When does the dog days start?

The dog days begin from summer to the third watch in the future.

The dog days are divided into three days: the beginning, the middle and the end, and one * * * lasts for 30 to 40 days. Not only the number of days in dog days is uncertain, but also the starting date of several volts per year is different. In order to accurately calculate the dog days, we need to know the summer solstice and the law of branches and branches. In fact, the starting date of several volts is not based on a fixed date in the solar calendar or the lunar calendar, but is calculated by calendar method.

The summer solstice is the 10 solar term among the 24 solar terms, and the time point is between June 2 1 day and the 22nd of the Gregorian calendar every year. On this day, the sun shines directly on the Tropic of Cancer, which is the longest day in the northern hemisphere all year round. The solstice just after summer is the dog days.

Diet culture in dog days;

As the saying goes, "cold has three or nine, and heat has three volts." On the dog days, on the one hand, the ancients used cool drinks to escape the heat, on the other hand, they also held corresponding custom activities, such as "drinking to ward off evil spirits". Over time, a unique diet custom culture has been formed.

China is a vast country with different customs in different dynasties and regions. For example, the summer diet in the Northern Song Dynasty is "green purse" and "green lotus" is lotus leaf, which has the effect of clearing heat.

In the dog days in Taizhou, Zhejiang, the old people have the custom of eating chicken porridge, which is called "Buyang". In a word, the origin of the custom of "Three Dog Foods" in China is related to the "Raf Festival" written in the Han Dynasty, which was originally an activity to celebrate agriculture. This also reflects the richness of China's diet custom culture from one side.