The difference between dog days and Huangmei rainy days
2. The weather conditions are different: the main weather conditions in dog days are hot, while the weather conditions in Huang Meiyu are continuous rain in Mao Mao.
Huangmeitian is a unique season in the south of the Yangtze River. At this time, the plums are ripe, so they are called "Huangmeitian". The main manifestations of Huangmeitian are high air humidity, high temperature, changeable weather and easy mildew of clothes, so some people call the rain in this period "mildew rain".
The dog days are also based on the traditional dry and dry days. Starting from the summer solstice, the third Geng Day is the beginning, the fourth Geng Day is the middle, and the first Geng Day after beginning of autumn is the end. When there are four Geng days between the summer solstice and the beginning of autumn, the middle part is ten days, and if there are five Geng days, it is twenty days. So some years the dog days are 30 days, and some years are 40 days.
According to tradition, the mango seeds will be moldy on the first day after planting, and will not be moldy on the first day after the hot summer. Therefore, plum blossoms are always between June 6th and 15, and plum blossoms are always between July 8th and 19. There is also a folk saying that "it thunders in summer and plum blossoms fall on July 49". At this time, the date of plum blossom will be postponed to August. Huangmeitian refers to this special time period, not to rainy days. In recent years, Huangmei released by the Meteorological Observatory has been short for a few days, which is different from Huangmeitian in the traditional sense.
At present, the meteorological Huangmeitian refers to the adjustment date of the plum circulation in and out of the Yangtze-Huaihe River basin during the turning point of spring and summer seasons in East Asia, and then the plum period is divided in detail in combination with the large-scale precipitation phenomenon. So as short as a few days, there will even be "empty plums" and as long as a few days.
Dry branch day: dry branch day, press "? A, B, C, D, E, G, N, N are arranged in turn, and are circulated once every ten days. The earthly branches are arranged in the order of "Zichou Mao Yinchen has arrived in Shen You at noon", which circulates once every 12 days. Every day, there is a heavenly stem and a earthly branch arranged in pairs, so a * * * has 60 combinations, so the calendar year with branches is once every 60 days, and the calendar year with branches is once every 60 years.