When is the longest and shortest day in a year?

The solstice day in summer is the longest and the solstice day in winter is the shortest. The summer solstice falls on June 2 1 or 22 every year. On the day of summer solstice, the direct position of the sun on the ground reaches the northernmost point of the year, almost directly to the Tropic of Cancer, and the daytime in the northern hemisphere is the longest, and the farther north it is, the longer it is. It is the longest day in a year in the northern hemisphere, and it takes about fourteen hours from sunrise to sunset in the south of China. 65438+February 22nd is the "winter solstice" among the 24 solar terms. When the sun meridian reaches 270 degrees, the winter solstice solar terms begin. In winter solstice, the sun shines directly on the tropic of Capricorn, with the shortest day and the longest night in the northern hemisphere, and the cold days begin from winter solstice.

The winter solstice is a very important solar term, and it is also a traditional festival in China's lunar calendar. Up to now, there are still many places where the winter solstice festival is held. The winter solstice is commonly known as "Winter Festival", "Dragon Solstice Festival" and "Asian New Year Festival". Summer solstice was also called "Summer Festival" and "Summer solstice Festival" in ancient times. In the ancient summer solstice, people prayed for disaster and prosperity by offering sacrifices to God.