What does the vernal equinox mean (March 20th or 2 1)?

The vernal equinox is one of the 24 solar terms, which falls on March 20th or 2 1.

In ancient times, it was also called "Japan-China" and "Day and Night Minute". When the sun reached longitude 0. According to the "Twenty-four solar terms": "In mid-February, it is divided into half, which is half of ninety days, so it is called minutes." Another "Spring and Autumn"? "Yin and Yang in and out of the first chapter" said: "The vernal equinox, Yin and Yang are also half-phase, so it is cold and hot day and night." On this day, day and night in the northern and southern hemispheres are the same. At this time, the sun shines directly on the equator, bloom is warm in spring, and Fei Ying grass grows, which is suitable for farming, field management and sightseeing.

As the saying goes, "The spring equinox begins with wheat, and the fat and water should follow". A spring rain was warm. After the spring rain, I was busy plowing. The busy farming season in spring is about to begin, and spring management, spring ploughing and spring planting are about to enter a busy stage. After the vernal equinox, overwintering crops enter the growth period, so field management should be strengthened.