The summer solstice is the first solar term to be determined among the twenty-four solar terms. In the 7th century BC, our ancestors used Tugui to measure the shadow of the sun and determined the summer solstice.

High temperatures, high humidity, and thunderstorms from time to time are the characteristics of the weather after the summer solstice.

The summer solstice is in the position of mid-summer, that is, the noon position, and noon belongs to Yang. Although the summer solstice is more yang and has the longest day, it is not necessarily the hottest day of the year, so it is close to the surface of the earth at this time. The heat is still accumulating and has not reached its maximum.

The Summer Solstice is not only one of the twenty-four solar terms, but also one of the folk festivals of the "Four Seasons and Eight Festivals" in ancient times. Since ancient times, people have had the custom of worshiping gods and ancestors at the Summer Solstice.

In addition, after the summer solstice, people generally consume refreshing soup, herbal tea, sour plum soup, etc. to escape the heat.