What do you mean by "nothing is appropriate" on the calendar!

There are several "nothing is appropriate" situations on the calendar:

1, the earthly branch of that day collided with the earthly branch of that year ~ called "year-old break";

2. The collision between the earthly branches of the sun and the moon is called "breaking the moon";

3. The "four days" in the twenty-four solar terms, that is, the day before beginning of spring, Changxia, beginning of autumn and beginning of winter, are called "four days";

The days before the vernal equinox, autumnal equinox, summer solstice and winter solstice in the 24 solar terms are called "four departures".

The so-called "everything is not suitable" means that it is not suitable for doing big things, such as getting married, opening a business, traveling (going out of town), laying the foundation stone, moving into a new house, etc. And it doesn't mean normal things in daily life!