Why is 24 solar terms consistent with the Gregorian calendar?

24 solar terms depends on the solar calendar. Its accuracy is similar to that of the Gregorian calendar, and it is the most accurate way to date years.

Some people think that the 24 solar terms are subordinate to the lunar calendar, but they are actually defined according to the solar calendar. That is, according to the position of the sun on the ecliptic, a year is divided into 24 equal parts. That is to say, the ecliptic is divided into 24 equal parts, each equal part accounts for 15 of the ecliptic. Because the time required for the sun to pass through each bisection is almost equal, the Gregorian calendar dates of the 24 solar terms are roughly the same: the first half of the year is around 6 and 2 1, and the second half is around 8 and 23.

As early as the Spring and Autumn Period, the ancient sages of China set four solar terms, namely midsummer, midsummer, midsummer and winter solstice, and constantly improved and perfected them. By the Qin and Han Dynasties, the 24 solar terms had been completely established. The intangible cultural heritage of the twenty-four solar terms of the lunar calendar is very rich, including related proverbs, songs and legends, traditional production tools, utensils, handicrafts, calligraphy and painting, as well as Han festival culture, production ceremonies and folk customs closely related to festivals.