Where does “サンデー” come from?
サンデー (Japanese) comes from English sundae, from English sunday, from Middle English Sonday, from Old English sunnandæg, from Proto-Germanic *Sunnōn dag, from Latin dies Solis, from Latin sōl, from Proto-Indo-European sóh₂wl̥ — sun.
サンデー (Japanese): Sunday; a sundae
Ancestry of “サンデー”, step by step