Cheat Sheet for Days of the Week in Spanish! - Tell Me In
The articles for days of the week in Spanish are el, los, un, unos, algunos. Definite articles (el and los) allow you to refer to days of the week in a very specific way. Indefinite articles and adjectives (un, unos and algunos) refer to unspecified days (not a specific Monday, but any Monday). Spanish days of the week are usually not capitalized.
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