Twenty-four solar terms were invented by China in ancient times. Why do you use the Gregorian calendar?

Twenty-four solar terms were invented in ancient China, and the reasons for using Gregorian calendar time are as follows:

The 24 solar terms have nothing to do with the Gregorian calendar, but they have nothing to do with the Gregorian calendar. But it is closely related to the relationship between the earth and the sun, because the 24 solar terms are basically related to the change of the direct point of the sun.

The vernal equinox and autumnal equinox in 24 solar terms are the days when the direct point of the sun is on the equator. The ancients even calculated the specific time, such as the vernal equinox at the end of a certain year, which means that the direct point of the sun is just at the equator.

The Gregorian calendar, also called the Gregorian calendar, is based on the changes of the sun. Of course, many human changes were added later. Although there are many human changes, it still has a high correlation with the sun.

So it seems that the 24 solar terms are related to the solar calendar, but they are not, but the 24 solar terms are related to the sun, and the solar calendar is also related to the sun, so it seems that the 24 solar terms are related to the solar calendar.