What is broken in the yellow calendar?

An unlucky day in the old calendar. 2 1 day breaks the sun every year. (Lunar calendar) namely: 65438+ October 13th; February 1 1 day; The ninth day of March; The seventh day of April; The fifth day of May; The third day of June; July 1 day and 29; August 27; September 25; 65438+ October 23rd; 165438+ October 21st; 65438+February 19; Also: (beginning of spring, Changchun, beginning of autumn, beginning of winter) It was four miles away the day before; The day before (vernal equinox, autumnal equinox, summer solstice, winter solstice) were the four wonders. Note: Business trip, travel and catering should avoid this day.