English is similar, and now words represent a certain god.
It seems to be the localized naming of Norse gods.
The following content is taken from Baidu Encyclopedia.
In Latin, Sunday (Obsidian Day) is called dies solis, Monday (Obsidian Day) is called dies lunae, Tuesday (Obsidian Day) is called dies Martis, and Wednesday (Obsidian Day) is called dies Mercurii Day. Thursday (Obsidian Day) is "dead Jovis", Friday (Obsidian Day) is "dead Veneris" and Saturday (Obsidian Day) is "dead Saturn"; French directly adopts Latin names, but changes Sunday to "Sunday"; Because the names of the five planets are the names of gods in ancient Roman mythology. English has turned some of them into gods in ancient Germanic mythology, such as Tyre, the Teutonic God of War on Tuesday, Frigga, the Teutonic Goddess on Friday, Odin, the Teutonic God on Wednesday and Sol, the Teutonic God on Thursday. In Russian and Slavic, it has become the "first" and "second" day. ...
In Japanese, among the seven days in a week, the correspondence between the name of the week and the stars is obvious:
Monday? Monday corresponds to the moon, which is called Moon Obsidian Day. (The middle word is pronounced Yao)
Tuesday? Tuesday corresponds to Mars, which is called Obsidian Day.
Wednesday? Wednesday corresponds to Mercury, which is called Shuiyao Day.
Thursday? Thursday corresponds to Jupiter and is called Obsidian Day.
Friday? Friday corresponds to Venus (Vinus) and is called Jin Yaori.
Saturday? Saturn corresponds to Saturn, which is called Earth Obsidian Day.
Sunday? Sunday corresponds to the sun. This day is called Sun Yaori.
This correspondence is basically used in all languages of the Latin family.
On the other hand, English takes this corresponding concern a step further, and corresponds the name of the week to the immortals who represent these stars, mainly the immortals in northern Europe. English and Nordic languages are of the same origin.
Direct use on Monday and Sunday? The moon and? Sun, these two are needless to say.
Tuesday corresponds to Tyre, the god of war. So? Tuesday, actually? A variant of the Tyr era.
(Tell)
Wednesday? Wednesday corresponds to the Lord God Odin, but it corresponds to his other name "Wharton", so? Wednesday is actually? Woden Festival
(Odin)
Thursday? Thursday corresponds to Raytheon, right? Brother Hammer's Raytheon, so? Thursday, actually? Raytheon Festival
(Hammer Brother Classic Edition)
Friday? Friday corresponds to Odin's wife, frigga, the god of love. So? Friday, actually? Frigga Festival
(Frigga)
Saturday? Saturn is special, corresponding to Saturn, the god of agriculture and fertility in Roman mythology, named after Saturn.
(Saturn)
This is why the week in Japanese, Latin and English has nothing to do with numbers, which makes the order of the week in these languages very difficult to remember.
Fortunately, Chinese directly uses numbers, so Chinese has become a rare "language without nursery rhymes" in the mainstream languages of the world, because it is easy for us to remember the order without nursery rhymes. But we have children's songs of the zodiac. )