Where does “火曜日” come from?

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

火曜日 (Japanese): Tuesday

Definitions

  1. Tuesday

Ancestry of “火曜日”, step by step

火曜日 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 火曜

StepLanguageWordMeaning
1Japanese火曜planet Mars; Tuesday
Every word from Proto-Japonic *pi →Every word from Old Japanese 日 →Every word from Japanese 日 →