diff --git a/clients/web/locales/fr.json b/clients/web/locales/fr.json
index b3a05f0..569d66b 100644
--- a/clients/web/locales/fr.json
+++ b/clients/web/locales/fr.json
@@ -99,7 +99,7 @@
   "resend_verification": "Renvoyer l'email de vérification",
   "verification_email_resent": "Email de vérification envoyé.",
   "loading": "Chargement…",
-  "member_since": "Membre depuis",
+  "member_since": "Membre depuis le",
   "stat_games": "Parties",
   "stat_wins": "Victoires",
   "stat_losses": "Défaites",
diff --git a/clients/web/src/api.rs b/clients/web/src/api.rs
index 9e0f57c..d826165 100644
--- a/clients/web/src/api.rs
+++ b/clients/web/src/api.rs
@@ -244,10 +244,53 @@ pub async fn post_reset_password(token: &str, new_password: &str) -> Result<(),
 
 // ── Utilities ─────────────────────────────────────────────────────────────────
 
-pub fn format_ts(ts: i64) -> String {
+/// Maps to the `Intl.DateTimeFormat` options object accepted by `Date.toLocaleString`.
+/// `Default` passes no options (browser default: full date + time).
+pub struct DateFormatOptions {
+    /// "full" | "long" | "medium" | "short" — omit to suppress date part
+    pub date_style: Option<&'static str>,
+    /// "full" | "long" | "medium" | "short" — omit to suppress time part
+    pub time_style: Option<&'static str>,
+}
+
+impl Default for DateFormatOptions {
+    fn default() -> Self {
+        Self { date_style: None, time_style: None }
+    }
+}
+
+impl DateFormatOptions {
+    pub fn date_only() -> Self {
+        Self { date_style: Some("short"), time_style: None }
+    }
+
+    pub fn time_only() -> Self {
+        Self { date_style: None, time_style: Some("short") }
+    }
+
+    pub fn date_time() -> Self {
+        Self { date_style: Some("short"), time_style: Some("short") }
+    }
+
+    fn to_js_value(&self) -> wasm_bindgen::JsValue {
+        if self.date_style.is_none() && self.time_style.is_none() {
+            return wasm_bindgen::JsValue::UNDEFINED;
+        }
+        let obj = js_sys::Object::new();
+        if let Some(v) = self.date_style {
+            let _ = js_sys::Reflect::set(&obj, &"dateStyle".into(), &v.into());
+        }
+        if let Some(v) = self.time_style {
+            let _ = js_sys::Reflect::set(&obj, &"timeStyle".into(), &v.into());
+        }
+        obj.into()
+    }
+}
+
+pub fn format_ts(ts: i64, locale: &str, opts: &DateFormatOptions) -> String {
     let ms = (ts * 1000) as f64;
     let date = js_sys::Date::new(&wasm_bindgen::JsValue::from_f64(ms));
-    date.to_locale_string("en-GB", &wasm_bindgen::JsValue::UNDEFINED)
+    date.to_locale_string(locale, &opts.to_js_value())
         .as_string()
         .unwrap_or_default()
 }
diff --git a/clients/web/src/portal/game_detail.rs b/clients/web/src/portal/game_detail.rs
index adc3643..d0d17d4 100644
--- a/clients/web/src/portal/game_detail.rs
+++ b/clients/web/src/portal/game_detail.rs
@@ -32,8 +32,12 @@ pub fn GameDetailPage() -> impl IntoView {
 #[component]
 fn GameDetailView(game: GameDetail) -> impl IntoView {
     let i18n = use_i18n();
-    let started = api::format_ts(game.started_at);
-    let ended = game.ended_at.map(api::format_ts)
+    let locale_tag = match i18n.get_locale() {
+        Locale::en => "en-GB",
+        Locale::fr => "fr-FR",
+    };
+    let started = api::format_ts(game.started_at, locale_tag, &api::DateFormatOptions::date_only());
+    let ended = game.ended_at.map(|ts| api::format_ts(ts, locale_tag, &api::DateFormatOptions::date_only()))
         .unwrap_or_else(|| t_string!(i18n, game_ongoing).to_string());
 
     view! {
diff --git a/clients/web/src/portal/profile.rs b/clients/web/src/portal/profile.rs
index 9a94b3f..bd3c9c2 100644
--- a/clients/web/src/portal/profile.rs
+++ b/clients/web/src/portal/profile.rs
@@ -37,7 +37,11 @@ fn ProfileContent(profile: UserProfile, username: String) -> impl IntoView {
         async move { api::get_user_games(&u, p).await }
     });
 
-    let joined = api::format_ts(profile.created_at);
+    let locale_tag = match i18n.get_locale() {
+        Locale::en => "en-GB",
+        Locale::fr => "fr-FR",
+    };
+    let joined = api::format_ts(profile.created_at, locale_tag, &api::DateFormatOptions::date_only());
 
     view! {
         <div class="portal-card">
@@ -84,6 +88,10 @@ fn ProfileContent(profile: UserProfile, username: String) -> impl IntoView {
 #[component]
 fn GamesTable(games: Vec<GameSummary>, page: RwSignal<i64>) -> impl IntoView {
     let i18n = use_i18n();
+    let locale_tag = match i18n.get_locale() {
+        Locale::en => "en-GB",
+        Locale::fr => "fr-FR",
+    };
     let rows = games.clone();
     let has_next = games.len() == 20;
 
@@ -100,8 +108,8 @@ fn GamesTable(games: Vec<GameSummary>, page: RwSignal<i64>) -> impl IntoView {
             </thead>
             <tbody>
                 {rows.into_iter().map(|g| {
-                    let started = api::format_ts(g.started_at);
-                    let ended = g.ended_at.map(api::format_ts).unwrap_or_else(|| "—".into());
+                    let started = api::format_ts(g.started_at, locale_tag, &api::DateFormatOptions::date_only());
+                    let ended = g.ended_at.map(|ts| api::format_ts(ts, locale_tag, &api::DateFormatOptions::date_only())).unwrap_or_else(|| "—".into());
                     let outcome_class = match g.outcome.as_deref() {
                         Some("win")  => "outcome-win",
                         Some("loss") => "outcome-loss",