How to Say "tuesday" in Spanish
The Spanish word for “tuesday” is “martes” — A1 level. This is a very common word in everyday Spanish.

Examples
La reunión es el martes a las diez de la mañana.
The meeting is on Tuesday at ten in the morning.
Todos los martes vamos al gimnasio.
Every Tuesday we go to the gym.
¿Qué día es hoy? Hoy es martes.
What day is today? Today is Tuesday.
No Capitalization
Unlike English, days of the week in Spanish (like 'martes') are usually not capitalized unless they start a sentence.
Using 'On Tuesday'
To say 'on Tuesday,' you simply use the masculine article 'el' before the day: 'el martes.' You do not need a separate word for 'on.'
The Plural Form
Mistake: “Using 'los marteses' for 'Tuesdays'.”
Correction: The word 'martes' already ends in an 's' and does not change when made plural. Use 'los martes' for 'Tuesdays' or 'every Tuesday'.
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