What does it mean to say that you have committed a sheep sacrifice?

According to legend, the date of death is the 12th day of the year set by Yang Feng Shui, an ancient geomancer, to help the poor: the 13th day of the first month; February 1 1 day; On the ninth day of March; The seventh day of April, the fifth day; The second day of June; The first day of July; August 27; September 25; 1October 23rd; 1 1 month 2 1 day; December nineteenth. The basis for calculating the eight characters says: "Life was born on this day, and it is too hard to work." That's what it means.