Which months of the year are full moons?

The full moon corresponds to 10 month in the solar year, and the ugly month corresponds to 10 month in the solar year.

However, it should be noted that this statement is still relatively rough. It can only be said that most of the days (more than two thirds) are in the corresponding solar calendar month, and less than one third are at the beginning of next month. Because according to the question you asked, the answer is at least simple and intuitive.

The correct concept is this: the so-called full moon and ugly moon are the earthly branches of the traditional equinox method. It is based on a solar term cycle (the first half is "festival" and the second half is "qi", which is commonly known as "solar term" by ordinary people). It is the cycle from the beginning of the solar term to the end of the next solar term in a month represented by a local branch. The full moon in this question refers to one month after the cold dew festival (including the first frost after the festival). The ugly month refers to the month after the slight cold (including the great cold after the holiday). If you are not familiar with various calendar relationships, it seems a bit of a headache. Interested parties may wish to compare it with the perpetual calendar.