What does summer solstice mean?

Summer solstice summer means "summer" or even "extreme", so summer solstice means the longest summer day.

The solstice of summer represents the arrival of midsummer. After the summer solstice, it will get hotter and hotter. From summer to the third watch in the future, we will enter the dog days, which will be the hottest time of the year. 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 the summer solstice, the sun goes directly to the northern hemisphere and reaches the northernmost point of the year, on the tropic of cancer (23 27' north latitude). On this day, the sun in the northern hemisphere has the largest altitude angle, the shortest shadow, the longest day and the shortest night. The farther north, the longer the days.