What does the vernal equinox mean? What does this solar term mean?

The vernal equinox, autumnal equinox, winter solstice and summer solstice, also known as "two points to two days", are the four most important symbolic solar terms among the 24 solar terms. The twenty-four solar terms say, "Mid-February. The division is half, and this is half of ninety days, so it is called division. " At the vernal equinox, the sun reaches the meridian zero, which happens to be in the middle of February. Because the vernal equinox is divided into two halves, it is called the vernal equinox.

At the vernal equinox, the change of nature is characterized by the same length of day and night. The story of Spring and Autumn Annals says, "The vernal equinox is characterized by yin and yang, so the day and night are flat, and the cold and summer are flat." There are two such "semi-cloudy and semi-sunny" days every year, one is the vernal equinox and the other is the autumnal equinox, so there is a proverb that "the vernal equinox and autumnal equinox are equally divided day and night".

Extended data:

At the vernal equinox, China entered a bright spring except the Qinghai-Tibet Plateau, the northeast, the northwest and the northern part of North China. The average daily temperature in all parts of China has steadily increased to above 0℃ except the mountainous areas in winter and the areas north of 45 north latitude.

At this time, the cold has passed and the temperature has risen rapidly, especially in North China and Huanghuai Plain. The daily average temperature rises to above 10℃ almost at the same time as the rainy areas along the Yangtze River and the south of the Yangtze River, entering a bright spring. On the vast land, on the bank of willow green, the grass grows in Fei Ying, the wheat is jointing, the rape blossoms are fragrant, the peach blossoms are red, and Li Bai is coming in spring. South China is a scene of late spring. ?

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