The only free and comprehensive online etymological dictionary of the Spanish language
viernes m. (Noun) "Friday"
13th cent. Old Spanish vienres via metathesis. From Latin veneris dies "Friday," but literally "day of Venus." For the etymology of veneris "of Venus," see Venus; for the etymology of dies "day," see día.
Asturian vienres, Galician venres, Catalan divendres, French vendredi, Italian venerdì, Aromanian vinjiri, Romanian vineri