What months are there in Ruiyue in history?

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

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

A leap month is a way to set a leap month in a calendar. In China, leap month refers to the lunar calendar, and 1 leap is set every two to three years for every additional month in leap year. The lunar calendar adopts the method of 19 plus 7 leap months, that is, the "19 year 7 leap method", which well coordinates the tropic 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.

Historical evidence:

1,/kloc-The Yaodian of Shangshu before the 0/0th century (Zhou Dynasty) was forged by Jin people.

"Set the leap month at four o'clock, adult." Kong Chuan said, "If you are one year old, you still have twelve days. If you are not three years old, you will make a leap. "

2. "Zuo Zhuan Wen Zhuan Gongliu Year"? Zuo Qiuming in the Early Warring States Period

"leap month don't tell the new moon, indecent assault. Leap at the right time, do things at the right time, do things well, and bring life out. That's it. How can we serve the people without telling the new moon and abandoning current politics? "

3. Historical Records of Five Emperors? Sima Qian in the Western Han Dynasty

"Three hundred and sixty-six days, four o'clock in the leap month." In BC 104, Emperor Wu of the Han Dynasty felt that there were many disadvantages in the calendar of the pre-Qin Dynasty, so he ordered the establishment of a new calendar. At that time, the famous astronomer Luo Xiahong racked his brains and formulated the taichu calendar Act. Since then, there have been clear rules for setting leap months in China calendar.

Extended data

Leap moon refers to a phenomenon in the lunar calendar. The lunar calendar arranges the big moon and the small moon, that is, the moon, according to the full and short moon. The length of a moon is 29.5306 days, which is the cycle of the moon's profit and loss. According to the lunar calendar, the big moon has 30 days and the small moon has 29 days, so a year 12 months has 354 days, and the lunar month has no seasonal significance.

This year is 1 1 day from the solar calendar. Only after 17 years, the date of the lunar calendar will be reversed in the same season. Using this calendar naturally cannot meet the needs of agricultural production. Therefore, since the Qin and Han dynasties, the Chinese lunar calendar has been in parallel with the twenty-four solar terms, guiding agricultural production with the twenty-four solar terms.

The historic leap month since the founding of New China;

1949 leap in July

1952 leap in may

1955 leap March

1957 leap in August

1960 leap in June

1963 leap April

1966 March of leap year

1968 leap in July

197 1 leap may

1974 leap April

1976 leap in August