The winter solstice in 2023 begins on February 22, 2023 1 1: 27: 09. Today (22nd) 1 1: 27 ushered in the winter solstice solar term. As a solar term, the winter solstice originated in ancient China. According to historical records, the winter solstice is the earliest of the 24 solar terms. The ancients observed that on the solstice in winter, the sun shines directly on the tropic of Capricorn, and the northern hemisphere has the shortest daytime and the longest night. Winter marks the official start of winter, and it is also the starting point for the gradual increase of yang. In ancient times, the winter solstice was regarded as the key moment of the transformation of Yin and Yang, which was of great agricultural and astronomical significance.