Month break (月破)Compass termsNine Star Ki 九星気学

月破 is the same mechanism as 歲破 on a finer scale: whichever direction this month's branch occupies, the opposite is 月破. So the whole rule is one principle applied at three time scales — year, month, and the finer 日破.

That structure is useful, because it makes timing discriminable. If something is only caught by the month, the fix might be a different week; if it's caught by the year, a different week won't do and you need a different season or a different direction. The same dial, two scales, different advice.

So the practical way to read the compass isn't asking whether a bearing is good. It's asking which layer is talking. The year's layer answers in quarters and the month's in weeks — match the scale and the system becomes usable.