The implication of the vernal equinox in 2022 and its related knowledge.

1, the spring equinox is rich in meaning. In terms of solar terms, it belongs to the fourth season of spring. At this time, the solar calendar reaches 0, usually around March 20. Astronomically speaking, the length of day and night is similar, and the direct point of the sun comes to the equator. From this day on, it will move northward until the summer solstice, which will be the longest day. In ancient times, the vernal equinox also meant to divide the spring equally, because with the arrival of the vernal equinox, the weather became warmer, crops began to grow, and agricultural life became busier. Everyone pays great attention to water storage and irrigation, and they are not allowed to go to the river to wash clothes on the day of the vernal equinox for fear of lack of rain and drought.

The vernal equinox is one of the twenty-four solar terms and the fourth solar term in spring. The fingers do not match, the longitude of the sun reaches 0, and the festival is held on March 19-22 of the Gregorian calendar every year. The vernal equinox is of great significance in astronomy. On this day, the northern and southern hemispheres are divided equally day and night. Since then, the direct position of the sun has continued to shift from the equator to the northern hemisphere. The days in the northern hemisphere are longer than the nights, while the southern hemisphere is the opposite. In terms of climate, there are also obvious characteristics. In addition to the Qinghai-Tibet Plateau, Northeast China, Northwest China and North China, China has entered a beautiful spring.