Shortest solar term at night

Summer solstice (around June 22nd) has the longest day and the shortest night.

The winter solstice (about 65438+February 2 1) is the longest night and the shortest day.

The southern hemisphere is just the opposite. The reason is that there is an oblique angle between the earth's axis and the sun.

In addition, at the vernal equinox (about 2 1 year in March) and the autumnal equinox (about September 23rd), the sun shines directly at the equator, and the world is divided equally between day and night.