Traditional Culture Encyclopedia - Traditional customs - Chinese lunar leap month how to leap Which months are generally?

Chinese lunar leap month how to leap Which months are generally?

1, leap month: every 2 to 3 years to set a leap month.

The so-called leap month, that is, a whole month out of the year, which is in order to coordinate the return of the year and the Chinese calendar year contradictions, to prevent the Chinese calendar year and the return of the year and the four seasons out of step, every 2 to 3 years to set a leap month. In other words, there will be 13 months in a year in the new calendar, and the calendar that has been improved to favor agricultural activities is the lunar calendar. The leap month was created to harmonize the lunar and solar calendars.

An average year in the lunar calendar lasts only about 354 days, which is 11 days less than the Earth's rotational cycle. This was reflected in ancient times, most directly in the fact that the year was over and the seasons had not yet finished their turn. Ancient China was an agricultural society, and its subsequent changes directly guided farming. In order to get the calendar and the cycle of seasons in rhythm, the ancients decided to artificially increase the length of the year, so they set up intercalary months on top of the lunar calendar.

2. In the lunar calendar, the month after which the leap month occurs is called the leap months, for example, the leap month in 2017 occurs after the sixth month of the lunar calendar, so it is called leap June.

Expanded:

. p>The origin of the leap month
In 104 BC, Emperor Wu of Han felt that the pre-Qin calendar had many drawbacks. Lunar calendar to the moon's solstice as a cycle, the month big 30 days, the month is small 29 days, twelve months is about ?354 days, compared with the age of three hundred and sixty-six days, " a year there is a surplus of twelve days, not yet full of three years of age enough to get a month " year after year cumulative, it will make the month and the four seasons are misplaced. So ordered the development of a new calendar "Taichu Calendar", placed a leap month to correct the four seasons.
The twenty-four solar terms are based on the Earth's rotation around the sun at 15° per movement, and their dates are essentially fixed. The leap month is set based on the 24th solar term. The 24 solar terms are actually a collective term for the 12 solar terms and the 12 qi, with qi referring to the middle qi.
The method of intercalation is that between the two winter solstices, if there are only 12 months, then no intercalary, if there are 13 months, then intercalary. The intercalary month starts from the winter solstice, and when there is the first month without a "mid-air", then that month is a leap month, and its name is added to the previous month with the word "leap".
According to the "seven leaps in nineteen years" method of leaping in the lunar calendar, there is a leap almost every 2.3 years.
For example, the 2017 lunar calendar has 13 months. In the month following the sixth month of the lunar calendar, there is only ? "Liqiu" this one festival, and there is no mid-autumn, is the leap June. The Lunar Calendar, a traditional calendar in China, actually combines the movements of the moon and the sun in a kind of yin and yang calendar.
Reference:

Baidu Wikipedia - Leap Month

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