Autumn is divided into months and seasons.

Autumn is divided into three stages: Qiu Meng, Mid-Autumn Festival and Qiu Ji.

In ancient times, a year was divided into four seasons, each of which accounted for three months. These three months can be represented by "Meng, Zhong and Ji" respectively. According to the schedule of the 24 solar terms of the lunar calendar:

1, the seventh month of the lunar calendar is Qiu Meng, and according to the solar terms, it is beginning of autumn (the sun is at 135 degrees, and the festival is on August 7-9) and long summer (the sun is at 150 degrees, and the festival is on August 22-24);

2. August is mid-autumn, and solar terms are two days with solar terms of Millennium (the sun is at longitude 165 degrees, with the node on September 7-9) and the autumnal equinox (the sun is at longitude 180 degrees, with the node on September 22-24);

3. September is a season and autumn, and solar terms are two solar terms: cold dew (the sun is at longitude 195 degrees, node 65438+1October 8-9) and first frost (the sun is at longitude 2 10 degrees, node 65438+1October 23).

Extended data

Solar terms are a knowledge system and social practice formed by the ancients by observing the movement of the sun for a year and understanding the changing laws of the four seasons, climate and phenology in a year. The ancients in China divided the sun's annual trajectory into 24 equal parts, each of which was divided into a solar term, and each solar term had three cycles, each of which was five days.

According to the law of the operation of heaven and earth, the ancients determined the starting point and ending point of the four-season cycle and divided the 24 solar terms. The trajectory of the sun in a year is divided into 24 equal parts, each of which is a "solar term", collectively called "twenty-four solar terms".

The naming of the twenty-four solar terms reflects three seasons, phenology and climate changes.

Beginning of spring, Spring Equinox, Changxia, Lixia Solstice, beginning of autumn, Autumn Equinox, beginning of winter and Winter Solstice, also known as Eight; Phenological phenomena are amazing, clear, rich and complex. Climate change is manifested in rainfall, Grain Rain, slight summer heat, severe summer heat, intense heat, white dew, cold dew, first frost, light snow, heavy snow, slight cold and severe cold.

Baidu encyclopedia: solar terms

Baidu Encyclopedia: Qiu Meng

Baidu encyclopedia: Mid-Autumn Festival

Baidu Encyclopedia: Qiu Ji