What are the four seasons and eight festivals in ancient times?

Four seasons: refers to the four seasons of spring, summer, autumn and winter; Eight solar terms: beginning of spring, vernal equinox, long summer, summer solstice, beginning of autumn, autumnal equinox, beginning of winter and winter solstice. Four point one year old, three months in spring, summer, autumn and winter, two solar terms and twenty-four solar terms per month. Among them, beginning of spring is the first solar term among the 24 solar terms and the first solar term in spring, which means that a new round of cycle has begun. Great cold is the last of the 24 solar terms, which means the weather is extremely cold. After the great cold, a new cycle will begin.

Twenty-four solar terms are special festivals that express the change of natural rhythm and establish "December" in China calendar method. They can accurately reflect the change of natural rhythm, contain a long cultural connotation and historical accumulation, and are an important part of the long history and culture of the Chinese nation. The "twenty-four solar terms" are beginning of spring, rain, fright, vernal equinox, Qingming, Grain Rain, Changxia, Xiaoman, Busy, Summer Solstice, Xiaoshu, beginning of autumn, Chushu, Bailu, Autumnal Equinox, Cold Dew, Early Frost, beginning of winter, Light Snow, Winter Solstice, Slight Cold and Severe Cold. "