What are the criteria for dividing spring, summer, autumn and winter?

In ancient times, four seasons began in beginning of spring, Changchun, beginning of autumn and beginning of winter. Others regard January to March as spring, April to June as summer, July to September as autumn and October to December as winter.

In western astronomy, the vernal equinox, summer solstice, autumn equinox and winter solstice are the beginning of each season.

In modern times, the solar calendar usually takes March-May as spring, June-August as summer, September-165438+10 as autumn, and 65438+February as winter. China folks usually take climate, especially temperature, as the standard to divide the four seasons. The climate varies from place to place, so the length of the four seasons is different, and sometimes the difference is even great.

Spring:

Summer:

Autumn:

Winter:

Extended data:

A Chinese character in spring, summer, autumn and winter, the pinyin is ch ū n xi à qi ū d ū ng, which refers to the four seasons of the earth in a year and is the result of the earth's orbit around the sun. The source is The Romance of Sui and Tang Dynasties won by Chu people in Qing Dynasty.

Spring, summer, autumn and winter, also known as the "four seasons", are the results of the earth's orbit around the sun. Spring begins with "beginning of spring" in the 24 solar terms, and summer begins with "Long Summer". Autumn begins with beginning of autumn; Winter begins in beginning of winter. It is the most accurate in the Yellow River Basin. The basic laws summarized by the working people in China are: spring birth, long summer, autumn harvest and winter storage. This is also the basic idea of the relationship between man and nature elaborated in China classics such as Huangdi Neijing.

References:

Baidu Encyclopedia _ Spring, Summer, Autumn and Winter