When does the volt start and is the date fixed each year?

"Three dogs" is the name of the hottest time period of summer handed down in ancient China, which is divided into "the beginning of the volt", "the middle volt" and "the end of the volt", for a period of 21 days. The time of "three dog days" adopts the lunar calendar, and its specific date is represented by the ancient Ganzhi date method in China. "Three dogs" to the summer solstice as the boundary - now the summer solstice is usually around June 22 of the solar calendar every year (in different years, the summer solstice date varies by up to one or two days), the first Geng day after the summer solstice (Geng day has a total of Gengzi, Gengyin, Gengchen, Gengwu, Gengshen, Gengshu and other 6, any one of which is called "Geng day") is the "first volt", the second Geng day is the "middle volt", and the third Geng day is the "last day".

If the "first volt" is Gengzi day, then the "middle volt" is Gengyin day, and the "last volt" is Gengchen day - the calculation method first looks at what day "Chufu" is Geng, and then pushes back in the order of 6 earth branches, Yin, Chen, Wu, Shen, and Shu, and you can get what day Geng is in the last two volts.

In China's method of chronology, month, day, and hour, because the heavenly stems have 10 such as "A, B, C, D, E, G, G, XIN, NON, and Gui", but the earthly branches have 12 such as "Zi, Chou, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Shu, Hai", etc., and the 5 heavenly stems located in the odd position are combined with the 6 earthly branches that are also located in the odd position to become 30 numbers; The 5 stems in the even-numbered position are combined with the 6 earthly branches that are also in the even-numbered position, and they also become 30 numbers; The sum of the two is 60 - the method of the year, month, day, and hour of the Ganzhi is to cycle every 60, which is called "sixty Jia" (for example, the first and 61st years are Jiazi).

In order to make the stem and branch of the day exactly the same, it is necessary to spend 60 days; But if only the heavenly stem is the same but the earthly branch is different, there is only 10 days apart. So, after the summer solstice.

Between the first, second and third Geng days, the interval is 10 days, and there are 21 days at the beginning and end of the "dog days".

When did the number of volts start in 2017?

In 2017, it started on July 12 (summer solstice Sangeng entered the ambush), and the middle volt began on July 22 and ended on August 10, with 20 days in the middle and a total of 40 days in the dog days, and the ambush on August 21.

July 12, 2017 (Gengzi Day) July 21, 2017 is the first 10

July 22, 2017 (Gengxu Day) August 10, 2017 is the middle of the 20th

Day August 11, 2017 (Geng Wu Day).

August 20, 2017.

It is the last 10 days.

In 2021, from July 11, the sail began to sail for several times, and there were three dogs in total. The Empty Clan.

One volt: July 11, 2021 - July 20, 2021, a total of 10 days;

20 days: July 21, 2021 - August 9, 2021;

Dog days: August 10, 2021 - August 19, 2021, a total of 10 days.

The volts begin on the 11th day after the summer solstice.

Ambush refers to the meaning of entering the three dogs, as the saying goes, "the summer solstice three Geng will count the volts", that is to say, the number of volts is counted from the summer solstice, and the third "Geng day" is counted into the first volt, that is, the first day of the ambush is also from the 11th day after the summer solstice. In 2023, the third "Geng day" counted after the summer solstice is July 11, which means that this day is the time of ambush.

Summer is the hottest season of the year, and the dog days are the high temperature periods of summer, which refers to the time of the two solar terms between the sun reaching the ecliptic longitude and 125°, which are the beginning, middle and last days. Since the dog days vary slightly from year to year, the calculation of the date of the incubation is based on the date of the summer solstice. The summer solstice is the day when the sun reaches 90° of the ecliptic longitude, usually around June 21 in the Gregorian calendar.

The date of ambush is the 11th day after the summer solstice.

Precautions for ambushing

1. Pay attention to heatstroke prevention and cooling. The high temperature on Futian days can easily lead to heat stroke and other heat-related health problems. We should avoid prolonged exposure to the sun, choose shady places as much as possible, and avoid strenuous exercise and outdoor activities, especially in the hot afternoon.

2. Arrange your diet reasonably. The temperature is high, and the human body is prone to sweating, which can easily lead to dehydration. Therefore, we should drink plenty of water, especially cool drinks and moderate amounts of salt to replenish the water and electrolytes lost in the body.

3. Pay attention to protective measures. Futian is a period of high incidence of disease transmission, especially mosquitoes and infectious diseases. We need to do a good job of preventing mosquito bites, using mosquito coils, mosquito nets and mosquito repellent liquids to avoid mosquito bites.

In addition, it is necessary to pay attention to personal hygiene, wash hands frequently, and keep the indoor and outdoor environment clean and hygienic.

The above content reference: Encyclopedia - Ambush.

The time of ambush is not fixed every year, generally starting from the summer heat, and every ten days is one volt.

The number of volts generally refers to the number of volts, and some places are also called several volts. It is said that the north enters the hottest time of summer, which generally starts from the small heat, and is one volt every ten days, a total of three dogs.

Start and end times. Starting from the summer solstice, according to the arrangement of the dry and branch days, the third Geng day is the first day. The fourth Geng day is the middle volt, and the first Geng day after the beginning of autumn is the last volt.

The word "庚" on Geng Day is the seventh character in the ten days of "A, B, C, D, E, G, G, XIN, NON, and 癸", and is repeated every ten days.

Incubation time

The time of the ambush is not fixed every year, the length of the ambush is not the same, you need to check the Zheng almanac to calculate, you can simply use the "summer solstice three Geng" these 4 words formula to indicate the date of the ambush, that is, from the third "Geng" day after the summer solstice, the initial volcanic is 10 days, the middle volcanic is 10 days or 20 days, and the end is 10 days. In ancient China, the "Stem Branch Chronology Method" was popular, and 60 different names were used to record the days with 10 heavenly stems and 12 earthly branches, and they were used in cycles.

Every day with the word Geng is called Geng Day. The character "庚" on the day of Geng is the 7th character of the 10 heavenly stems of "A, B, C, D, E, G, G, G, XIN, NON, and 癸", and is repeated every 10 days. Starting from the summer solstice, according to the arrangement of the Ganzhi period, the 3rd Geng day is the first volt, the 4th Geng day is the middle volcane, and the first Geng day after the beginning of autumn is the last volcane.

When there are 4 Geng days between the summer solstice and the beginning of autumn, it is 10 days in the middle of the volt, and 20 days when there are 5 Geng days. It seems that the morning and evening of Geng will appear in the shadow of the length of this belt, so there are 30 days in some years and 40 days in some years.

The above content refers to Encyclopedia - Countvolts.

Encyclopedia - Dog days.

In some places, it is also called Lufu several volts. It is said that the north enters the hottest time of summer, generally starting from the small heat, every ten days for one volt, a total of three dog days, so the Fu day is also called the dog day. The time of the start and end of the canopy starts from the summer solstice, according to the arrangement of the dry and branch days, and the third Geng day is the first volt.

The fourth Geng day is the middle volt, and the first Geng day after the beginning of autumn is the last volt. The word "庚" on Geng Day is the seventh character in the ten days of "A, B, C, D, E, G, G, XIN, NON, and 癸", and is repeated every ten days. Summer Solstice Ninety-Nine Song "Nine" in the Chinese lunar calendar is a customary miscellaneous festival, there are "Winter Ninety-nine" and "Summer Ninety-nine".

Among them, the lack of noise is "Winter Ninety-Nine" is more widespread, it is based on the winter solstice as the starting point, every nine days for a nine, a total of eighty-one days of nine nines a year. Three.

September and April 9 are the coldest seasons of the year. "Summer ninety-nine" is based on the summer solstice as the starting point, every nine days for nineteen, a total of eighty-one days of nine nines per year. Again, three.

September and April 9 are the hottest seasons of the year. It is in stark contrast to "Winter Ninety-Nine", unfortunately it is not widely circulated, in fact, "Summer Ninety-Nine" does vividly reflect the relationship between date and phenology. For example, the most reflective of the climatic characteristics of most parts of our country is the recent "Summer Solstice Ninety-Nine Song" on the elm beam in the main hall of a Yuwang Temple in Laohe City, Hubei Province, the full text of which is:

On the first nine days of the summer solstice, the feather fan is held in the hand; Nineteen and eighteen, stripped of the crown; Three-nine-twenty-seven, sweating when you go out; 4936, swept the open-air accommodation; Five-nine-forty-five, the hot autumn is like a tiger; Six-nine-fifty-four, take the cool to enter the temple; Seventy-nine sixty-three, touching the sheets at the head of the bed;