When did you first lie down?

The first stage is from July 15 to July 24, the middle stage is from July 25 to August 13, and the last stage is from August 14 to August 23.

In addition, the dog days will also appear in the hot summer and the hot summer, that is, the days with the highest temperature and humid heat in a year. The so-called "dog days" refers to the "dog days" of the lunar calendar, which is the hottest period of the year. It can be understood as "squatting" means that the weather is too hot to move.

The almanac stipulates that "the number of volts starts from the third day of summer", that is to say, "it starts to count down from summer" and begins to fall on the third "Geng Day".

Therefore, the first day of 20 19 is July 12 (Geng xuri). Because the initial stay is 10 days, the initial stay on 20 19 is from July of 12 to July of 2 1 year.

After the summer solstice, although the days are getting shorter and the nights are getting longer, the days are longer than the nights in a day. Every day, the ground absorbs more heat than it emits, and the temperature near the ground is getting higher every day.

During the "three volts" period, the ground absorbs almost more heat than it emits, and the weather is the hottest. After that, the heat absorbed by the ground began to be less than the heat emitted by the ground, and the temperature gradually decreased.

Therefore, the hottest time of the year generally appears in the "three volts" from summer to Sunday, and the lodging date is always between July 1 1 and July 2 1.