How are the seasons of the year divided?

Spring, summer, fall and winter, each season lasts three months. The four seasons of the year are formed because the earth revolves around the sun. China's traditional method of dividing the seasons is based on the changes in the sky, with the "Four Lives" of the twenty-four solar terms as the starting point of the seasons.

Nowadays, the four seasons are often divided according to the temperature changes, using the modern scholar Zhang Bao Koon's "average temperature" division, according to this standard division of the four seasons, the mid-latitude region seasons and the "average temperature" is basically the same as that in the low latitudes and the polar regions. The temperature changes in spring, summer, fall and winter near the poles are not very obvious.

In the Southern Hemisphere, the timing of the seasons is just the opposite of the Northern Hemisphere. When it is summer in the Southern Hemisphere, it is winter in the Northern Hemisphere; when it is winter in the Southern Hemisphere, it is summer in the Northern Hemisphere.

Extended information:

Seasonal transitions encompass a wide range of features such as climate change and climatic variations, such as spring emergence, summer bloom, fall harvest, and winter storage, which mark the development of things.

In the division of the four seasons, the visual position of the sun on the ecliptic is used as the basis, with the bifurcation of the day, the second solstice, or the fourth day of the month as the boundary; however, the boundary points used by the East and the West in the division of the four seasons are not exactly the same.

China's traditional method of dividing the four seasons is to take the "four risings" of the 24 solar terms as the starting point of the four seasons, and to take the bisections and solstices as the midpoints. Such as spring for the beginning of spring, the sun's ecliptic for 315 °, spring for the midpoint, the end of summer, the sun's ecliptic becomes 45 °, the sun runs 90 ° on the ecliptic.