The formula of three volts is jingle.

The three-volt formula is jingle: the head is hot as fire, the middle is hot as pot, the tail is not hot, and the three volts are infinite.

This jingle vividly describes the growing heat in dog days. The head is as hot as fire, the middle is as hot as hot pot, and the tail is extremely hot. It describes the continuous heat in summer. Please note that this is just an interesting memory formula, not a scientific discussion. Three-volt weather refers to the high-temperature weather period in China, which is generally divided into three sections: the head, the middle and the tail, and each section lasts about 10 days.

Meteorological features: Sanfu is the summer solar term among the traditional 24 solar terms in China, which is usually divided into head, middle and tail. Head-lying usually occurs from summer to the next 10 day, middle-lying occurs from summer to the next 20 days, and tail-lying occurs from summer to the next 30 days. During this period, the temperature is high, the weather is hot, rainy and windy. In this hot period, people will pay attention to health, avoid long-term exposure to the scorching sun, pay attention to reasonable hydration and heatstroke prevention and cooling.

Folk customs include eating cold dishes, drinking herbal tea, taking a bath and wearing cold clothes to help the body cope with hot weather. Folklore: In some places, people will pray for well-being and avoid evil spirits through some folk customs. For example, during this period, people will stick a dog-day sticker on the door or the corner of the room, which is said to ward off evil spirits and avoid disasters. There are also traditional customs such as eating melons, July and a half, and activities such as avoiding marriage.

When is the dog days?

The dog days refer to a period of summer in China, usually after the summer solstice. The specific schedule depends on the lunar calendar, so the date will be different every year. Generally speaking, the head, middle and tail last about 10 days respectively, and a * * * forms a dog days cycle of 30 days.

The dog days in 2023 are as follows: beginning: August 20231-August 10, middle: August 20231-August 20, 2023, ending: August 2, 2023/KLOC-0.