How is the summer solstice calculated? Introduction to the calculation method of the summer solstice
The summer solstice is the tenth solar term among the twenty-four solar terms. So, let’s take a look at how the summer solstice is calculated. An introduction to the calculation method of the summer solstice. Pomegranate flowers are in full bloom in May of the lunar calendar. Han Yu has a poem that says "The pomegranate flowers in May are bright to the eyes". If you want to know more about May of the lunar calendar in 2021, please pay attention to Mr. Shui Mo's special topic on May of the lunar calendar!How is the summer solstice calculated? Introduction to the calculation method of the summer solsticeThe calculation of the summer solstice is done in a way to infer the date of birth. The method for calculating the summer solstice is as follows:Calculation of the summer solstice date [Y*D+C]-L Formula interpretation: Y=last two digits of the year, D=0.2422, L=leap year number, 21st century C=21.37, 20th century=22.20. For example: The summer solstice date in 2088 = [88×.0.2422+21.37]-[88/4]=42-22=20, and the summer solstice is on June 20. Exception: For the year 1928, add one day to the result. When it comes to the summer solstice, the sun's direct point reaches the Tropic of Cancer, which is the northernmost place. The day of summer solstice. In the Beijing area, the daylight duration is about 15 hours. The Northern Hemisphere receives the most sunlight on this day, nearly twice as much as the Southern Hemisphere. It is the day with the longest daylight and the shortest night in the entire summer, usually on June 21-22. Origin of Summer SolsticeThe so-called summer solstice is the most confirmed solar term among the 24 solar terms by the ancients.The summer solstice was also called "Summer Festival" or "Summer Solstice Festival" in ancient times. The time of the summer solstice was actually determined in the seventh century BC. In the seventh century BC, our ancestors used a gnomon to measure the sun's shadow and determined the summer solstice. The summer solstice is the earliest solar term to be determined among the 24 solar terms. The summer solstice begins on June 21st (or 22nd) every year and ends on July 7th (or 8th). According to the "Kezunxiandu Manuscript": "When the sun reaches the north, the day is at its longest, and the shadow is at its shortest, so it is called the Summer Solstice. 'Zhi' means the extreme." The name Summer Solstice comes from this. |
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