How many days are there in a year?

There are 10 days in a year, and one volt refers to the period from summer to the third Geng day in the future, that is, the first day of three volts, which usually refers to the period from summer to the third Geng day in the future to the day before the fourth Geng day.

The dog days are the initial, middle and final days, and they are the hottest season in a year. The dog days appear in the Gregorian calendar from mid-July to mid-August every year, and its climatic characteristics are high temperature, low pressure, high humidity and low wind speed.