What year does the calendar query run in May?

1949 leap in July 1952 leap in may 1955 leap in March 1957 leap in August 1960 leap in June 1963 leap in April 1966 leap in March. Leap April 1976 leap August 1979 leap June 1982 leap April 1984 leap October 1987 leap June 1990 leap may/kloc- Leap in April 2004, leap in February 2006, leap in July 20, 200912 leap in May 20 14 leap in September 20 17 leap in June 2020 leap in April.

As can be seen from the above table, there are many leap months in April, May and June, but few leap months in September and October, especially in November, December and January. Why is this? The time interval between the two gases is different. The aforementioned 30.4368 days is only an average. In fact, the earth's orbit around the sun is an ellipse, and the sun is at a focus of the ellipse. The farthest point on the orbit from the sun is called apohelion, and the nearest point is called perihelion. When the earth moves slowly near the apohelion, the time interval between two neutral phases is longer, the longest is 3 1.45 days, so there is more possibility of no neutral phase and more chances of leap in the moon. On the contrary, the earth moves very fast near the perihelion, so the time interval between the two phases is very short, the shortest is only more than 29 days, so there is less chance of no phase and less chance of leap month. In this way, we won't be surprised that there is no leap month in the first or twelfth month (including November of the lunar calendar). If leap month is to be placed in the first or twelfth month, can't we have two Spring Festival or two New Year's Eve? In fact, this kind of calendar existed before the Qing Dynasty, but later, due to the change of calendar annotation method, there was no such coincidence. There will be no leap months in the first and twelfth months.

Lunar leap month contains two solar terms every month. The working people in ancient times called the first solar term (beginning of spring, Jing Zhe, Qingming, Long Summer, Mangzhong, Xiaoshu, beginning of autumn, Bailu, Cold Dew, beginning of winter, Heavy Snow and Slight Cold) "solar term". The last solar term (rain, vernal equinox, Grain Rain, Xiaoman, summer solstice, summer heat, autumn equinox, first frost, light snow, winter solstice and severe cold) is called "Zhong Qi". How to arrange the lunar leap month? In the history of our country, there have been different ways to deal with it. In the Western Han Dynasty, the leap month was placed at the end of the year, and in the early Han Dynasty, it was called "the last September". After the Han dynasty, the month without neutral atmosphere was designated as the leap month of the first lunar month, and this rule of placing leap has continued to this day.

Why is a lunar month not neutral? The result is that the average time between two neutral gases is 365.2422÷ 12=30.4368 days, and then 30 or 3 1 day. The earth's orbit around the sun is elliptical, and it moves slowly at the perihelion (vernal equinox and autumnal equinox), and the interval between two solar terms can be as long as 3 1.45 days. On the other hand, the average lunar new moon is only 29.5306 days, including 29 days in the first lunar month and 30 days in the second lunar month. In this way, there will be such a situation: in some months (usually abortion), the last breath has passed at the beginning and the next breath has not come yet at the end. For example, 200 1 (New Year's Eve) is May 21(April 29), and the first day of the next lunar month is May 23. However, this lunar month ends on June 20, and the summer solstice is June 2 1, so this lunar month is not "neutral", it falls in the fourth month of the lunar calendar. This year's vernal equinox is on March 20th (February 30th), the first day of the next lunar month is on March 2nd1day, ending on April 8th/kloc-0, and the third day is in Grain Rain on April 20th. In this way, the month after February of this year's lunar calendar without "neutral gas" is designated as leap February. According to this leap law, leap in July 2006, leap in May 2009, leap in April 20 12, leap in September 20 14, leap in June 20 17, leap in April 2020. As for the lunar month, this involves the solar terms. There are 24 solar terms in a year, which is just a traditional saying. In detail, it should be said that there are twelve solar terms and twelve neutral qi in a year. Which of the twelve qi belongs to which month is regular: rain is the qi of the first month; The vernal equinox is in mid-February; Grain Rain is the spirit of March; Xiaoman is the spirit of April; The solstice in summer is mid-air in May; The high temperature in summer is in mid-June; Summer heat is the qi of July; The autumnal equinox is in mid-August; The first frost is the breath of September; Light snow is a neutral atmosphere in October; The winter solstice is 1 1 mid-month; The great cold is mid-air in December. As for which month the twelve solar terms are in, it is not necessarily so. A month in the lunar calendar is a little more than 29 days and a half on average, but the interval from one breath to the next is less than 30 days and a half on average. In this way, in the lunar month, the gas will be delayed by 1 day every month. At a certain time, qi will not be in the middle of the month but will move to the end of the month. If next month is a miscarriage, then there is probably no gas in this month, because gas will be moved to the beginning of the third month. The middle month is not neutral, even if last month was a leap month.

Take 1998 as an example: June 2 1 in the solar calendar is May 27th of the lunar calendar, and it is the summer solstice (mid-May); But July 23rd in the solar calendar is the first day of June in the lunar calendar, which is the great summer heat (the qi of June). From June 24th to July 22nd of the Gregorian calendar (one month after the end of May of the lunar calendar), there is only one solar term, and this month is leap May. Therefore, it is not mysterious that the lunar leap month is determined by people according to certain rules. In the China lunar calendar, a year with a leap month is called a leap 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 per 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 in the same month from February to 10, and the repeated months are leap months. For example, the leap month after April is called leap April. Lunar leap year leap month calculation, 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, 200 1, May 27th 1982 and May 27th 1963 are the fifth day of leap April. The month of the leap month is inferred according to the laws of the lunar calendar, mainly according to the coincidence degree with the 24 solar terms of the lunar calendar; The number of leap months in the lunar calendar is the same as that in normal months, both of which are 29 or 30 days.

The so-called "leap" in the lunar calendar is only called leap year and leap month, and there are also leap years in the Gregorian calendar.