The similarities of the days of the week in different languages

I was learning the days of the week in a different language when I realised that the days of the week in most languages is based on something. 

In most of the European languages, Germanic, English, Latin and Greek:

Sunday is named after the sun, Monday the moon, Tuesday of Mars, the god of war, Wednesday of Mercury, Thursday of Jupiter, Thor or thunder, Friday of Venus, of love and beauty, and Saturday of Saturn. 

In Chinese, it is as simple as following the number of the day beginning from Monday using the word for star 星, all except for Sunday that is named after the sun 日. 

里期一 xīng qī yī

星期二 xīng qī èr

星期三 xīng qī sān

星期四 xīng qī sì

星期五 xīng qī wǔ

星期六 xīng qī liù

星期日 xīng qī rì

In Korean, the days of the week are named after nature: 

월요일 wolyoil - moon

화요일 hwayoil - fire

수요일 suyoil - water

목요일 mokyoil - wood

금요일 geumyoil - gold

토요일 toyoil - earth

일요일 ilyoil - sun

This makes memorizing so much easier especially when the words for nature are from Chinese to begin with. And it's the same in Japanese. 

But what's common across are Sunday and Monday, the sun and the moon. 

pearlie