French Dates Format: How to Write and Say Dates in French

Understanding how to read, write, and pronounce dates in French is one of the most foundational steps toward conversational and written fluency. Whether you are booking train tickets on SNCF, filling out administrative documents in France, or simply replying to an invitation, using the correct French dates format prevents costly misunderstandings.

While the system is logical and predictable, it contains critical differences from the American English format, particularly regarding word order, capitalization, and ordinal numbers.

Here is your comprehensive guide to mastering the French date format like a native speaker.

1. The Core Structure: Day / Month / Year

In standard French, dates always follow the ascending hierarchical order: Day / Month / Year (DD/MM/YYYY).

  • Written in full: mercredi 18 juin 2025
  • Short numerical format: 18/06/2025 or 18.06.2025

    • The American vs. French Trap

If an American sees `03/07/2025`, they think March 7, 2025. However, in France, this unmistakably means July 3, 2025.

Always double-check deadlines, appointments, and flight reservations to avoid confusing the month and the day.

2. No Capital Letters for Days and Months

One of the most frequent grammar mistakes made by English speakers is capitalizing days of the week and months of the year. In French, days and months are considered regular common nouns (noms communs), meaning they do not take a capital letter unless they appear at the very beginning of a sentence.

Days of the week (Les jours de la semaine)

  • lundi (Monday)
  • mardi (Tuesday)
  • mercredi (Wednesday)
  • jeudi (Thursday)
  • vendredi (Friday)
  • samedi (Saturday)
  • dimanche (Sunday)

    • Months of the year (Les mois de l'année)

  • janvier (January), février (February), mars (March)
  • avril (April), mai (May), juin (June)
  • juillet (July), août (August), septembre (September)
  • octobre (October), novembre (November), décembre (December)

Correct: Nous partons le mardi 4 août. Incorrect: Nous partons le ~~Mardi 4 Août~~.

3. The "Premier" Exception (Ordinal vs. Cardinal Numbers)

In English, you use ordinal numbers throughout the entire month: July 1st, July 2nd, July 3rd, July 21st.

In French, only the first day of the month uses an ordinal number: « premier » (abbreviated as 1er or 1ᵉʳ).

For every other day of the month, you must use regular cardinal numbers (two, three, four, etc.):

  • The 1st: le 1er mai (pronounced le premier mai)
  • The 2nd: le 2 mai (pronounced le deux mai — never le deuxième mai)
  • The 15th: le 15 mai (pronounced le quinze mai)
  • The 31st: le 31 mai (pronounced le trente-et-un mai)

Never write 1st or 1th in French; stick strictly to 1er.

4. Key Prepositions When Expressing Dates

Knowing which prepositions accompany dates will instantly improve your fluency:

Using "Le"

  • « La fête a lieu le 14 juillet. » (The celebration takes place on July 14th.)
  • « Nous arrivons le samedi 10 octobre. » (We arrive on Saturday, October 10th.)

    • To specify a single, specific date or a day of the week for an event, precede the day with the definite article le:

(Note: In French, you do not use "sur" to translate "on Saturday". You simply say "le samedi".)

Using "En" or "Au"

  • When referring to a month by itself, use en or au mois de:
  • « Je commence mon nouvel emploi en septembre. »
  • « Il fait chaud au mois de juillet. »
  • When referring to a year by itself, use en:
  • « Il est né en 1998. »

    • Expressing Date Ranges

  • « Le festival dure du 5 au 12 août. » (The festival runs from August 5th to August 12th.)

    • To express "from [date] to [date]", use the formula du [start date] au [end date]:

    5. How to Ask and Tell Today's Date

When chatting with friends or starting a business meeting, here is how you talk about today's date:

  • Questions:
  • « Quel jour sommes-nous ? » (What day are we? - formal/standard)
  • « Quelle est la date d'aujourd'hui ? » (What is today's date?)
  • « On est quel jour ? » (What day is it? - casual/spoken)
  • Answers:
  • « Aujourd'hui, nous sommes le lundi 15 septembre. »
  • « On est le 15 septembre. » (Most common conversational response)
  • « C'est le 15 septembre. »

    • Quick Checklist for French Dates Format

1. Sequence: Day + Month + Year (DD/MM/YYYY).

2. Case: Keep months and days lowercase (vendredi, mars).

3. Ordinals: Only the 1st day uses premier (1er). Days 2–31 use standard numbers.

4. Prefix: Use le before the date number, without extra prepositions like "on".

By keeping these straightforward rules in mind, you will navigate schedules, letters, and invitations in French with total accuracy.