How to calculate leap month?

20 12 leap April, 20 14 leap September, 20 17 leap June, 2020 leap April, 2023 leap February.

Leap in June 2025, leap in May 2028, leap in March 20031year, leap in winter 2033 and leap in June 2036.

Leap in May 2039, leap in February 2042, leap in July 2044, leap in May 2047 and leap in March 2050.

Leap in August 2052, leap in June 2055, leap in April 2058, leap in March 2006/kloc-0, leap in July 2063.

Leap in May 2066, April 2069, August 20071year, June 2074 and April 2077.

Calculation method of leap month

Leap every three years, at least according to the wheel, 19 7 leap.

Determine the date order through the moon phase: calculate the date and time of the conjunction of the sun and the moon one by one. The first day of every month is the United Day. If the interval between this conjunction and the next conjunction is 30 days, then this month is the big moon; If it is only once every 29 days, it is an abortion.

Arrange months by gas: calendar months and leap months are distinguished according to whether there is gas in calendar months. A tropical year has 12 QIs, but it includes 365.2422÷29.5306 = 2.3682 months. After a few calendar months, there must be a calendar month without gas.