The date of the leap month is not fixed, and it may occur every three years or every two years.
Leap month is a strange phenomenon of the lunar calendar in our country. Because many people are not very clear about the calculation of the lunar calendar, they just want to know how many years a leap month? Let’s find out together.
Leap month is a leap of Chinese calendar.
In the lunar year, the month is based on the length of the synodic month of 29.5306 days, so in order to ensure that the first day of the month (the first day of the first month) must be the first day of the month, so that the arrangement of large and small months is not fixed.
In the lunar calendar, it is more common for two consecutive months to be a large or small month, and there have even been cases where March and April are small months, and September, tenth, eleventh and twelve consecutive months are large months.
The current leap-setting method is between two solstices, the leap-setting month starts with the “winter solstice,” if there is the first “neutral” month, this month is the leap month.
Every two years or more, there will be a month without moderate atmosphere, which coincides with the year when leap month is needed. Therefore, in the lunar calendar, the month without medium atmosphere is regarded as a leap month.