When is the longest day in a year?

The summer solstice (June 20th, or 2 1, or 22nd) is the longest sunshine day in the northern hemisphere (and the shortest sunshine day in the southern hemisphere).

The summer solstice is the northernmost day of direct sunlight in a year, the longest day of sunshine in the northern hemisphere, and the longest day when the daylight exceeds the darkness.

On the contrary, the winter solstice (65438+February 2 1, or 22nd, or 23rd) is the day with the shortest sunshine time in the northern hemisphere (and the longest sunshine time in the southern hemisphere).