How can we accurately distinguish between "festival" and "qi" in the 24 solar terms?

The accurate distinction between "Jie" and "Qi" in 24 solar terms is as follows:

Among the 24 solar terms, "festival" refers to a period of a year, which is a representation of a period of time; And "qi" refers to climate, which is an overview of weather changes. Together, these two words refer to the weather changes at a certain stage of the year.

As early as the Spring and Autumn Period and the Warring States Period, people in China had the concepts of Solstice in the South and Solstice in the North. Subsequently, people divided the year into 24 equal parts according to the relationship between the running position of the sun and the moon at the beginning and middle of the month and the natural utilization such as weather, animal and plant growth. And took a proper noun, that is, twenty-four solar terms.

By the end of the Warring States Period, there were eight solar terms, such as beginning of spring, Equinox, Long Summer, Summer Solstice, beginning of autumn, Autumn Equinox, beginning of winter and Winter Solstice. These eight solar terms are the heaviest of the 24 solar terms.