What is summer heat? Has the weather changed?

Summer is the first 14 of the 24 solar terms. Around August 23rd, the sun reached longitude 150.

Twenty-four solar terms: "In mid-July, this place will stop, and the summer heat will stop here." Since then, the temperature in the area north of the Yangtze River in China has gradually dropped.

The "location" of daylight saving time means "termination", and daylight saving time means "the summer heat officially ends". Therefore, there is a saying that fighting for summer heat in autumn refers to the time from autumn to summer heat. Although it feels like autumn, the heat in summer has not decreased.