How to calculate the lunar leap month?

An extra month in every leap year. In the lunar calendar, the length of the first lunar month (29.5306 days) is the average of one month, which is 65438+ February in the whole year, which is about1day and 2 1 hour different from the tropic year (365.2422 days), so it is leap in turn, one month in three years, two months in five years and seven in nineteen years.

What is the contradiction between the tropic year and the lunar year? Remember first: the total length of the tropic year is 365.2422 days, and the length of the first lunar month is 29.5306 days.

12 lunar months constitute the lunar year, with a length of 29.5306× 12=354.3546 days, which is 10.88 days less than the regression, and about 1 1 a month less than 0.9 1 day.

Lunar leap month runs once every three years, twice every five years and seven times in 19!

1949 leap in July 1952 leap in may 1955 leap in March 1957 leap in August 1960 leap in June 1963 leap in April 1966 leap in March.

1982 leap April 1984 leap October 1987 leap June 1990 leap may 1993 leap March 1995 leap August1995 leap August.