What does the auspicious day in the perpetual calendar mean?

China's traditional old calendar "Old Yellow Calendar" says, Shaxi: Don't go west, or avoid doing things in that direction on the way.

Rushing the snake to the west means that on this day, people born in the year of B (1965) were not suitable for moving westward at that time. However, there is also a saying that "renovation broke ground here". If the door of the house you want to decorate (your own entrance door) faces west, please avoid this day.