Traditional Culture Encyclopedia - Almanac inquiry - How to calculate leap month? What are the rules?
How to calculate leap month? What are the rules?
Leap moon law: The earth revolves around the sun once, and the number of months in a year cannot be odd zero, so there are only 354 days in a year 12 months. Compared with the actual year, it is about 1 1 day, which adds up to three years and 33 days. So there must be a leap month every three years, with three or four days left, which adds up to two years.
Leap year and leap month
There are leap years and leap months in the lunar calendar, but generally speaking, many people will confuse leap years and leap months. Although there is only one word missing, the meaning is really different. We can easily understand leap years. In general, it is: "leap once every four years, not for a hundred years, and leap again every four hundred years", but leap month is not like this at all.
To understand leap month first, you should know that there are 24 solar terms, which are divided into solar terms and neutral atmosphere in a year. There are leap months because the neutral atmosphere of 12 should be controlled within each month, because each neutral term must fall within the specified month. If a month is almost over and the neutral atmosphere hasn't arrived yet, you need to wait another month, which is the reason for leap month.
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