How is the exact time of the Beginning of Autumn calculated? What is the origin of the beginning of autumn?
The Beginning of Autumn is the seventh month of the twenty-four solar terms. So how do we know when it is? How is the exact time of the Beginning of Autumn calculated? Autumn is divided into early autumn, mid-autumn and late autumn according to the time period. The seventh month of the lunar calendar is early autumn, and the Beginning of Autumn and End of Heat in the 24 solar terms are in the seventh month of the lunar calendar. You can also learn more about the seventh lunar month of 2019 on Shuimoxiansheng.com! Come and pay attention!How is the exact time of the Beginning of Autumn calculated?Date calculation[Y*D+C]-L Formula interpretation: Y=last two digits of the year, D=0.2422, L=number of leap years, C=7.5 in the 21st century and 8.35 in the 20th century . For example: The date of the beginning of autumn in 2088 = [88×0.2422+7.5]-[88/4]=28-22=6, so August 6 is the beginning of autumn. Exception: For 2002, add 1 day to the result. The Origin of Beginning of AutumnThe beginning of autumn occurs on August 7 or 8 every year when the sun reaches 135° of the ecliptic longitude. The "Li" in Li Qiu means beginning, and "Qiu" refers to the period when crops mature. The Beginning of Autumn marks the end of summer and the beginning of cool autumn. It is a solar term that reflects the seasons.According to the Collection of Explanations of the 72 Seasonal Changes in the Lunar Calendar: "Autumn means to pull, and things are pulled together during this period." The Beginning of Autumn not only indicates that the hot summer is about to pass, but also that autumn is about to come. It also means that the plants are beginning to bear fruit and the harvest season has arrived. The ancients regarded the Beginning of Autumn as an important moment between summer and autumn and always attached great importance to this solar term. |
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