What day is July 31st?

July 31, 2023 is the 11th day of the Zhongfu.

There are 40 days in the dog days of 2023. The first dog day is 10 days; the middle day is 20 days; and the last day is 10 days. The start and end time of Chufu: July 11, 2023 to July 20, 2023, ***10 days.

The start and end time of the middle period: July 21, 2023 to August 9, 2023, ***20 days; the start and end time of the last period: August 10, 2023 to August 19, 2023, ***10 days.

The number of days in the dog days is not fixed. The first and last days of the dog days are fixed at 10 days. Only the time of the middle dog days is not fixed. In some years, it is 10 days, and in other years, it is 20 days. The time of Zhongfu is determined by the number of Geng days between the summer solstice and the beginning of autumn. If there are four Geng days between the Summer Solstice and the Beginning of Autumn, the Zhongfu period lasts for 10 days. If there are five Geng days between the Summer Solstice and the Beginning of Autumn, the Zhongyu period lasts for 20 days.

Weather characteristics of the Dog Days

The Dog Days are the hottest, humid and muggy period of the year. The air humidity increases after "fall". The reason for the high humidity in Dog Days is that the southeast wind blows in Dog Days, and the southeast is the ocean, so the air is moist. The humidity of the sea breeze causes high humidity in Dog Days.

The "high temperature and high humidity" in the dog days of summer are the climate characteristics of southern my country. The northern inland area is far from the ocean, and its climate is characterized by "high temperature and dryness".

Both "three volts" and "three summers" represent extreme high-temperature weather. The curves on the time axis and the temperature axis are basically the same: when the summer days come, the summer days come; when the summer days disappear, the summer days are about to end. The reason why the ancients called the extremely hot days of the year "summer" and also found the word "volt" to accompany it is that in addition to the cultural meaning, another important purpose is for health reasons.