How do you get the time of each of the 24 seasons? Teach me, thank you!

Twenty-four solar terms, a supplementary calendar to guide farming in ancient China, were formed in the Spring and Autumn Period and the Warring States Period. Because the lunar calendar in China is a kind of "yin and yang calendar", which is based on the movement of the sun and the moon, it can't fully reflect the solar cycle. However, China is an agricultural society, and agriculture needs a strict understanding of the movement of the sun, so farming is entirely based on the sun, so the "twenty-four solar terms" that reflect the solar cycle alone are added to the calendar.

Therefore, the Gregorian calendar based on the 24 solar terms was originally calculated on the date of the month. The Gregorian calendar we use is calculated by the sun. The Gregorian calendar has 0.25 days more each year, so there is a leap year every four years. So the difference between the 24 solar terms and the Gregorian calendar is basically about two days. If four years is regarded as a reincarnation of the gap between these two days, then every year will be moved back by half a day, so the year just after leap year will be moved by half a day, so it is still on the same day as the twenty-four solar terms of leap year.

General formula of longevity -[y× d+c]-l

Y= year, D=0.2422, L= leap year, and C depends on solar terms and year.

In this century, the C value of beginning of spring is 4.475, and the beginning of spring date of 20 17 is as follows:

[20 17×0.2422+4.475]-[20 17/4- 15]=492-489=3

So the beginning of spring date of 20 17 is February 3rd.

Through this formula, you can find that the difference between leap year and next year is less than one day, and leap year is divisible, which further shows that the days of these two years are basically the same. It must be one day.

C value depends on the year and solar terms, so you need to look up the C value table. In fact, the twenty-four solar terms are the solar calendar, which is of course similar to the Gregorian calendar. The twenty-four solar terms are more accurate, which sometimes leads to a difference of about 1 day.

Even if the value of c is unknown, it is possible to calculate the position. Always eliminated in the end. There are two C's every year, and the comparison can completely eliminate his influence.