When are the vernal equinox, summer solstice, autumn equinox and winter solstice?

The vernal equinox is on March 20th or March 2nd1day every year.

Summer solstice, June 2 1 or 22 every year.

September 23rd or 24th is the autumnal equinox every year.

The winter solstice falls on February 2 1 or 22 every year.

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Summer solstice was also called "Summer Festival" and "Summer solstice Festival" in ancient times. It is not only one of the 24 solar terms, but also a festival in the ancient folk "four seasons and eight festivals". Since ancient times, there has been a custom of worshipping gods and ancestors on the solstice in summer to pray for disaster relief and bumper harvest.

The vernal equinox, one of the 24 solar terms, is the fourth solar term in spring. The significance of the vernal equinox, first, refers to the equal division of day and night, each of which is 12 hours; Second, the vernal equinox is in the middle of spring (from beginning of spring to Changchun), and the spring is equally divided.

The autumnal equinox is the sixteenth of the twenty-four solar terms. On the day of the autumnal equinox, the sun reaches 180 (autumnal equinox), almost reaching the equator of the earth, and the whole world is as long as day and night. In ancient times, there was a saying that "the sun is sacrificed in spring and the moon is sacrificed in autumn", and the autumnal equinox was once a traditional "moon festival". 20 19 Mid-Autumn Festival is a traditional "Moon Festival". ?

Winter solstice, also known as short solstice, winter festival and sub-year-old, has both natural and humanistic connotations. It is not only an important solar term among the 24 solar terms, but also a traditional folk festival in China. In some areas along the southern coast of China, there is a custom of offering sacrifices to ancestors during the winter solstice; In northern China, it is a custom to eat jiaozi from winter to Sunday every year.