, summer, autumn and winter.

"The so-called gate of power in the past has been stabbed since the Euler era, that is, it will not go for years." Liu Yi Zhang Shu, a newspaper of Ming Zongchen.

Secondly, say "eight paragraphs".

1. Divided by solar terms. In ancient times, beginning of spring, Changxia, beginning of autumn, beginning of winter, Spring Equinox, Summer Solstice, Autumn Equinox and Winter Solstice were divided into eight sections.

"Everything has eight knots and twenty-four qi." -"Zhou Kuai Shu Jing" volume.

"The second is extremely cold and hot; Dichotomy, the sum of yin and yang; Four stands, the beginning of growth and collection; This is eight stanzas. "

2. Divided by festivals. This is more complicated. . . .

The eight festivals in ancient festival culture are in chronological order from Shangyuan to Qingming to Long Summer to Dragon Boat Festival to Central Plains to Mid-Autumn Festival to Winter solstice to New Year's Eve.

Another saying is "three yuan and five waxes"

"Sanyuan Festival" (the 15th day of the first month is Shangyuan Festival, the 15th day of July is Zhongyuan Festival, and the 15th day of October is Xiayuan Festival), plus five wax days (the first day of the first month, the fifth day of May, the seventh day of July, the first day of October and the eighth day of December).

Since ancient times, festivals have been different due to the changes of regions, times and folk customs. So in 2006, Chongqing Publishing House published Eight Traditional Festivals in China. Write a summary of local customs and culture one by one. Summarize the eight major festivals in China-

Spring Festival ~ Lantern Festival ~ Tomb-Sweeping Day ~ Dragon Boat Festival ~ Qixi Festival ~ Mid-Autumn Festival ~ Double Ninth Festival ~ Laba Festival ~

These eight articles are the most correct explanations of "traditional festivals" so far.