When is the Rain Water solar term? Is it calculated according to the Gregorian calendar or the lunar calendar?
There are 24 solar terms, 4 seasons and 365 days in a year. The second solar term is Rain Water. When is the Rain Water solar term? Is it calculated according to the Gregorian calendar or the lunar calendar? When the first month of the lunar year arrives, every household is filled with joy. What are the customs of the first month of the lunar year? What other festivals are there besides the first day of the Spring Festival? Just check out the 2020 New Year special topic on Shuimoxiansheng.com and you will know!When is the Rain Water solar term?——Rain Water solar term belongs to the spring solar term:Spring season time: (1) Beginning of Spring: The handle of the Big Dipper points to Yin. The qi-fixing method: the sun’s ecliptic longitude is 315 degrees. The festival falls on February 3rd to 5th in the Gregorian calendar. (2) Rain Water: The Big Dipper points to Ren; the sun’s ecliptic longitude is 330°. The festival falls on February 18th to 20th of the Gregorian calendar. (3) Jingzhe: The Big Dipper points to Ding; the sun’s ecliptic longitude is 345°. The festival falls on March 5th to 7th of the Gregorian calendar. (4) Spring Equinox: The Big Dipper points to Ren; the sun’s ecliptic longitude is 0°. The festival falls on March 20-22 of the Gregorian calendar. (5) Qingming: The direction of the handle of the Big Dipper: the Big Dipper points to Yi; the time averaging method: 105 days after the winter solstice; the method of determining the qi: the sun’s ecliptic longitude is 15°. The festival falls on April 4th to 6th of the Gregorian calendar. (6) Grain Rain: The Big Dipper points to Chen; the sun’s ecliptic longitude is 30°. The festival is from April 19 to 21 in the Gregorian calendar ——Introduction to the Rain Water solar term: The Rain Water solar term marks the beginning of rainfall and the gradual increase in rainfall. Rainwater, like Grain Rain, Grain Full, Light Snow and Heavy Snow, is a solar term that reflects precipitation phenomena and is a reflection of the ancient farming culture on the festivals. As we enter the Rain Water solar term, the cold weather in northern my country has not yet ended, and it is still snowing in some places. It is still very cold as it has not yet entered spring. However, in most parts of the south, spring is in the air, and it is a scene of early spring. According to the Gregorian calendar or the lunar calendar?——The dates of the solar terms are calculated according to the Gregorian calendar.Calculation of Rain Water solar term date: Formula: [Y*D+C]-L Formula interpretation: multiply the last two digits of the year by 0.2422, add 18.74, round up to an integer, and subtract the number of leap years in this century, round up to an integer. The C value of rainwater in the 21st century is 18.73. For example: The rainy date in 2008 = [8×0.2422+18.74]-[(8-1)/4]=20-1=19, which means it rained on February 19th. Exception: The calculated rainy day in 2026 should be reduced by one day to 18th. ——Division of 24 solar terms: The division of the 24 solar terms has gone through different division methods in different periods, such as the handle direction method, average time method, and fixed qi method. The current "qi-fixing method" and the ancient "dipper handle pointing method" are different in their determination methods. Although the determination methods are different, the astronomical phenomena indicated by the two are consistent. For example, according to the dipper handle pointing method, the summer solstice is when the dipper points due south, and the sun is directly above the Tropic of Cancer. At the intersection of the solar terms, it is the day with the longest day and the shortest night in the year in the northern hemisphere, so the day when the sun is directly above the Tropic of Cancer is also called the "longest day." The "Dingqi Method" takes one period of the Earth's revolution around the sun as a cycle. The summer solstice is when the sun reaches 90° of the ecliptic longitude. At the time of the solar term, the sun is directly above the Tropic of Cancer, and the daytime in the Northern Hemisphere is the longest. |
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