When is the winter solstice this month?

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

The vernal equinox on March 20th or March 2nd1day in the solar calendar is when the sun is at 0. At the vernal equinox, the direct point of the sun is on the equator, and the northern and southern hemispheres are equally divided day and night.

The summer solstice is usually on June 2 1-22 of the Gregorian calendar, that is, when the sun runs to 90 degrees of the yellow meridian. On the day of summer solstice, the direct sunlight reaches the northernmost part of the year. At this time, the daylight hours in all parts of the northern hemisphere reach the longest in the whole year.

The autumnal equinox usually falls from September 22 to 24 of the Gregorian calendar every year. On the day of the autumnal equinox, the sun reaches the longitude 180, which is almost directly at the equator of the earth, and the time around the world is as long as day and night.

On the winter solstice, the sun reaches 270 degrees, and this festival is held on the Gregorian calendar 65438+February 2 1-23 every year. The winter solstice marks the lowest sun height and the shortest day in the northern hemisphere.