Where does “誕生日” come from?

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

誕生日 (Japanese): a birthday

Definitions

  1. a birthday

Ancestry of “誕生日”, step by step

誕生日 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 誕生

StepLanguageWordMeaning
1Japanese誕生birth; creation; formation; be born, come into...

Words derived from “誕生日”

Every word from Proto-Japonic *pi →Every word from Old Japanese 日 →Every word from Japanese 日 →