Why is there a leap May? In which years there is a leap May

In the traditional Chinese lunisolar calendar, the length of the lunar month is taken as the average value of one month, and the length of the year is 12 months, and the difference between the length day of the return year is about 10 days and 21 o'clock, and it is necessary to set the intercalary month to maintain the corresponding relationship between the lunisolar calendar and the celestial phenology. In China's ancient six calendars, the leap month method of 3 years and 1 month, 5 years and 2 months, and 19 years and 7 months of leap month is used, and the month added in each leap year is called "leap month". For example, the Qin Dynasty and the early Western Han Dynasty used the "Zhuan Xiang Calendar", which starts with October and takes September as the end of the year, and the leap month is placed after September, which is called "post-September".

At the beginning of the Western Han Dynasty, when the Taichu calendar was formulated, the leap month was divided into the months of the year, and it was stipulated that the months without Zhongqi were used as the leap months, and the monthly sequence was still used as the monthly sequence of the previous month, as long as it was called "leap month". This rule of intercalation is most reasonable in the use of a flat calendar. In the Qing Dynasty, the calendar was changed to a fixed qi calendar, and if the rule of not placing a leap in the center was continued, it was possible to place two leap months in a year.

Therefore, it is added that a leap year is defined as a leap year in which there are 13 months between the two winter solstices, and that the first month of a leap year without a neutral air is designated as a leap month. This rule is still in use today.

Leap years are intercalary.

April, May, and June are the most, and leap.

September and October are the least, and leap November, December, and New Year do not occur, at least for thousands of years.

Every nineteen years there must be a leap month.

According to the solar terms, I won't go into detail, the solar terms are said separately, some are festivals and some are gas, simply put, there are two solar terms per month, but there are errors in the solar terms and the calendar, the solar terms are strictly in accordance with climate change, in fact, the earth is formulated, but the calendar is not, this error will lead to a certain month only one solar term after a few years, at this time it will be necessary to solve the leap month, that is to say, the calendar year is actually not enough for a year, the time is not allowed, and a month will be added in a few years, In this way, accuracy can be guaranteed.

Now the Gregorian calendar is commonly used in the world, that is, the earth revolves around the sun for one year, and the time is days. China's traditional calendar lunar calendar is calculated by the moon look, 1 month is usually 29 days or 30 days, 12 months are not 355 or 354 days, and the Gregorian calendar year has a time difference, for the scientific integrity of this calendar, so the use of leap month. As for the leap months, according to the season.

The so-called "lunar calendar" in China actually belongs to the "lunisolar calendar" in the calendar classification, which is a calendar compiled by taking into account the two movements of the earth around the sun and the moon around the earth (manifested as the change of the moon phase).

The 24 solar terms represent the return movement of the sun (the movement of the earth around the sun), while the 24 solar terms are actually divided into solar terms and middle terms, with the beginning of spring being the solar term and the rain being the middle ......And so on, the solar terms and the middle qi are arranged alternately. The time it takes for the Moon to move around the Earth for one time is a day. A "lunar" month has 29 days for a small month and 30 days for a major month (the first day of the lunar month is the date when the moon phase is "new"), so there may be no mid-air in the "lunary" month.

When there is no mid-air in a "lunar month", the month is called a leap month, and the month that follows it is called a leap month.

The year of the leap May

1903, 1914, 1922, 1933, 1952, 1971, 1990, 1998, 2009, 2028.

Leap May refers to the month added to every leap year, so leap May is the month added to every leap year and before six months after the fifth month of the lunar calendar.

Around the turn of the 21st century, leap May is the most frequent leap month (but not static, and the frequency of leap May will gradually decrease over time), usually every 8 or 11 years. The Dragon Boat Festival corresponds to the earliest year of the solar calendar, and the Torch Festival corresponds to the latest year of the solar calendar.

Leap months are calculated and are not fixed in the order of the month, especially in leap April, May and June, and few in leap September and October, especially in leap eleven, December and first month. There were 13 months in the lunar calendar that year, and that year was called a leap year. The lunisolar calendar takes the length (day) of the synodic month as the average value of the month, and the difference between December and the return year (day) is about 10 days and 21 o'clock, so the leap is placed in order, one month for the three-year leap, two months for the five-year leap, and seven months for the nineteenth year.

A leap month is added after a certain month and is called "leap month". The book. Yaodian":

The four hours of the leap month are set at the age of adulthood. Kong Chuan: "One year old has more than 12 days, and before the third year old is full of one month, it will be intercalated."

Left pass. The sixth year of Duke Wen": "If the leap month is not announced, it is indecent."

The leap is at the right time, the time is to do things, and the things are to make a living, and the way of the people is there. If you don't tell the leap and abandon the current politics, how can you be the people? ”

The calculation of leap months in leap years in the lunar calendar is one leap in 3 years, two leaps in 5 years, and seven leaps in 19 years; The lunar calendar is basically a cycle of 19 years, corresponding to the same time in the Gregorian calendar. For example, May 27, 2001, May 27, 1982 and May 27, 1963 in the Gregorian calendar are all the fifth days of the fourth month of the leap month.

Comparison table between the Gregorian calendar from 1982 to 2042 and the leap year of the lunar calendar The month of the Gregorian calendar Leap month (the first day of the first day of the new month) The dry branch year.

May 23, 1982 Leap April Minor Year of Renwu.

November 23, 1984 Leap October Jiazi year.

July 26, 1987 Leap June.

June 23, 1990 Leap May, Great Geng Wu Year.

April 22, 1993 Leap March Lunar New Year.

September 25, 1995 Leap August

June 24, 1998 Leap May.

May 23, 2001 Leap April Great Xin Si Year.

March 21, 2004 Leap February.

August 24, 2006 Leap Month Seventh Year of Propion.

June 23, 2009 Leap May is the year of the ugly one.

May 21, 2012 Leap April Year of the Lunar New Year.

October 24, 2014 Leap September Minor Jiawu Year.

July 23, 2017 Leap June, Year of the Great Ding You.

May 23, 2020 Leap April is the year of Gengzi.

March 22, 2023 Leap February.

July 25, 2025 Leap June.

June 23, 2028 Leap May Year of the Great Wushen.

April 22, 2031 Leap March New Year.

August 25, 2033 Leap July is the year of the Ugly Calendar.

July 23, 2036 Leap June

June 22, 2039 Leap May is the first year of the year.

March 22, 2042 Leap February.

<> China has always adopted the "lunisolar calendar", that is, the calendar that combines the lunisolar and solar calendars. The solar calendar is the solar calendar, and the lunar calendar is the solar calendar, which is the time it takes for the earth to revolve around the sun and the time for the moon to revolve around the earth for 12 cycles, respectively.

The reason why the lunisolar calendar is combined is because China has always been an ancient agricultural civilization before liberation, and agriculture is very developed and mature, so there must be a definite calendar to serve agriculture, when to sow and when to harvest, there must be a definite period, otherwise agricultural production will be impossible to arrange.

So since there is a lunar calendar, why add a solar calendar? That's because we use the solar calendar, which is a calendar of 365 days in a return year, and the lunar calendar, which is the lunar calendar, can only count months, and there is a certain gap between the two.

The leap month occurs because of the gap between the lunar and solar calendars, that is, the cycle of the moon revolving around the earth 12 times is different from the time it takes for the earth to revolve around the sun, about 10 days to be exact. The date of a solar year is 365 days, while the date of a lunar year is 354 or 355 days.

Therefore, every four years, a month is added to the lunar calendar, which is the "leap month". To be exact, it is nineteen years and seven runs.

Leap May is an extra month between May and June of the lunar calendar, which occurs roughly every 8 or 11 years.

So, yes, the remaining years of the 21st century, the years with the possibility of leap May are:

2028 (2009+19) years.

2039 (2028+11) years.

2047 (2039+8) years.

2066 (2047+19) years.

2085 (2066+19) years.

As for the exact number of months in a leap year, it is determined by the 24 solar terms, and the missing month of the solar term is made up in the leap month, so that the lunar and solar calendars can be consistent.

2009 Leap May.

1949 -2020 Lunar Leap Month Table.

1949 Leap July 1952 Leap May 1955 Leap March 1957 Leap August 1960 Leap June.

1963 Leap April 1966 Leap March 1968 Leap July 1971 Leap May 1974 Leap April.

1976 Leap August 1979 Leap June 1982 Leap April 1984 Leap October 1987 Leap June.

1990 Leap May 1993 Leap March 1995 Leap August 1998 Leap May 2001 Leap April.

2004 Leap February 2006 Leap July 2009 Leap May 2012 Leap April 2014 Leap September.

2017 Leap June 2020 Leap April.

As can be seen from the above table, leap April, May and June are particularly common, leap September and October are particularly rare, especially without leap eleven and twelve.

Month and New Year. Why is that? It turns out that the time interval between the two middle gases is not the same. Previously mentioned.

Days are just averages. In fact, the Earth's orbit around the Sun is an ellipse, and the Sun is located on one of the ellipses.

on focus. The farthest point in orbit from the Sun is called "aphelion", and the closest point is called "perihelion". The earth is far away.

If the movement near the day point is slow, the time interval between the two zhongqi is long, and the longest reaches the day, so there is no possibility of zhongqi.

The more, the more opportunities there are for leap months. On the contrary, if the earth moves fast near perihelion, the time interval between the two mid-air zones is short, and the shortest is only more than 29 days. In this way, we are on the first month.

It would not be surprising that there is no leap month in the lunar month (including the 11th month of the lunar calendar). If the leap month is to be placed in the first month or the wax month, then.

Wouldn't we be able to celebrate two Spring Festivals or two Chinese New Year's Eves? In fact, this kind of calendar used to exist before the Qing Dynasty, but later due to.

With the change of the calendar method, there will be no such coincidence. There will be no leap months in the first and second months of the lunar month for a short period of time. Wax Moon is a name for the twelfth month of the lunar calendar, which evolved from the "Wax Day".

Lap Day is the day when the ancients sacrificed to the gods. This kind of activity first began in the Zhou Dynasty, and there is no exact record of what day it was. In the Han Dynasty, the day of Lari was set to the third day after the winter solstice, that is, the day when the earth branch was the day of the Ganzhi Chronicle.

Because the winter solstice is not fixed on the lunar calendar, the wax day is not fixed. Later, people designated December 8 as Wax Day. Regarding this point, it is recorded in the "Jing Chu Years Chronicle":

December 8 is the day of Wax. ”

The day of worship to the gods is called the day of wax, and it should start from the word wax. There is no "moon" next to the ancient La, and the pictogram is a small animal that has been eviscerated and roasted on the sun. Later, people also called the dried meat in pieces called wax, and in the Zhou Dynasty, the person who mastered the wax was called the hail man.

With the wax sacrifice to the gods, so the sacrifice day is called the wax day, because the wax day is set in December, so December is also called the wax month.