Is June 22nd the summer solstice?

No. According to the calendar information, June 2 1 day is the summer solstice, and June 22 is the Dragon Boat Festival. The summer solstice is the 10 of the 24 solar terms. Fighting means noon; The yellow meridian of the sun is 90 degrees; June 2 1~22 of Gregorian calendar. On the day of summer solstice, the position where the sun shines directly on the ground reaches the northernmost part of the year, almost directly on the tropic of cancer. At this time, the daylight hours in all parts of the northern hemisphere reach the longest in the whole year.