What does the Yellow Calendar retreat mean?

The Great March and the Great Retreat are geomantic sayings.

Big golden day:

On the second and fourth day of Monkey Country, I was fooled. On the sixth day, I looked for my mother. On the eighth day, I crossed the river with rabbits. On the twelfth day, I grazed sheep.

Eighteen dogs can bark, twenty cows can plow, and twenty-two snakes can talk.

Twenty-four tigers are strong, twenty-six horses walk, and twenty-eight chickens flourish.

Great retreat day:

The first day, every Children's Day, the third day, the fifth day, the ninth day, the eleventh day, the thirteenth day, the seventeenth ugly day, the 21st Children's Day, the 25th day, the 27th day and the 29th day.

Don't meet mice on the first day, sheep on the third day, on the horse's head on the fifth day, ask the chicken country on the ninth day, and don't meet rabbits on the eleventh day. Thirteen tigers are nearby, seventeen Niu Gengdi, twenty-one mice are deprived of food, twenty-five are afraid of barking, twenty-seven tigers are injured and twenty-nine monkeys are in action, so it is the most difficult to retreat during the day.

On the eighth day of the eighth lunar month, rabbits cross the river, twelve sheep graze and fourteen six dragons dangle.

Eighteen dogs can bark, twenty cows can plow, and twenty-two snakes can talk.

Twenty-four tigers are strong, twenty-six horses walk, and twenty-eight chickens flourish.