How many leap months are there in a leap year?

1949 leap July 1952 leap may 1955 leap March 1957 leap August 1960 leap June.

1963 leap April 1966 leap March 1968 leap July 197 1 leap may 1974 leap April.

1976 leap August 1979 leap June 1982 leap April 1984 leap October 1987 leap June.

1990 leap may 1993 leap March 1995 leap August 1998 leap may 200 1 leap April.

Leap February 2004 Leap July 2006 Leap May 20 12 Leap April 20 14 Leap September.

2017 leap in June and leap in April in 2020

As can be seen from the above table, there are many leap months in April, May and June, but few leap months in September and October, especially in November and December.

January and the first month. Why is this? It turns out that the time interval between these two gases is not the same. As mentioned earlier.

30.4368 days is just an average. In fact, the earth's orbit around the sun is an ellipse, and the sun is located on one of the ellipses.

Focus. The farthest point on the orbit from the sun is called apohelion, and the nearest point is called perihelion. The earth is far away.

If the motion near the sun point is slow, the time interval between two neutral gases will be very long, up to 3 1.45 days, so there is no possibility of neutral gases.

The more you have, the more chances you have to leap into the moon. On the contrary, the earth moves very fast near the perihelion, and the time interval between the two gases is very short.

The shortest is only more than 29 days, so there are fewer chances of being out of breath and less chances of leap month. In this way, we won't be surprised that there is no leap month in the first or twelfth month (including November of the lunar calendar). If the leap month is to be placed in the first month or ...