What is the shortest day in a year?

The shortest day of the year is called the winter solstice.

Reason: Because the sun moves back and forth between the Tropic of Cancer (23 degrees and 26 minutes north and south latitude), in winter in the southern hemisphere, the sun shines directly on the northern hemisphere and moves slowly to the Tropic of Cancer, and in winter solstice in the southern hemisphere, the sun reaches the Tropic of Cancer. At this time, it can be understood that the sun is farthest from the southern hemisphere, that is, the sunshine time is short and the day is short. Since then, the sun has moved from the Tropic of Cancer to the Tropic of Capricorn. The sun is getting closer and closer to them, and the sunshine time is getting longer and longer, so the solstice in winter is the shortest, the solstice in summer is the longest and the night is the shortest.

Winter solstice, also known as solstice, winter festival, child year, etc. It has both natural and humanistic connotations. It is not only an important solar term among the 24 solar terms, but also a traditional folk ancestor worship festival in China. The solstice in winter is one of the eight festivals in four seasons, and it is considered as a big holiday in winter. In ancient times, there was a saying that the winter solstice was as big as a year. The custom of winter solstice varies in content or details due to different regions. In southern China, there are customs of offering sacrifices to ancestors and enjoying the winter solstice. In northern China, it is a custom to eat jiaozi from winter to Sunday every year.