Days of the Week in French: Pronunciation, Spelling & the Grammar Trap

The days of the week are one of the very first things you learn in French — lundi, mardi, mercredi… — but there are three small traps that even intermediate learners still get wrong: the capital letters, the little word le, and where the week actually starts. In my new video I run through all seven days out loud, and this short guide gives you the pronunciation and the rules to go with them.

The 7 days of the week in French

Here are the seven days, from Monday to Sunday, with a rough English-friendly pronunciation. Say each one out loud as you read — the days are short and repetitive, which makes them easy to drill.

• lundi — Monday (luhn-dee)
• mardi — Tuesday (mar-dee)
• mercredi — Wednesday (mair-kruh-dee)
• jeudi — Thursday (zhuh-dee)
• vendredi — Friday (vahn-druh-dee)
• samedi — Saturday (sam-dee)
• dimanche — Sunday (dee-mahnsh)

Notice that six of them end in -di — that ending comes from the Latin dies, meaning "day". Only dimanche breaks the pattern.

Trap 1: don't capitalize them

In English we write Monday, Tuesday, Wednesday with a capital letter. In French you don't. Days are ordinary common nouns, so they stay lowercase — lundi, not Lundi — unless the word happens to start a sentence. The same rule applies to months (janvier, février…). Writing "Lundi" mid-sentence is one of the most common giveaways that someone is translating from English.

Trap 2: every day is masculine

All seven days are masculine, with no exceptions: un lundi, le mardi, ce vendredi, un beau dimanche. You never need to worry about feminine agreement with a day of the week — a small relief in a language full of gender rules.

Trap 3: "le lundi" vs "lundi" — the one that changes the meaning

This is the trap that actually matters for communication. Adding the article le in front of a day turns a specific date into a habit:

• Je pars lundi. — I'm leaving (this) Monday. One specific day.
• Je ne travaille pas le lundi. — I don't work on Mondays. Every Monday, as a rule.

So le lundi = "on Mondays / every Monday", while a bare lundi points to one particular Monday. Get this one right and your French instantly sounds more natural.

A memory trick: follow the planets

Five of the days are named after Roman gods and their planets, plus that -di ending — and English does exactly the same thing, which makes them easy to remember:

• lundi — la Lune (the Moon) → Mon(moon)day
• mardi — Mars → compare Spanish martes
• mercredi — Mercure (Mercury)
• jeudi — Jupiter
• vendredi — Vénus (Venus)

The last two come from elsewhere: samedi is from the Sabbath, and dimanche from the Latin dies dominicus, "the Lord's day".

Say the date like a local

Once you know the days, these are the phrases that put them to use straight away:

• On est quel jour ? / Quel jour sommes-nous ? — What day is it?
• On est lundi. / Nous sommes lundi. — It's Monday.
• aujourd'hui — today · demain — tomorrow · hier — yesterday
• la semaine — the week · le week-end — the weekend · en semaine — on weekdays

Practice them out loud

Vocabulary like this sticks fastest when you say it, not just read it. Play the video again and repeat each day after me until the rhythm feels automatic, then try answering "On est quel jour ?" without looking. If you want to go further and actually speak French with real feedback, I teach beginners one-to-one — you can book a free 30-minute trial lessonand we'll start from wherever you are. You can also see how I work as a French tutor in Bangkok & online.