What do black, white, yellow and green on the yellow calendar mean?

Black, white, yellow and green on the yellow calendar mean black, which means that this day is taboo, red means that this day is a holiday, and green means that this day is a legal holiday. In the yellow calendar, black and white, red, green, purple, Huang Bi and other colors are the main five elements. Nine purple Star Palace is running for nine days. They are: one white, two black, three blue, four green, Huang Wu, six white, seven red and eight white, and nine purple. Yellow refers to loess, and purple dominates purple fire, both of which dominate the chromaticity of the five elements.

The content includes changes and influences: one white tube represents wealth and happiness, two black tubes represent diseases and six kinds of animals, three green tubes represent quarrels and disputes, four green tubes represent liberal arts wisdom, Huang Wu tube represents death, filial piety and disaster, six white tubes represent martial arts (inspecting soldiers and martial arts fields) and agricultural harvest, and seven red fingers represent prisons, trials, losses, retreats and thefts.

Eight whites refers to the form of marriage with foreign currency, and nine purple refers to imported fire, eye diseases and lucky stars. One white should also be a happy event for people to import.