diff --git a/app/__init__.py b/app/__init__.py
index bd9992f..d22d506 100644
--- a/app/__init__.py
+++ b/app/__init__.py
@@ -31,6 +31,19 @@ def _migrate_db(app):
                 conn.commit()
 
 
+_JOURS_FR = ["lundi", "mardi", "mercredi", "jeudi", "vendredi", "samedi", "dimanche"]
+_MOIS_FR = ["", "janvier", "février", "mars", "avril", "mai", "juin",
+            "juillet", "août", "septembre", "octobre", "novembre", "décembre"]
+
+
+def _date_fr(d):
+    """Formate une date en français : 'mercredi 11 mars 2026'."""
+    from datetime import date as date_type
+    jour = _JOURS_FR[d.weekday()]
+    mois = _MOIS_FR[d.month]
+    return f"{jour} {d.day} {mois} {d.year}"
+
+
 def create_app(config_path=None):
     app = Flask(__name__, instance_relative_config=True)
 
@@ -50,6 +63,7 @@ def create_app(config_path=None):
         app.config["TOML"] = {}
 
     db.init_app(app)
+    app.jinja_env.filters["date_fr"] = _date_fr
 
     from app.routes.dashboard import bp as dashboard_bp
     from app.routes.entries import bp as entries_bp
diff --git a/app/templates/dashboard.html b/app/templates/dashboard.html
index 63a0bfa..45066d1 100644
--- a/app/templates/dashboard.html
+++ b/app/templates/dashboard.html
@@ -4,7 +4,7 @@
 
 <div class="bg-white rounded-xl shadow p-4 mb-4">
   <h2 class="font-semibold text-gray-700 mb-2">
-    Aujourd'hui — {{ today.strftime('%A %d %B %Y') }}
+    Aujourd'hui — {{ today | date_fr }}
   </h2>
   {% if today_entry %}
     <p class="text-green-700 font-medium">{{ today_entry.day_type }} — {{ today_entry.total_hours_str() }}</p>
diff --git a/app/templates/entry_list.html b/app/templates/entry_list.html
index 86bd019..13f147d 100644
--- a/app/templates/entry_list.html
+++ b/app/templates/entry_list.html
@@ -12,7 +12,7 @@
 {% for entry in entries %}
 <div class="bg-white rounded-xl shadow p-3 flex items-center justify-between">
   <div>
-    <p class="font-medium text-sm">{{ entry.date.strftime('%a %d %b %Y') }}</p>
+    <p class="font-medium text-sm">{{ entry.date | date_fr }}</p>
     <p class="text-xs text-gray-500">
       {{ entry.day_type }}
       {% if entry.time_slots %} — {{ entry.total_hours_str() }}{% endif %}