When is the vernal equinox of 202 1? March 20, 2026 5438+0.

Time and date of vernal equinox of 202 1: Saturday, February 8, 20021.

Every year around March 20th of Gregorian calendar, the sun is located at 0? (vernal equinox), it is the vernal equinox. On this day, the sun shines almost directly on the equator of the earth, and the day and night are almost as long around the world (the refraction of the sun's light by the atmosphere and the shadow of the morning are not considered here). After the vernal equinox, the direct point of the sun continues to move from the equator to the northern hemisphere, and the days in the northern hemisphere 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. Therefore, the vernal equinox is also called the vernal equinox. At the North Pole and South Pole, at the vernal equinox, the sun is on the horizon all day. After that, as the direct point of the sun continued to move northward, a six-month polar day began near the North Pole, and the scope gradually expanded. A six-month polar night began near the South Pole, and the scope gradually expanded.