How to say it in everyday English in summer?

"Summer Solstice Day" is the tenth of the 24 traditional solar terms in China, and its English name is Summer Solstice. Summer solstice was also called "Summer Festival" and "Summer solstice Festival" in ancient times. The ancients said: "The days are long, the shadows are short and extremely extreme, so it is called the summer solstice."

On the day of summer solstice, the sun shines directly on the tropic of cancer, which is the longest day in all parts of the northern hemisphere.

At this time, most parts of the northern hemisphere get the most sunshine time, but it will not bring the hottest temperature, and the hottest temperature will come in 20 to 30 days.

During this period, most parts of the northern hemisphere receive sunshine for the longest time, but the harshest high temperature will not appear until 20 to 30 days later.