Excuse me, what year is June in history, and how is it calculated?

★ The leap month distribution table ranges from 1849 to 203 1.

Leap in June 1873, 1892,191,1930, 194 1,/kloc-0.

19 1 1 year, July 26th of Gregorian calendar, the first day of the sixth lunar month.

1930, July 26th, June 1st, Gregorian calendar.

194 1 year, July 24th of Gregorian calendar, the first day of the sixth lunar month.

1960, July 24th in the Gregorian calendar, the first day of June in the lunar calendar.

1979, July 24th in the Gregorian calendar, the first day of June in the lunar calendar.

1987, July 26th, June 1st, Gregorian calendar.

20 17, July 23rd, June 1st, Gregorian calendar.

★ The leap month distribution table ranges from 1849 to 203 1.

The year of leap month

Leap February 1890, 1909, 19 17, 1928, 1947, 2004, 2023.

Leap March 1860, 1879, 1898, 1936, 1955, 1966, 1993, 2003.

Leap April 1849, 1868, 1887, 1906, 1925, 1944, 1963,/.

Leap May 1857, 1865, 1876, 1884, 1895, 1903,19/kloc-.

Leap in June 1873, 1892,191,1930, 194 1,/kloc-0.

Leap July 1854, 188 1,19, 1938, 1949, 1968.

Leap August 185 1, 1862, 1900, 1957, 1976, 1995.

Leap September 20th14.

Leap October 1870, 1984.

★ leap month:

The lunar calendar used by China is actually a combination of yin and yang, mainly based on the movement cycle of the moon, that is, the lunar calendar; At the same time, the period of the earth around the sun, that is, the solar calendar, is considered

As early as three or four thousand years ago, our ancestors used the pure lunar calendar and solar calendar harmoniously. This is indeed a clever invention of our ancestors. According to scientific determination, the time of a new moon is 29th 12: 44: 3, about 29.5306 days. A solar year is 365 days, 5 hours, 48 minutes and 46 seconds, about 365.2422 days. The length of the lunar calendar is calculated according to the period of the earth around the sun.

If the lunar calendar is fixed at 12 months every year, there will be 29.5306 × 12 = 354.3622 days in a year, with a difference of about 10.879 days. If the Spring Festival is in winter this year, it will be celebrated in summer after16 (10.879×16 =174, which is equivalent to more than five months). Considering this, ancient astronomers compiled the lunar calendar, so that every day of every month contains the meaning of the moon phase.

19 solar year: 365.2422×19 = 6939.38+08; However, seven months after 19 lunar year, * * has (19× 12+7) = 235 moons, 235× 29.5306 = 6939.5438+00 days. In this way, the two are basically equal, and the months and seasons of the lunar calendar can be roughly coordinated for a long time, and there will be no inversion of cold and summer.

The position of the lunar calendar is completely artificial. Different dynasties have different placement of runyue. Before the Qin Dynasty, there was a time when Runyue was placed at the end of a year, which was called "March". In the early Han Dynasty, Runyue was placed after September, which was called "the last September". In the first year of Emperor Taizu of Han Dynasty (BC 104), every month of the year was inserted with Runyue, which stipulated that the month without "neutral gas" was used as the Runyue of the previous month, and the word "Runyue" was added to the name of last month, which has been used ever since. In this way, the lunar calendar ran for thirteen months.

In particular, the first month or two contains two neutral qi, and the last month, although there is no neutral qi, can not be regarded as a moisturizing month. For example, in the first month of the lunar calendar (1985), there was only one solar term (fright) without neutral qi. Last year, there were two neutral qi (Jiazi, 1984) in1month. With such a regulation, 19 years can be exactly seven months.

In the twelfth lunar month (twelfth lunar month), the earth is near the perihelion and moves faster, so there are fewer chances to leap into the moon. It is ok to have two Mid-Autumn Festival, but it is too difficult to have two "New Year's Eve". According to statistics (see the table below), from 1849 to 203 1, the jump is the most frequent in May. Leap in the first month, leap in November and leap in December did not happen; 20 14 September leap only happens once. It can also be seen from the statistical data that the distribution of leap months is irregular.

Leap month calculation:

Why is there a leap month in the lunar calendar? 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.

12 lunar months constitute lunar years, with a length of 29.5306× 12=354.3546 days, which is 10.88 days less than the regression and about 1/kloc-0 less than the monthly 0.9 1 day.

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, the length is 29.5306× 13=383.8978 days, which is more than the tropic 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 contradiction.

In order to overcome this shortcoming, our ancestors found the method of "leap month" on the basis of astronomical observation, ensuring that the first month to March is spring, April to June is summer, July to September is autumn, and October to December is winter, while ensuring that the first year of the lunar calendar is in late winter and early spring.

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 very common to be big or small for two consecutive months in the lunar calendar, and even there are rare exceptions, such as 1990 in which March and April are small, and 9, 10,1,1February 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:

The approximate value of this ratio 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 means that seven leap months must be added to 19 tropical year.

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

19 tropical year =19× 365.2422 = 6939.438+018 (days)

A lunar month has 29.5306 days, and 235 lunar months = 235× 29.5306 = 6939+38 days.

19 tropic year plus 7 leap months, the contradiction is eliminated: 6939.438+00-6939.18 = 0.0892 (days)-that is, more than 2 hours and 9 minutes, which is accurate enough.

Therefore, the lunar calendar adopts the method of 19 plus 7 leap months, that is, the "19 7 leap month method", which well coordinates the return year and the lunar year, so that the New Year's Day (Spring Festival) of the lunar calendar is always kept in the late winter and early spring. The ancients called 235 new moons "leap weeks".

The method of placing leap in the lunar calendar can make the average length of the lunar year close to the tropic year. The moon in the lunar calendar has distinct moon phase characteristics, which keeps the best characteristics of both the solar calendar and the lunar calendar.

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. The leap month begins on the "winter solstice". When there is no "neutral spirit" in the first month, this month is a leap month, and its name is to add the word "leap" before the previous month.

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.

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. Deciding 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 autumnal equinox. If a lunar month has only solar terms but no neutral atmosphere, one more month will be added to the calendar as a leap month. Taking 2006 as an example, July of the lunar calendar happened to be a month with solar terms but no neutral atmosphere, so there was an adjustment error in July.

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, April 29th of the 200 1 lunar calendar is full of breath, and the first day of every other month is the solstice of the next summer. If there is no gas this month, it will be a leap month, after April, so it is called leap April.