vs
QUICK ANSWER
"Lunes" is a noun which is often translated as "Monday", and "viernes" is a noun which is often translated as "Friday". Learn more about the difference between "lunes" and "viernes" below.
el lunes(
loo
-
nehs
)A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
el viernes(
byehr
-
nehs
)A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
a. Friday
A partir de ahora, se puede llevar ropa informal en el trabajo los viernes.From now on you can wear casual clothes to work every Friday.