A set of 24 solar terms and winter solstice computer wallpapers are shared with everyone. Winter solstice, also known as “winter festival” and “winter festival”, is one of the 24 Chinese solar terms and one of the eight astronomical solar terms, opposite to the summer solstice.The winter solstice begins when the sun reaches 270° of ecliptic longitude, which is around December 22 of the Gregorian calendar every year.