We all know that dog days are the hottest time of the year, so what does dog days mean? When will dog days start in 2019? Let's learn about it!
What does dog days mean
The dog days are the hottest time of the year. In the middle of the light heat and the heat treatment, the dog days and nights are short and the days are long. The sun is nearly direct. The dog days are divided into the first, the middle and the last. The dog days also have the meaning of summer.
Dog days, which appear between light heat and summer heat, are the highest, humid and muggy days in a year. The "Fu" of "dog days" refers to the "Fu evil", which is the summer evil among the so-called "six evils".
Dog days appear in the heat and summer, is the highest temperature of the year and humid, muggy days. The so-called 'dog days' refer to the' dog days' in the lunar calendar, which is the hottest period of the year. It can be understood in this way: "Fu" means that the weather is too hot to move. But the reason why the dog days are called "dog days" is that there are also many cold factors. Sanfu is the hottest 30 or 40 days of a year in the Central Plains. It is calculated according to the lunar calendar, and it is between the middle and late July and the early August of the solar calendar.
Volt, divided into early, middle and late, called three volts. The dog days are the hottest period of the year, because the days are getting longer and the nights are getting shorter, and the sunlight is getting close to direct. But the summer solstice is not the hottest time, because the heat absorbed by the ground at this time, and at night, it emits a large part. However, it absorbs more heat and dissipates less heat every day. As a result, it gets hotter and hotter day by day. In about 20 days, it will be the hottest when it comes to the third volt.
The date of Sanfu is from the date after the summer solstice to the third day of Geng, which is the first ambush, the fourth day to the fifth day of Geng is the middle ambush, and the first day to the second day of Geng after the beginning of autumn is the last ambush. There are four days between the summer solstice and the beginning of autumn, and the median is 10 days. There are five days, and the median is 20 days.
Fu is a summer resort. From the summer solstice, the days begin to get shorter and the nights begin to get longer. There are cold factors lurking in the middle of the heat. It is very scientific to name it 'Fu' at the beginning.
When will the dog days begin in 2019
The beginning is July 12, 2019.
There is a saying that "three gengs count the first ambush on the summer solstice", which means that from the beginning of the summer solstice, the third Geng day is the time to enter the first ambush, that is, the time to enter the first ambush. The whole dog days began on the third day after the summer solstice and ended on the first day after the beginning of autumn, lasting 30 to 40 days.
According to the law of Chinese lunar (lunar) climate, predecessors have long stipulated that 'the third day after the summer solstice is the first ambush (the first ambush), the fourth day is the second ambush (the second ambush), the first day after the beginning of autumn is the last ambush (the third ambush), the first and the last ambush are 10 days, the middle ambush is 10 days or 20 days, and the third ambush is 30 days or 40 days.
The specific date of Sanfu is decided by the date of the solar term and the date of ganzhiji. According to the traditional calculation method in China, the time of ambush is not fixed every year, and the length of the ambush is not the same. We need to look up the almanac to calculate it. We can simply use the four word formula "three Geng" to indicate the date of the ambush. The third and fourth Geng days after the summer solstice are the beginning date of the first ambush (the first one) and the middle one (the second one), and the first Geng day after the beginning of autumn is the last one (the third one) My first day. The so-called day of Geng refers to the day when the heavenly stem of the lunar calendar is Geng. There are six kinds of days: gengzi, Geng Yin, Geng Chen, Geng Wu, Geng Shen, Geng Shu. They take turns every ten days in turn (that is, the six days of the sixty Jiazi).
Because the third and fourth days of the Geng are the first days of the first and the middle days of the fall, and there are 10 days between each day, so the time of the first fall is 10 days, and the last fall is also 10 days. The period of ambush varies from 10 days to 20 days. The third day after the summer solstice (the first ambush) appears sooner or later, so the days of the middle ambush are not the same, so there is a difference of 30 days in some years and 40 days in some years.