What month is the vernal equinox?

Equinox: March 21; Summer solstice: June 21; Autumnal Equinox: September 22nd; Winter solstice: 65438+February 2 1.

1, the vernal equinox usually refers to the time when the sun's apparent yellow line is at 0 around February1of the lunar calendar (March 20th to February1of the Gregorian calendar) every year. The time period also refers to the position where the sun is between 0 and 15, that is, from the vernal equinox to Tomb-Sweeping Day, and the Gregorian calendar is between March 20th and April 5th.

2. The midpoint of spring is also called "vernal equinox". On this day, the sun shines directly at the equator, and the world is almost as long as day and night. After that, the position of direct sunlight moved northward, and the days in the northern hemisphere were long and the nights were short. Astronomy stipulates that spring begins in the northern hemisphere, and wintering crops enter the spring growth stage. After the vernal equinox, the direct point of the sun continues to move from the equator to the northern hemisphere, where the days are long and the nights are short, that is, the days are longer than the nights in a day; In the southern hemisphere, the days are shorter and the nights are longer, that is, the days are shorter than the nights in a day.