Why English Capitalizes Days of the Week While Spanish Forbids It

An insightful review of Why English Capitalizes Days of the Week While Spanish Forbids It—check out the main takeaways.

Q1: Why does English capitalize the names of months while Spanish does not?

A1: English applies the proper-noun category uniformly to all primary astronomical and calendar divisions, including January through December. Spanish follows the RAE rule classifying months as general temporal indicators, keeping them in lowercase unless they mark a recognized historic holiday or title.

Q2: Are Spanish days of the week ever capitalized?

A2: Yes, but only in exceptional syntactic circumstances: when the word starts a sentence, appears inside the official title of an institution, festival, or historic event (such as Viernes Santo), or forms part of a dedicated proper book or film title.

Q3: How do weekday abbreviations differ in professional correspondence?

A3: English standardizes on three-letter abbreviations followed by a period or left open depending on style guide (Mon., Tue., Wed., Thu., Fri., Sat., Sun.). Spanish generally employs two-letter lowercase contractions (lu., ma., mi., ju., vi., sá., do.), often omitting trailing periods in compact digital design tables.