The number of days in the lunar calendar is calculated in this way, and how is the number of days in

The length of the calendar month of the lunar calendar is based on the synodic month, with the big month having 30 days and the small month having 29 days, and the big month and the small month make up for each other, so that the average length of the calendar month is close to the synodic month. The lunar calendar permanently regards the day of the new year as the first day of the month, the first day of the new month. The so-called "Shuo", astronomically speaking, it has a definite moment, that is, the moment when the lunar longitude and the solar yellow longitude are the same.

The calculation of the ecliptic longitude of the sun and the moon is very cumbersome and complicated, so I will not introduce it here) As for the basis for determining the names of the months in the lunar calendar, it is determined by the "Zhongqi". That is, the month containing "rain" is January; February is the month containing the "vernal equinox"; The month containing "valley rain" is March; April is the month with "Xiaoman"; The month containing the "summer solstice" is May; The month containing the "Great Heat" is June; The month with "heat" is July; The month containing the "autumn equinox" is August; The month with "frost" is September; October is the month with "light snow"; The month containing the "winter solstice" is November; December is the month with the "Great Cold". (The month that does not contain the mid-air is used as the leap month of the previous month) The length of the calendar year of the lunar calendar is based on the return year, but a return year is more than the number of days of the 12 synodic months, and shorter than the 13 synodic months, when the ancient astronomers compiled the lunar calendar, in order to make any day of the month contain the meaning of the moon phase, that is, the first day of the first month is a moonless night, and about fifteen are full moons, so the synodic months are the mainstay, and at the same time take into account the seasons, the method of seven leaps in 19 years is adopted

In the nineteenth year of the lunar calendar, there are 12 common years, each with 12 months; There are seven leap years, each with thirteen months.

Just take the 10,000-year calendar and count it.

The steps of the lunar calendar algorithm are as follows:

The calculation is based on Beijing time, and the lunar day on which the new day is located is the first day of the lunar month. China's lunar calendar emphasizes the calculation of each year and month by month, and only after the month-by-month calculation can we know whether a certain month of a certain year is a big month or a small month; After calculating from year to year, it is possible to know whether a certain year is a leap year or a common year.

The lunar calendar is basically 12 months as a year, but the time of the 12 synodic months is a day, and the return year is about 11 days apart, so that every 3 years there will be 33 more days, that is, more than a month, in order to eliminate the extra days, every 3 years to add a month, this is the leap month of the lunar calendar.

The order of the day is determined by the phases of the moon. That is, the date and time of the conjunction of the sun and the moon are used to determine the first day of the month. For example, if 6:05 a.m. is the conjunction of the sun and the moon, then today is the first day of the new year.

If the second conjunction falls on the 30th day, then the month is a minor month (29 days); If it falls on the 31st day, then the month is the Great Moon (30 days).

The order of the month is determined by the middle air. China's old calendar divides the year into 24 solar terms, of which the singular number is called the solar term, and the even number is called the middle air. The month in which the rain is located is the first month; February is defined as the month in which the vernal equinox falls; And so on.

The origin of the lunar calendar:

The lunar calendar, China's current modern calendar, belongs to the lunisolar calendar, that is, the lunar calendar and the solar calendar, is based on the change cycle of the moon phase, each moon phase synodic change to one month, referring to the solar return year for the length of one year, and add 24 solar terms and set leap months to make the average calendar year and the return year adapt.

The lunar calendar fuses the lunar calendar and the solar calendar to form a lunisolar calendar, which was called the summer calendar in ancient times because of the use of "Xia Zheng". The lunar calendar is a new calendar used after 1970, and its years are divided into common years and leap years, with a common year of twelve months, a leap year of thirteen months, and the months are divided into major and minor months, with a large month of thirty days and a small month of twenty-nine days, and its average calendar month is equal to one synodic month.

According to the national standard "Compilation and Promulgation of the Lunar Calendar" drafted by the Purple Mountain Astronomical Observatory of the Chinese Academy of Sciences, the new day is the first lunar day of the lunar month, which means that the first day of each lunar month must be the new lunar day.

Each lunar month reflects the complete cycle of moon phase change and is therefore part of the lunisolar calendar. The 24 solar terms in the lunar calendar reflect the different positions of the earth in its orbit around the sun, i.e., the return year cycle, and therefore belong to the solar part of the lunisolar calendar.

Months are divided into major months and minor months, with the major month having 30 days and the minor month having 29 days, and its average calendar month is equal to one synodic month. In order to reconcile the number of days between the synodic month and the return year, the total number of lunar phases and the total number of days in the return year of the solar calendar are adjusted by the "intercalation method" to match the total number of days in the return year of the solar calendar.

Lunar years are divided into common years and leap years. Twelve months in a normal year; Leap years are thirteen months. The lunar calendar is based on the lunar calendar (summer calendar), because the lunar calendar is based on the change of the moon phases and does not consider the movement of the earth around the sun, so the changes of the four seasons have no fixed time on the summer calendar and cannot reflect the change of seasons.

Because the lunar calendar takes the time for the moon to orbit the earth (moon day) as January, it is impossible to set a day, so the big month is set to be 30 days, the small month is 29 days (there are no 31 days), and the whole year is 354 or 355 days.

The months are big and the months are small, and they are different from year to year. Since the average number of days per year is about 11 days worse than that of the solar year (solar year), there are 7 leap months in 19 years, and the year with leap months is 383 or 384 days in 13 months, and the leap month is called a leap month after a certain month. According to the position of the sun, a solar year is divided into 24 solar terms, which is convenient for farming.

The chronology is matched with the sexagenary branches, and the cycle repeats itself for 60 years. This calendar is said to have originated in the Xia Dynasty, so it is also called the Xia calendar.

The lunar month is 30 days, the small month is 29 days, and there are no 31-day months. The lunar calendar takes the time (days) of the moon to circle the earth as January, which is the so-called "fixed value" in your question; The lunar month is big and small, and it is different from year to year, that is to say, the month is big and the moon is small, and it is determined by the moon phase and the moon.

Please be patient for 3 minutes, and we will answer you immediately, and please do not end the consultation. 1. The lunar calendar adopts a calculation method based on the lunar cycle. 2. The calculation of the lunar calendar is based on the cycle of the sun and the moon, which is different from the Gregorian calendar, and the dates and solar terms are different every year.

Specifically, after a year, the first day of each lunar month does not fall on the same day, but is advanced or postponed by some days. This is because there is a certain gap between the lunar month and the actual moon phase, so it should be calculated according to the actual moon phase. 3. In the lunar calendar, the first day of each month is also called Shuo, and the year of the lunar calendar is calculated according to the law of precession (that is, there is a leap year every 33 years), in addition to the 24 solar terms, which belongs to the category of traditional Chinese festival culture.

Lunar calendar, the traditional Chinese calendar. It changes according to the change cycle of the moon phase, and each moon phase synodic change is one month; And divide a solar return year into 24 segments, forming 24 solar terms. By referring to the solar return year, a leap month is set to adapt its average calendar year to the return year.

The lunar calendar merges the lunar and solar calendars to form a lunisolar calendar. I hope mine can help you, if you are satisfied with my service, please give a thumbs up, I wish you all the best!

Summary. Hello dear, the lunar calendar algorithm is as follows: the lunar calendar is the traditional calendar of our country, and there are names such as the lunar calendar, the Chinese calendar, the summer calendar, the Han calendar, the national calendar, etc., but the lunar calendar is not a lunar calendar but a luni-solar calendar.

The length of the year, by setting the twenty-four solar terms and the leap month to adapt the average calendar year to the return year, the operation method 01 month is the first day of the lunar month. The 0224 solar term divides the astronomical year into 24 parts according to the angle of the sun, and the solar term is 15 degrees. 03 The winter solstice must fall in the winter month of the lunar calendar, if it does not fall, it is necessary to add a month before the wax month as a leap month.

04 The first month after the winter moon of a leap year without a major solar term is a leap month. 05 The lunar year is based on a 60-year cycle. 06 The calculation of rules 1 and 2 is based on the observations of the Purple Mountain Observatory in Nanjing, China.

Hello dear dear, the lunar calendar algorithm is as follows: the lunar calendar is the traditional calendar of our country, and there are names such as the lunar calendar, the Chinese calendar, the summer calendar, the Han calendar, the national calendar, etc., but the lunar calendar is not a lunar calendar but a luni-solar calendar. The length of the year, by setting the 24 solar terms and the leap month to adapt the average calendar year to the return yearOperation method 01 The day when it is completely dark is the first day of the lunar month.

The 0224 solar term divides the astronomical year into 24 parts according to the angle of the sun, and the solar term is 15 degrees. 03 The winter solstice must fall in the winter month of the lunar calendar, if it does not fall, it is necessary to add a month before the wax month as a leap month. 04 The first month after the winter moon of a leap year without a major solar term is a leap month.

05 The lunar year is based on a 60-year cycle. 06 The calculation of rules 1 and 2 is based on the observations of the Purple Mountain Observatory in Nanjing, China.

Pro, the algorithm of the Chinese lunar calendar is summarized as follows: 1. China's lunar calendar is a lunisolar calendar used before 1912. 2. China's lunar calendar emphasizes the calculation of the cherry base nucleus month by year.

After the ridge digging is calculated month by month, it is known whether a certain month of a certain year is a big month or a small month; After calculating the front hall from year to year, we know whether a certain year is a leap year or a normal year. 3. China's traditional calendar has always been a lunisolar calendar and the 24 qi in parallel, and the 24 qi is suitable for agricultural production. 4. China's traditional calendar adopts the chronological system of the stem branch cycle (60 jiazi) as the cycle.

What is the lunar month and date of August 20 in the new calendar in 2023? Give me the most accurate answer.

Dear, August 20, 2023 is the fifth day of the seventh lunar month.

The fifth day of the seventh month is the day of the month.

Give the most accurate answer Do you call this an accurate answer?

The pro-lunar calendar is July 5th.

Gongxin only file calendar: August 20, 2023 Sunday of the 2023 lunar calendar on the fifth day of the seventh month of the third year of the mountain faction: 癸卯年 庚申月庚戌日.

So why do others say it's July 21st?

Dear, July 5th is right.