The difference between May of the lunar calendar and leap May.

There are leap months in the lunar calendar, but how to define which month is a leap month is related to the 24 solar terms. The date of the twenty-four solar terms of the lunar calendar is postponed month by month. In some lunar months, the gas will drop at the end of the month, and it will be out of gas next month. Generally, every two years, there will be a month without breath, which is exactly the year when leap months need to be added, so the lunar calendar stipulates that the month without breath is regarded as leap months, and the next few months are called leap months.