Answer: No.
Lunes, martes, miércoles, jueves, viernes, sábado y domingo.
Explanation:
According to the grammar rules given by the Royal Academy of the Spanish Language, <em>the days of the week are not capitalized</em>.
They are only capitalized when the day of the week is the first word of a sentence or list of words.
<h2><em>Spymore</em></h2>