What day is the longest in 2021?

The longest day is June 21st, because this day is the summer solstice, the days are very long, but the nights are very short, so that's it.

This day is the summer solstice. The summer solstice in 2021 is on June 21, the twelfth day of the fifth month of the lunar calendar, and the days are the longest on this day.

It's June 21st, the day of the summer solstice, the day is the longest, and the daylight hours are also very long.

The longest day of the year in the Northern Hemisphere is the summer solstice. On this day, the sun's rays hit the Tropic of Cancer almost directly.

It is the highest latitude that the sun can reach in the northern hemisphere in a year, the sun travels to 90 degrees of yellow longitude (the summer solstice), and the position that hits the ground almost directly reaches the Tropic of Capricorn, and the daylight hours in the northern hemisphere reach the longest of the year.

The summer solstice is in the middle of summer, that is, noon, noon is yang; Although the summer solstice is more sunny and has the longest days, it is not necessarily the hottest day of the year, so the heat close to the surface is still accumulating and does not reach its maximum. After the summer solstice, the ground is heated strongly, and the air convection is vigorous, which is prone to thundershowers.

The summer solstice is the twenty-four solar terms.

One of them, in ancient times, it was also a festival in the folk "four seasons and eight festivals", and since ancient times, the folk had the custom of worshiping gods and worshipping ancestors on the summer solstice. In addition, after the summer solstice, people generally eat Qingbu cold soup, herbal tea, and sour plum soup.

Wait to escape the heat.

The longest day of the day is the summer solsticeOn the summer solstice, the sun almost directly hits the Tropic of Capricorn, making it the longest day of the year in the Northern Hemisphere, which falls on June 21-22 of the Gregorian calendar.

The summer solstice is the turning point of the sun's northward journey, after which the sun will turn back and the point of direct sunlight will begin to shift from the Tropic of Cancer (23°26 north latitude).'Move south. For the region north of the Tropic of Cancer in China, after the summer solstice, the height of the sun at noon begins to decrease day by day; For the area south of the Tropic of Cancer in China, after the summer solstice, the height of the sun at noon begins to decrease day by day after the direct sunlight of the southward return.

Summer solstice customs. 1. Worship gods and ancestors.

The summer solstice is one of the "four seasons and eight festivals", and since ancient times, people have celebrated the harvest and sacrificed their ancestors at this time to pray for a good year. In ancient agrarian society, people chose the day to worship God and worship their ancestors in peace and contentment, and there were various regular festivals, worshipping gods and ancestors, and offering rich sacrifices and sacrifices to develop festival feasting and drinking activities, and gradually forming some conventional celebration methods, that is, the so-called festival folk customs.

2. Eliminate summer and avoid ambushes.

On the summer solstice, women give each other folding fans, fat powder and other things. "Youyang Miscellaneous Tales and Etiquette": "On the summer solstice, there are words for entering the fan and powder fat sac. "Fan", by which the wind is generated; "Powder fat", smeared with it, disperse the turbidity generated by body heat, and prevent prickly heat.

3. Noodles should be eaten in the north and south of the summer solstice.

Since ancient times, there has been a saying in some parts of China that "winter solstice dumplings and summer solstice noodles", and eating noodles on the summer solstice is an important custom in many regions. Because the summer solstice new wheat has appeared, so eating noodles on the summer solstice also has the meaning of tasting new.

The above content reference: Encyclopedia - Summer Solstice.

The longest day of the year in the Northern Hemisphere is the summer solstice, on this day, the sun's rays almost directly hit the Tropic of Cancer, which is the highest latitude that the sun can reach in the Northern Hemisphere in a year, the sun runs to 90 degrees of yellow longitude (the summer solstice point), and the position that hits the ground almost directly hits the Tropic of Cancer, and the daylight hours in various parts of the Northern Hemisphere reach the longest of the year.

Because the earth's equatorial plane and the orbital plane (i.e., the ecliptic plane) have an angle, according to the different positions of the earth's revolution, the position of the sun directly on the earth is different, the spring equinox and autumn equinox direct sun point is located at the equator, the summer solstice is at the Tropic of Cancer, the winter solstice is in the northern hemisphere of the Tropic of Capricorn, the spring equinox and the autumn equinox are equal in length day and night, the summer solstice is long and the night is short, the winter solstice is short and the night is long, and the southern hemisphere is just the opposite.

The longest day of the year in the Northern Hemisphere is:Summer solsticeIt is also direct sunlightTropic of Cancerof the day.

On the summer solstice, the sun reaches the northernmost point of the year, almost directly reaching the Tropic of Capricorn, and the days in the northern hemisphere reach the longest and go further north.

Long. After the summer solstice, the sun gradually moves southward, and the days in the Northern Hemisphere get shorter and the nights get longer. The summer solstice is the northernmost day of the year, the extreme of the sun's northward travel, the longest day in the Northern Hemisphere, and the higher the latitude, the longer the day.

This is due to the fact that the "long days and short nights effect" caused by the tilt of the Earth's axis of rotation becomes more pronounced the closer to the two levels.

Summer solstice customs: Eat noodles on the summer solstice, in old Beijing.

Folk, there is a "winter solstice dumplings summer solstice noodles" said, on the day of the summer solstice, most of the people in Beijing choose to eat noodles, there are lo noodles, fried noodles, beef noodles, egg noodles, etc., it tastes unique.

When eating noodles, people like to cook the noodles with cold water for a while, and then mix them with sesame paste (or fried sauce), pepper oil, aged vinegar, cucumber shreds, etc., and then pound the garlic cloves into garlic paste, splash it up, the taste is delicious, and it can also cool down the heat.

1. The longest day of the year is the summer solstice around June 21, when the sun shines directly on the Tropic of Cancer, which is the longest day of the year in the northern hemisphere.

2. The summer solstice, also known as the summer festival in ancient times, the summer solstice festival, when the sun runs to the yellow longitude of 90 °, it is the summer solstice node, generally in the Gregorian calendar June 21 to 22.

3. On the day of the summer solstice, the position of the sun directly hitting the ground reaches the northernmost point of the year, almost directly hitting the Tropic of Cancer, so for the Tropic of Cancer and the areas north of it, the summer solstice is also the highest day in the noon sun height of the year in the liquid combustion. North of the Arctic Circle, the sun sits above the horizon all day, making it the most extensive day of the year in the Northern Hemisphere.