The corresponding relationship is:

Month and Day (げつよぅび, Ge Zuyou𞗜) = Monday.

Gunpowder Festival (かよぅび, Caiuby) = Tuesday.

Water Yao Day (すぃよぅび, Sue and I compare) = Wednesday.

Obsidian Day (もくよぅび, the ghost of the cave) = Thursday.

Jin Yaori (きんよぅび, Jin Youbi) = Friday.

Tuyao Day (どよぅび, you finish) = Saturday.

にちよぅび, Ni Mi You Bi) = Sunday.

Extended data:

The sun, the moon and the fire are collectively called "obsidian", and the seven-star stone of the sun, the moon, the fire, the water, the wood, the gold and the earth are collectively called "seven obsidian". In ancient China, South Korea, Japan, and North Korea, it was customary to say that there were seven days in a week, such as "Japanese Obsidian Day" was Sunday, "Moon Obsidian Day" was Monday, and so on.

Usually the day of the month will come before the day of the month, which does not conform to the general cognitive law of people from one to seven. This is because in the ancient calendar of our country, twenty-eight nights are arranged in the order of day, month, fire, water, wood, gold and earth, and every seven days they are called "seven nights". In the theory of seven evils, the sun is the head, the sun is the respect, and it is the beginning of all things. Nature should be put at the front, and the rest should be put in order.

Therefore, Japan usually uses the method of calculating the week from Japan to Japan, but in order to improve the calendar in China, we use Monday, Tuesday and Saturday. Because the seventh week is not easy to read, there are also Sunday in the west and Japan Day in Japan, so it is changed to Sunday.

Refer to Baidu Encyclopedia-Ri Yao Ri