How many years does the lunar leap month occur and once every few years?

We all know that February in leap year is different from normal year. A year with 29 days in February is called a leap year. So, do you know what a leap month is? We sometimes hear friends say that he has two birthdays this year because he skipped a month this year. So, how many years does the lunar calendar leap? Let me tell you something about leap month.

Leap month refers to the lunar calendar and leap year refers to the solar calendar.

If you don't pay attention, probably many people think that leap month and leap year are the same meaning, but they are not. Although there is only one word difference between the two, their meanings are far from each other.

Leap year. What we usually call 365 days a year is actually a rough figure, and the exact figure should be 365.2422 days. Then there are 365 days in a year, which is 0.2422 days different from the actual year, so four years later, it is nearly one day less than the actual year. In order to make up for this difference, the calendar stipulates that four years is a leap year, that is, a year divisible by four is a leap year, and additionally stipulates that every century year (a year with two zeros at the end) must be divisible by 400 to be a leap year. For example, 1996 is a leap year, and 2000 is also a leap year, but 1700 is not. The leap year in the solar calendar has 29 days in February, the leap day is February 29 and the leap year in the solar calendar has 366 days. That is to say, February of leap year in the solar calendar is not called leap February, and leap month is unique to the lunar calendar.

In the China lunar calendar, a year with a leap month is called a leap month 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 in each 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 from February to the same month after 10, and the repeated months are leap months. For example, the leap month after April is called leap April. Calculation of leap month in lunar leap year, 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, 2006, 5438+0, May 27th 1982 and May 27th 1963 are the fifth day of leap April.