What month is the light rain solar term?

Vernal equinox, light rain, summer solstice ... refer to the lunar calendar, the time is fixed, and the solar calendar is not fixed.

1, vernal equinox

The vernal equinox is the midpoint of 90 days in spring. One of the 24 solar terms, around March 20 of the Gregorian calendar every year, when the sun is located at 0 (vernal equinox) of the yellow meridian. On the vernal equinox, the sun shines directly at the equator of the earth, and the seasons in the northern and southern hemispheres are opposite. The northern hemisphere is the vernal equinox and the southern hemisphere is the autumnal equinox. The vernal equinox is a new year in Iran, Turkey, Afghanistan, Uzbekistan and other countries, with a history of 3,000 years. ? Twenty-four solar terms: "in mid-February, half a minute, that is, half of 90 days, so it is called minutes." Autumn is synonymous. "

"Spring and Autumn Stories Yin and Yang in and out" said: "The vernal equinox, Yin and Yang are also half-phase, so it is cold and summer day and night." The vernal equinox is also a festival and ritual celebration. The ancient emperors had a system of offering sacrifices to the sun in spring and the moon in autumn. The ritual of the Zhou Dynasty was to offer sacrifices on the altar. Book of Rites: "Altar." Ying Da Shu by Confucius: "Also called vernal equinox". ? In the Qing Dynasty, Pan Rongbi wrote "Ji Sheng at the age of Emperor Jingdi": "The vernal equinox and autumn are divided into national gifts, and scholars should not worship them.

2. Summer solstice

Summer solstice is one of the 24 solar terms, which occurs on June 2 1 or 22 of the Gregorian calendar every year. On the day of summer solstice, the sun moves to 90 degrees of the yellow meridian (summer solstice, currently in Gemini), and the position where the sun directly hits the ground reaches the northernmost point of the year, almost directly to the Tropic of Cancer. At this time, the daylight hours in all parts of the northern hemisphere reach the longest in the whole year. For the Tropic of Cancer and its northern area, the summer solstice is also the highest day of the year at noon.

During the summer solstice in Beijing, the daytime can be as long as 15 hours, and the height of the sun is as high as 73 32' at noon. On this day, the northern hemisphere gets the most sunshine, almost twice as much as the southern hemisphere. ? Astronomical experts say that the solstice in summer is the turning point of the sun. After this day, I went back. The direct sunlight point moved southward from the Tropic of Cancer, and the daylight in the northern hemisphere became shorter and shorter day by day. After the summer solstice, the height angle of the sun at noon will also decrease day by day in the Tropic of Cancer and its northern area. At the same time, after the arrival of the summer solstice, the stars in the night sky gradually became summer stars.