What does it mean to say that you violate the Yanggong sacrifice in horoscope calculation?

The death anniversary of Mr. Yang is said to be the twelve days of death set by the ancient Feng Shui master Yang Jiupong: the 13th of the first lunar month; the 11th of the second lunar month; the 9th of the third lunar month; and the 7th of the fourth lunar month. May 5th; June 2nd; July 1st; August 27th; September 25th; October 23rd; November 21st; December 19th . The horoscope calculation is based on this saying: "When you are born and meet this day, you will gain and lose after hard work." That's what it means.