Is there a 30th day in the tenth lunar month of the Xinchou year 2021? How to judge?
Although there are 12 months in a year, the number of days in each month in the Gregorian calendar is fixed, but that is not the case in the lunar calendar. So, is there a 30th day in the tenth month of the lunar year of Xinchou 2021? How to judge? 2021 is the Year of Xin Chou. In the tenth month of the lunar calendar in 2021, the good and bad days of each day are different. If you want to know more about the tenth month of the lunar calendar in 2021, you can click on Mr. Shui Mo’s special topic on the tenth month of the lunar calendar in 2021 to check it out!Is there a 30th day in the tenth lunar month of the Xinchou year 2021?The tenth month of the lunar calendar in 2021 does not have thirty days, but only twenty-nine days.Specific time of October in the lunar calendar 2021: November 5, 2021 in the Gregorian calendar, the first day of October in the lunar year of 2021 - December 3, 2021 in the Gregorian calendar, the twenty-ninth day of October in the lunar year of 2021. Why do lunar months have different numbers of days?The lunar calendar (a combined lunar and solar calendar), also known as the Xia calendar, is a calendar that harmonizes the orbital cycles of the sun, earth, and moon.It requires that the calendar month be basically consistent with the synodic month, and that the calendar year be basically consistent with the tropical year. It is a calendar that combines the advantages of the lunar and solar calendars and reconciles the contradictions between the lunar and solar calendars. Therefore, it is called the lunar and solar calendar. The various calendars in ancient my country and the lunar calendar used today are all this kind of lunar-yin calendar. The Xia calendar uses the Heavenly Stems and Earthly Branches to record years, and the cycle repeats every sixty years. Years are divided into ordinary years and leap years. There are twelve months in a normal year; there are twelve normal months plus one leap month in a leap year, for a total of thirteen months. Months are divided into long months and short months. Long months have thirty days, and short months have twenty-nine days. Which month is bigger and which is smaller in a year is different every year and is determined by calculation. A normal year has 354 to 355 days, and a leap year has 383 to 384 days. Since the number of days in an ordinary year is about eleven days less than that in a solar year, the leap year (that is, twelve ordinary months plus one leap month) is used to make the average number of days in these years as close to 365.2422 days as possible. Since 1 tropical year is 12.368 synodic months, 368/1000=46/125, so there should be 46 leap years in 125 years. However, because setting the leap year in this way is too complicated, it is calculated that 7/19 is closest to 0.368. Therefore, generally, there are 7 leap months in 19 years, and the years with leap months have 383 or 384 days in total. How to judge?In addition to checking the lunar calendar date, you can also infer it using the above method. |
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