How many years does the lunar calendar leap?

How to calculate the lunar leap month?

Find the least common multiple of the number of tropical years and the number of moons: m tropical years and n moons are equal, that is, there should be an equation: m× 365.2422 = n× 29.5306, and the ratio of m and n can be found: the numerator represents the number of tropical years and the denominator represents the number of moons. The lunar calendar adopts the method of 19 plus 7 leap months, that is, the "7 leap method of 19", which coordinates the tropic year with the lunar year and keeps the first day of the lunar new year in late winter and early spring.

How many years does the lunar calendar leap?

Leap month refers to the lunar calendar and leap year refers to the solar calendar.

If you don't pay attention, probably many people think that "leap month" and "leap year" are the same meaning, but they are not. Although there is only one word missing, the meaning is far from the same.

"Leap year", which we usually say is 365 days a year, is actually a rough figure, and the exact figure should be 365.2422 days. Then there are 365 days in a year, which is 0.2422 days different from the actual year, so four years later, it is nearly one day less than the actual year. In order to make up for this difference, the calendar stipulates that four years is a leap year, that is, a year divisible by four is a leap year, and additionally stipulates that every century year (a year with two zeros at the end) must be divisible by 400 to be a leap year. For example, 1996 is a leap year, and 2000 is also a leap year, but 1700 is not. The leap year in the solar calendar has 29 days in February, the leap day is February 29 and the leap year in the solar calendar has 366 days. That is to say, February of leap year in the solar calendar is not called leap February, and leap month is unique to the lunar calendar.

In the China lunar calendar, a year with a leap month is called a leap month year. The general year is 12 months, 354 or 355 days, and the leap year is 13 months, 383 or 384 days. As a kind of lunar calendar, the number of days in each month depends on the monthly loss, and the time of one year is based on 12 months. In order to close the earth's cycle around the sun, that is, the tropic year, one month is added every two to four years, and the added month is a leap month, so the leap year of the lunar calendar is 13 months.

There is no thirteenth month in the lunar calendar. According to the calendar rules, leap months are repeated from February to the same month after 10, and the repeated months are leap months. For example, the leap month after April is called leap April. Calculation of leap month in lunar leap year, three-year leap, five-year leap, 19 leap; The lunar calendar basically takes 19 as a cycle, corresponding to the same time in the Gregorian calendar. For example, in the Gregorian calendar, May 27th, 2006, 5438+0, May 27th 1982 and May 27th 1963 are the fifth day of leap April.

The difference between leap year and leap month

Leap year is a term in the Gregorian calendar. The Gregorian calendar stipulates that there are 97 leap years every 400 years, and a year that does not meet every 100 years can be divisible by 4, which is a leap year. February this year is 29 days; February in other years is 28 days. Except for February, there is no difference between the days of a normal year and a leap year.

Leaping moon is a term in the China lunar calendar. Because the lunar calendar is a lunar calendar, we should give consideration to both the moon and the sun. Since15th or16th is a full moon, each month is about 29.5 days. Generally 12 months has only 355 days. This year's accumulation will be out of touch with the season (because the period of revolution on Earth is 365 days). Therefore, one month should be added every three years or so, so that the long-term average length of lunar year is the same as that of Gregorian year, which is about 365.2425 days. The added month is called leap month. The leap month in the lunar calendar is probably the seventh leap month in the nineteenth year.

How to calculate the leap month birthdates?

As we all know, there is a difference between lunar calendar algorithm and solar calendar algorithm. According to the December of the lunar calendar, the lunar calendar has only 354.4 days a year, which is less than the return of the solar calendar 10.9 days. In order to prevent the phenomenon of "snow falling in June" in some years, it is necessary to coordinate the seasonal relationship between the lunar calendar and the solar calendar. In the Spring and Autumn Period, China adopted the "seven leap months in the 19th year", that is, in the 19th tropic year (6939.6 days), seven leap months should be inserted into the lunar calendar, so that the changes of cold and heat in the lunar calendar are basically consistent with those in the Gregorian calendar.

And 20 12 year happens to be the seventh month of the lunar calendar, so there are two July. Looking up the bone weight table of fortune-telling month does not explain the bone weight of people born in leap month. How to count people born in leap months when fortune telling, should we use 0.9 liang in July or 1.5 liang in August?

Neither. Those born in the first half of leap month are counted as this month, and those born in the second half are counted as next month.

For example, those born on July 14 this year will be 0.9 taels in July.

Born on July 16 in leap month, it is 1.5 in August.

Note that the ancients used hours to measure time, and one hour is equivalent to two hours in modern times. There is a special hour at twelve o'clock, which spans two nights from11-01. If11-12 was born at night, it will be counted as the next day.