In what year does leap month occur?

Leaping month is a way of calendar leap. In Asia (especially in China), leap month refers to one month added every leap year in the Chinese calendar (also known as the lunar calendar) (in order to coordinate the contradiction between the tropic year and the Chinese calendar and prevent the tropic year from being out of touch with the four seasons, 1 leap is set every two to three years. In ancient times, 19 leap week was used, but it was abolished in Linde calendar of Tang Dynasty. Sometimes leap month also refers to the month that contains leap day in leap year of Gregorian calendar (that is, February of leap year of Gregorian calendar).

Someone else? Seven jumps in nineteen years? The generalized method of. On the lunar calendar, because the average year is 12 months (temporarily called? Lunar month? The total number of days is less than the solar calendar 1 1 day, so the calendar stipulates that a leap month must be added every two or three years to make up for the difference of about one month. And because this difference is not a regular number, it is not very regular when leap months need to be added. However, with the growth of years, people have summed up one? Seven jumps in nineteen years? That is to say, in nineteen years, there should be seven leap months in the China lunar calendar. It depends on the disparity between the last month and the twenty-four solar terms, because the dates of the twenty-four solar terms in the lunar calendar are basically the same. But generally speaking, there is no leap month after the twelfth lunar month and the first lunar month.

How to calculate the lunar leap month?

The mid-year month of the lunar calendar is based on the length of 29.5306 days in the first lunar month, so the big month is 30 days and the small month is 29 days. In order to ensure that the first day of each month (the first day) must be a new moon, the arrangement of large and small months is not fixed and needs to be determined through strict observation and calculation. Therefore, it is common for the lunar calendar to be big and small for two consecutive months, and even there are rare exceptions such as March and April of 1990. September, 10,1month and1February are big for four consecutive months.

So how often do you add leap months? The best way is to find the least common multiple of the number of days in the tropical year and the number of days in the lunar month: we hope that the number of days in m tropical years is equal to the number of days in n lunar months, that is, there should be an equation:

m？ 365.2422=n？ 29.5306

In this equation, we can't directly find out m and n, but we can find out their proportions:

Its approximate value is:

In these fractions, the numerator represents the number of tropical years and the denominator represents the number of moons. For example, the sixth score =

This means that 19 tropic year must add 7 leap months.

Comparison of the results of adding 7 leap months in 19 tropical year;

19 tropical year = 19? 365.2422 = 6939.438+08 (days)

A lunar month has 29.5306 days, and 235 lunar months =235? 29.5306 = 6939+00 (days)

19 tropic year plus 7 leap months, the contradiction is eliminated: 6939.438+00-6939.438+08 = 0.0892 (days)? That is more than 2 hours and 9 minutes, which is accurate enough.

So the lunar calendar adopts the method of 19 plus 7 leap months, that is? Seven jumps in nineteen years? Coordinate the tropic year with the lunar year, and leave the New Year's Day (Spring Festival) in late winter and early spring. The ancients called 235 moons? Leap week? .

The method of placing leap in the lunar calendar can make the average length of the lunar year close to the tropic year, and the moon in the lunar calendar has distinct moon phase characteristics and maintains the characteristics of killing two birds with one stone.

Leap month year (grade 20 17-2 120)

20 17 leap June big 2020 leap April small 2023 leap February small 2025 leap June small 2028 leap may small 203 1 leap March small.

2033 leap winter month small 2036 leap June big 2039 leap May small 2042 leap February small 2044 leap July small 2047 leap May small

2050 leap March big 2052 leap August small 2055 leap June big 2058 leap April small 206 1 leap March small 2063 leap July small.

2066 leap may small 2069 leap April small 207 1 leap August small 2074 leap June small 2077 leap April small 2080 leap March small.

2082 leap July small 2085 leap May big 2088 leap April small 2090 leap August small 2093 leap June big 2096 leap April small.

Leap February 2 10 1 leap July 2 104 leap May 2 107 leap April 2 109 leap September 21kloc-0/2 leap June.

2 1 15 leap April big 2 1 18 leap March big 2 120 leap July small.

What month is the lunar leap month?

It depends on the 24 solar terms in a year.

In the China lunar calendar, 24 solar terms are divided into 12 solar terms and 12 neutral terms.

At present, the method of setting leap is between two winter solstice. If it is only 12 months, it is not a leap; if it is 13 months, it is a leap. Set to fly to the moon? Winter solstice? At first, when the first one appeared? Gas? June, this month is a leap month, and its name is added one month before? Leap? Words.

The lunar calendar takes the moon as the cycle (lunar calendar), and the December calendar is about 354 days. Combined with the almanac (solar calendar), the almanac is compiled according to the four-season cycle formed by the revolution of the earth. The monthly calendar is shorter than the annual calendar by 1 1 day. Therefore, it is necessary to add 7 leap months every 19 years to make up for the error. Which month is a leap month depends on 24 solar terms. Lunar months usually include a solar term and a neutral atmosphere, such as the vernal equinox. If a lunar month has only solar terms and no neutral atmosphere, the calendar will take that month as the leap month of last month. Take 2006 as an example. After July of the lunar calendar, there happens to be a month with only solar terms and no neutral atmosphere, so we set leap July to adjust the error.

The date of the twenty-four solar terms of the lunar calendar is postponed month by month, so in some lunar months, the gas falls at the end of the month, and it will be out of gas next month.

Generally, there will be a month without gas every two years, which coincides with the year when leap months are needed. Therefore, the lunar calendar stipulates that non-neutral months are leap months.

For example, May 2 1, 200 1 and April 29 of the lunar calendar are all qi. A month later, June 2 1, the first day of the fifth lunar month, is the next summer solstice of qi. This month (200 1? June 20, 2006 5438+0) If it is not neutral, it is a leap month. Because it is after April, it is called leap April.

Why is there a leap month?

The lunar leap month is to coordinate the contradiction between the tropic year and the lunar year.

What is the contradiction between the tropic year and the lunar year? Remember first: the total length of the tropic year is 365.2422 days, and the length of the first lunar month is 29.5306 days.

Twelve moons make up a lunar year with a length of 29.5306? 12=354.3672 days, which is 10.88 days less than that of the return, and 1 day less than that of 0.9 1 day every month1day or so, nearly1day.

Accordingly, if the Spring Festival in one year of the lunar calendar is a snowy winter, the Spring Festival in the next year will be 1 1 day earlier than the season, and 16 Lunar New Year will appear in the hot summer.

If the lunar year consists of thirteen lunar months, then the length is 29.5306? 13=383.8978 days, which is more than the tropical year 18 days.

If the calendar is made according to the above regulations, there will be a strange phenomenon that the weather is inconsistent with the calendar and the time order is disordered and reversed? This is the contradiction.

In order to overcome this shortcoming, our ancestors discovered it on the basis of astronomical observation. Leap moon? This method ensures that the first month to March is spring, April to June is summer, July to September is autumn, and October to December is winter. At the same time, it also ensures that the Lunar New Year begins in late winter and early spring.

How to celebrate the birthday of leap month?

The ancients defined leap months according to the odd and twenty-four solar terms, and even numbers were called neutralization. Whenever the lunar month is not neutral, it is set as a leap month, which usually occurs in April and May, so leap April and May are the most, leap 9 and 10 are less, leap 1 1 month, leap 1 February and leap/kloc.

In this case, people born in leap months will have to wait a long time for their last birthday. For example, 1957 If people born in leap August always celebrate their birthdays in the lunar calendar, they will have to wait until the next leap August before they can have a real birthday.

Upon inquiry, the leap August years after 1957 are 1957, 1976, 1995, which means that people born in 1957 have only three birthdays in the 20th century. The year after entering 2 1 century is 2052, which is 57 years different from 1995. And if it is 1984 people born in leap October, according to the low frequency of leap October, now it will take 150 years to celebrate their birthdays!

It is obviously unrealistic to have a birthday every few decades or hundreds of years. So, how do children born in leap months celebrate their birthdays? What the ancients did was leap-moon connection? Need to leap? If there is no leap month in the year of birth, birthdays are celebrated in the same month. For example, the birthday on the first day of leap July is the first day of July. On the other hand, if you were born on New Year's Eve, if you are under 30 this year, you will celebrate your birthday on the 29th of New Year's Eve.

However, many young people in modern times spend their birthdays in the solar calendar instead of the lunar calendar, so it is less and less common to wait for decades to celebrate their birthdays. Only the previous generation still kept the habit of celebrating birthdays in the lunar calendar. However, if you really have to wait for decades or even hundreds of years, you will probably get used to the birthday of the solar calendar.

Can leap month have two birthdays? It is possible to have two birthdays, but from the perspective of folklore, most people still have their first birthday.

It should be noted that according to tradition, birthdays are celebrated before the birthday of a leap month, not after it. If it is a full tenth birthday, it should be one month in advance, and small birthdays (every tenth birthday is called a big birthday, and the rest are called small birthdays) don't matter.

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