When is 202 1 3949? When is 202 1 3949?

Everyone knows the twenty-four solar terms, so do you know the dog days and the three or nine days in the solar terms? These two are the hottest and coldest stages of the year, of which March 9 is one of the nine days, and northerners come for nine days in winter. So, when is 202 1 3949? When is 202 1 3949? Come and get to know me.

202 1 time: 202165438+1October 8th-202165438+1October 6th.

2021April 9th Time: 202117-2021125.

2021March 9 timetable

Day 1: 202 1 1.8

The next day: 202 1 1 9.

Day 3: 202 1 1 10.

Day 4: 202111.

Day 5: 202 1 1 12.

Day 6: 202 1 1 13.

Day 7: 202 1 1 14.

Day 8: 202 1 1 15.

Day 9: 202 1 1 16.

202 1 49 timetable

Day 1: 202 1 1 17.

The next day: 202 1 1 18.

Day 3: 202 1 1 19.

Day 4: 202165438+1October 20th (severe cold)

Day 5: 202 1 65438+1February 21.

Day 6: 202165438+1October 22nd.

Day 7: 202165438+1October 23rd.

Day 8: 202165438+1October 24th.

Day 9: 202165438+1October 25th.

Why is 3949 the coldest?

In winter, the sun shines directly on the tropic of Capricorn, and the oblique angle between the tropic of Capricorn and the northern hemisphere is the largest, with the shortest day and the longest night in the northern hemisphere. During the day, the ground absorbs the least amount of solar heat, but emits the most at night, so the heat on the ground "can't make ends meet". Although the temperature dropped rapidly during this period, it was compensated by the accumulated heat in summer and autumn, so the temperature did not drop very low and the weather was not very cold.

By the middle and late period of Gregorian calendar 1, during March 9 and April 9, the original accumulated heat on the ground had been exhausted, and little heat was absorbed from the sun during the day, but much heat was lost at night. In this increasingly "unable to make ends meet" situation, the temperature drops faster, and the strong cold air from Siberia and Mongolia Plateau keeps invading, which makes the temperature drop sharply, and the lowest temperature and weather often appear all year round.

Is it cold in March or April?

Generally speaking, March 9 is cold, which is the third nine days from winter to the future and the coldest day of the nine days.

However, due to regional differences, the coldest time in the north and south is different. It is cold in the north on March 9th and in the south on April 9th.

Sanjiutian health custom

Wear: Wearing a cotton-padded hat in winter is like wearing a cotton-padded jacket.

In cold winter, when people put on thick clothes, heat is mainly lost from exposed parts such as head and hands. People who don't wear hats at rest lose a lot of heat from their heads. When the ambient temperature is 15℃, the heat lost by the head accounts for 30% of the total heat dissipation of human body, 60% at 4℃ and 75% at-15℃. It can be seen that the warmth of the head is closely related to the thermal balance of the human body.

Eat: make up for one winter in September, and it won't hurt in the coming year.

Winter is the season when vitality lurks and the sun hides, and it is the best time to maintain and accumulate energy. It is necessary to pay attention to the way of Tibetan cultivation and tonic in time, which can not only increase nutrition, but also dispel cold and strengthen the body.

Tip: "Practice Sanjiu in Winter" indoor jogging

People are weak in the yang for three or nine days, and the burden of heart and lung is not small. Therefore, middle-aged and elderly people should not go out in the coldest time. Just do some simple exercises at home, such as jogging indoors and doing gymnastics. If the temperature rises, you can choose outdoor sports according to your personal situation. The best time is from 3 pm to 4 pm, but don't go out on cloudy days, snowy days, strong winds and foggy days.

Nursing: Soak your feet and rub your hands in cold weather.

Remember to soak your feet in hot water for three or nine days before going to bed, which can not only dispel the cold and eliminate fatigue at work, but also promote sleep and have a good sleep! It is good for your health to form the habit of rubbing your hands. First, you can exercise your fingers, make them more flexible and free, and have a certain health care effect on your brain; Second, it can promote hand blood circulation and prevent frostbite; Third, people who work indoors often rub their hands, which can promote blood circulation and metabolism and prevent colds.