How did this year's summer solstice come into being?

Hello, you want to ask why the summer solstice in 2022 is one day earlier? The summer solstice in 2022 is one day ahead of schedule because the sun shines directly on the tropic of cancer, so it is one day ahead of schedule. The summer solstice is the 10 of the 24 solar terms. 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.