How do you calculate the days in the lunar calendar?
Generally, there will be a leap year every four years, that is, one more day every four years.
Knowledge about the lunar calendar
Lunar calendar (summer calendar, lunar calendar, ancient calendar, yellow calendar, old calendar)
The lunar calendar takes the time of the first month of the lunar calendar as the average time of the calendar month. This is the same as the pure lunar calendar, but the lunar calendar adopts the method of setting leap month and 24 solar terms, so that the average length of the calendar year is equal to the tropic year, which makes it have the elements of the solar calendar again, so it is better than the pure lunar calendar.
It is said that our ancestors used this calendar in all lunar calendar dates back to Xia Dynasty (65438 BC+07th century BC). So people also call it the summer calendar. After liberation, it was still called the summer calendar. After 1970, it was renamed as "Lunar Calendar" in China. As for the origin of the name "lunar calendar", it is probably because the country has been founded on agriculture since ancient times, so the calendar must serve agriculture.
The lunar calendar is based on the new moon. The time of the first month of the lunar calendar is 29th 12 hours, 44 minutes and 3 seconds (i.e. 29.5366 days), so the lunar calendar is also 30 days for the big month and 29 days for the small month, but it is not exactly the same as the pure lunar calendar, because the pure lunar calendar is arranged alternately with big and small months, and the size and month of the lunar calendar are determined by calculation.
The first day of each month in the lunar calendar happens to be a "new moon" (that is, the moon is in the middle of the sun and the earth faces the earth with a dark half). Sometimes there may be two big months or two small months in a row. Because the first month of the lunar calendar is slightly longer than 29 and a half days, there are about 53 big months and 47 small months in every 100 calendar month of the lunar calendar.
The lunar calendar basically takes 12 months as a year, but the time of 12 lunar months is 354.3667 days, which is about 1 1 day different from the tropical year. In this way, every three years, there will be 33 more days, that is, one more month.
In order to eliminate the extra days, one month is added every three years, which is the leap month of the lunar calendar. A year with a leap month is also called a leap year. Therefore, the lunar leap year has 13 months. As for the leap month, it is determined by the solar terms.
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 end the earth's cycle around the sun, that is, the tropic year, one month is added every two to three 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.
Another name for lunar month
January: the first month, the second month, the month of Meng, the end of the month, beginning of spring and beginning of spring;
February: such as the moon, apricot moon, mid-spring and early spring;
March: sick month, peach month, Ji Chun, March, March, Yangchun and late spring;
April: Yuyue, Qinghe, Taoyue and Xia Meng;
May: durian month, thin month, midsummer;
June: and month, lotus month, Xia Yue, the last month of summer;
July: Meet, Qiao Yue, Shuangyue, Qiu Meng and the same month;
August: Zhuangyue, Gui Yue, Mid-Autumn Festival and Mid-Autumn Festival;
September: Qiu Ji's sea moon and gathering moon;
October: Yangyue, Xiaoyangchun and Mengdong;
November: Gu Yue, Jiayue and Midwinter;
1February: Tuyue, Twelfth Moon, Jiaping Moon and Jidong Moon.
The first ten days of a lunar month are customarily called the first day. For example, the second day of the first month of the lunar calendar is called the second day of the first month. Of course, it is also correct to say 65438+10.2.
The first month of the lunar calendar (the first month of the year) begins after 65438+1October 20th and before the end of February. For example, the first day of the first lunar month may be 65438+10.21,or it may be February 20; On the contrary, the last day of the Lunar New Year is from 65438+1October 20th to the end of February.
The formula of big and small months in the lunar calendar
Make up two hexagrams a year, and it will be safe in early July and February.
Bian Xiao divination, meet leap moon thirteen Yin ocean.
Leap is between adjacent buildings, and the year and month are determined according to festivals.
Calculation method: In order to know the arrangement order of lunar months and whether there is a leap month in a certain year, this formula is specially formulated. "Make up two hexagrams a year, and be foolproof in early January and early July."
Under normal circumstances, the lunar calendar has twelve months in a year. We can make January to June the first divination, July to December the last divination, two divinations for several years, January the first divination and July the first divination. "Yin and Yang make small hexagrams and meet the 13th of leap month", we will use Yin as the symbol of big month, Yang as the symbol of small month, and Yin and Yang as the symbol of year in order of size. When there is a leap month, there is an extra month, and a year is thirteen months. In leap years, adjacent buildings are located between them, and the year and month should be calculated according to the festival. When there is a leap month in a year, it is represented by yin and yang according to the size of the leap month and marked in.
On the left in the middle of the leap month, just like a divination, you can know at a glance whether the leap month is big or small. At the same time, remind everyone that the year and date of the lunar calendar are not determined by the month when the perpetual calendar is compiled, but by the solar terms. Such as 1998, according to the above method can be compiled into "well" and "Kan" two hexagrams, and this year's leap May is a miscarriage month, and the symbol of the first half of the month is:
. : 。 . In the second half of the year, the symbol of moon divination is = = = =
"In the first half of the year, there was a positive trend between the fifth and sixth hexagrams. As you can see, the running score in May this year was 29 days.
How to judge leap year?
In the Gregorian calendar (Gregorian calendar), a year with leap days is called leap year, which is generally 365 days and 366 days. Because the earth's cycle around the sun is 365 days, 5 hours, 48 minutes and 46 seconds (365,438+09 days), which is the tropic year, the Gregorian calendar sets a year as 365 days. The remaining time is about one day in four years, plus February, so the normal year is 365 days, February is 28 days, leap year is 366 days, and February is 29 days. Therefore, there are 97 leap years every 400 years, with an additional day at the end of February, and leap years have 366 days. Calculation method of leap year: the number of years in the calendar year can be divisible by four, which is a leap year; Divided by 100 but not divided by 400 is a normal year; Leap years can be divisible by 100 or 400. For example, 2000 is a leap year, but 1900 is not.
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.
Gregorian calendar 1982-2042 and lunar leap year leap month comparison table
The year of the leap month (the first day) in the Gregorian calendar month.
65438+May 23rd 0982, leap April, small non-year.
1984165438+1October 23rd, October of leap year.
1July 26, 987, leap June, big year.
1June 23, 990 leap in May, that is, the great year of Gengwu.
1April 22, 993 March of leap year.
65438+September 25th, August of leap year 0995.
1June 24, 998, leap in May, small Wuyin year
May 23, 2006 5438+0 leap April, Xin Sinian.
March 2 1 day, 2004, is the February of Shen Jianian.
August 24, 2006, leap July, year of Dapu.
June 23, 2009, leap May, the year of ugliness.
20 12 may 2 1 leap April, the year of Xiao renchen.
1October 24, leap in September, Xiao Wu's good year.
2065438+July 23, 2007, leap June, Dading Younian.
May 23, 2020, jumped into April, the year of the little boxer.
March 22, 2023, leap February, the year of the Great Guimao.
July 25, 2025, leap June, has been four years.
June 23, 2028, leap in May.
April 22, 20031year, leap March, 1911.
August 25th, 2033, the year of leap in July.
July 23, 2036, leap June, Xiao Chen Bing Year.
June 22, 2039, leap in May, has not yet reached the end of the year.
March 22, 2042, leap February, a year of great uncertainty.