Where does “日曜日” come from?

日曜日 (Japanese) comes from Japanese 日, from Old Japanese 日, from Proto-Japonic *pi — day, sun.

日曜日 (Japanese): Sunday

Definitions

  1. Sunday

Ancestry of “日曜日”, step by step

日曜日 traces back through two separate lines of ancestry.

via Japanese 日

StepLanguageWordMeaning
1Japanese日Sunday
2Old Japanese日the sun; sunlight, sunshine; daytime, daylight
3Proto-Japonic*piday, sun

via Japanese 日曜

StepLanguageWordMeaning
1Japanese日曜the sun; Sunday
Every word from Proto-Japonic *pi →Every word from Old Japanese 日 →Every word from Japanese 日 →