How many days are there in a year 7 15?

A year is 365 days, 6 hours, 9 minutes and 9.5 seconds, about 365.243 days.

Generally speaking, there are 365 days in a normal year and 366 days in a leap year. According to the ancient calendar of China, there are 24 solar terms, 12 festivals and 12 atmospheres in a year starting from beginning of spring.

The local annual time is divided into twelve parts according to the determined time in summer (365.243 is divided into twelve parts).

The time per month is one twelfth of 365.243. According to the monthly calendar, the moon revolves around the earth for one month, and the time for the moon to revolve around the earth is 27 days, 7 hours and 43 minutes, 1 1.5 1 sec.