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"Viernes" is a noun which is often translated as "Friday", and "hoy" is an adverb which is often translated as "today". Learn more about the difference between "viernes" and "hoy" below.
el viernes()
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.
hoy()
An adverb is a word that describes a verb, an adjective, or other adverbs (e.g., to run quickly, very tired).
2. (nowadays)
