Why is the summer of solstice called the summer of solstice?

On the solstice in summer, the day is the longest and the night is the shortest. What it means is that the heat is coming.

As one of the 24 solar terms, the summer solstice is the first solar term to be determined. Its climate is characterized by heavy rain, plum rain and high temperature sauna.

In the seventh century BC, the shadow of the sun was measured by civil soil gauges to determine the summer solstice. "Zunxian Manuscript" records: "The sun arrives in the north, the days are long and the shadows are short, so it is called the summer solstice. Do your best. Generally speaking, the name of the summer solstice only represents the solar terms of the summer solstice, which means that the hot summer is coming.