What does the almanac mean that crime is the most serious?

There is a saying in the Old Yellow Calendar that "the knife occupies the sun" is a specific day, that is to say, spring is Haizi Day, summer is Yinmao Day, autumn is Xinong Day, and winter is Shenyou Day. Whenever that day is called an anvil, it is a daily taboo: logging, grazing, collecting livestock, thickening livestock, acupuncture, puncturing and cutting six livestock, and cutting knives. From this point of view, it is a crime that should be decided by the swordsman.