How to distinguish the vernal equinox from the autumn equinox?

Only the vernal equinox and the autumnal equinox should be as long as two days and nights in a year. Spring is divided into the fourth solar term among the twenty-four solar terms of the lunar calendar, which is usually from March 19 to 22nd every year, that is, February 14 of the lunar calendar. On the day of the vernal equinox, the sun shines directly on the equator, and the time of day and night is equal all over the earth, so the ancient vernal equinox and autumnal equinox are also called "day and night equinox". There is a folk saying that "the vernal equinox and autumnal equinox are equal, and after the vernal equinox, the more the

The autumnal equinox is the sixteenth solar term in the twenty-four solar terms of the lunar calendar, usually on September 22nd or 23rd every year. The climate in the south began to decline from this solar term. From the day of the autumnal equinox, the climate has three main characteristics: the position of direct sunlight continues to move from the equator to the southern hemisphere, and the phenomenon of short days and long nights in the northern hemisphere will become more and more obvious. The days will gradually shorten and the nights will gradually lengthen (until the winter solstice reaches the longest night and the shortest day); The temperature difference between day and night will gradually increase, and the amplitude will be higher than 10℃. The temperature drops day by day, getting colder every day, and gradually entering the late autumn season. The days are getting shorter and the nights are getting longer until the vernal equinox. The situation in the southern hemisphere is just the opposite.

Both the vernal equinox and the autumnal equinox are on the equator, but you just need to remember that the revolution of the earth is from west to east (counterclockwise) and pushed by seasons. After the winter solstice, it is the vernal equinox, and after the summer solstice, it is the autumnal equinox.