diff --git a/public/s/js/comments.js b/public/s/js/comments.js
index c3df664..1da9be1 100644
--- a/public/s/js/comments.js
+++ b/public/s/js/comments.js
@@ -1959,9 +1959,15 @@ class CommentSystem {
         setInterval(() => {
             const timestamps = this.container.querySelectorAll('.comment-time.timeago');
             timestamps.forEach(el => {
-                const dateStr = el.getAttribute('tooltip');
-                if (dateStr) {
-                    el.textContent = this.timeAgo(dateStr);
+                // data-iso stores the raw ISO date for timeAgo calculation;
+                // the tooltip attribute holds the human-readable formatted date.
+                const isoStr = el.getAttribute('data-iso') || el.getAttribute('tooltip');
+                if (isoStr) {
+                    el.textContent = this.timeAgo(isoStr);
+                    // Keep tooltip in human-readable format
+                    if (window.f0ckFormatDateFull) {
+                        el.setAttribute('tooltip', window.f0ckFormatDateFull(isoStr));
+                    }
                 }
             });
         }, 30000);
@@ -2028,7 +2034,10 @@ class CommentSystem {
         }
 
         const timeAgo = this.timeAgo(comment.created_at);
-        const fullDate = new Date(comment.created_at).toISOString();
+        const isoDate = new Date(comment.created_at).toISOString();
+        const fullDate = window.f0ckFormatDateFull
+            ? window.f0ckFormatDateFull(comment.created_at)
+            : isoDate;
 
         // Parent context marker removed (redundant with back-references)
         let contextMarker = '';
@@ -2056,7 +2065,7 @@ class CommentSystem {
                             ${contextMarker}
                             ${backlinkHtml}
                         </div>
-                        <a href="#c${comment.id}" class="comment-time timeago" tooltip="${fullDate}" data-id="${comment.id}" data-username="${comment.username}" data-display="${this.escapeHtml(comment.display_name || '')}">${timeAgo}</a>
+                        <a href="#c${comment.id}" class="comment-time timeago" tooltip="${fullDate}" data-iso="${isoDate}" data-id="${comment.id}" data-username="${comment.username}" data-display="${this.escapeHtml(comment.display_name || '')}">${timeAgo}</a>
                     </div>
                     <div class="comment-content" data-raw="${this.escapeHtml(comment.content)}">${content}</div>
                     ${this.renderCommentAttachments(comment.files, comment.content)}
diff --git a/public/s/js/f0ckm.js b/public/s/js/f0ckm.js
index 63673d2..31d4773 100644
--- a/public/s/js/f0ckm.js
+++ b/public/s/js/f0ckm.js
@@ -8026,15 +8026,50 @@ document.addEventListener('DOMContentLoaded', () => {
     // Expose globally so comments.js, user_comments.js, messages.js etc. can use the same i18n-aware implementation
     window.f0ckTimeAgo = timeAgo;
 
+    // Format an ISO date string as DD.MM.YYYY - HH:MM:SS in local time
+    const formatDateFull = (dateStr) => {
+        const d = new Date(dateStr);
+        if (isNaN(d.getTime())) return dateStr;
+        const pad = n => String(n).padStart(2, '0');
+        return `${pad(d.getDate())}.${pad(d.getMonth() + 1)}.${d.getFullYear()} - ${pad(d.getHours())}:${pad(d.getMinutes())}:${pad(d.getSeconds())}`;
+    };
+    window.f0ckFormatDateFull = formatDateFull;
+
     const updateGlobalTimestamps = () => {
         document.querySelectorAll('.timeago').forEach(el => {
-            // Check tooltip attr first (item pages), fall back to data-ts (sidebar, no tooltip)
-            const dateStr = el.getAttribute('tooltip') || el.getAttribute('data-ts');
-            if (dateStr) {
-                const newTime = timeAgo(dateStr);
+            // On first run, seed data-iso from the server-rendered tooltip (raw ISO string)
+            // so we always have a reliable source for time calculations even after the
+            // tooltip is rewritten to the human-readable DD.MM.YYYY format.
+            if (!el.dataset.iso && el.hasAttribute('tooltip')) {
+                el.dataset.iso = el.getAttribute('tooltip');
+            }
+
+            // Use data-iso (seeded above) → data-ts (sidebar) → tooltip as fallback
+            const isoStr = el.dataset.iso || el.getAttribute('data-ts');
+            if (isoStr) {
+                const newTime = timeAgo(isoStr);
                 if (el.textContent !== newTime) {
                     el.textContent = newTime;
                 }
+                // Update tooltip to show nicely formatted local date instead of raw ISO string
+                if (el.hasAttribute('tooltip')) {
+                    const niceFull = formatDateFull(isoStr);
+                    if (el.getAttribute('tooltip') !== niceFull) {
+                        el.setAttribute('tooltip', niceFull);
+                    }
+                }
+            }
+        });
+
+        // Also reformat tooltip on static date elements (e.g. .stat-joined on profiles)
+        // that carry a data-iso attribute but are NOT .timeago (text content not updated).
+        document.querySelectorAll('[data-iso][tooltip]:not(.timeago)').forEach(el => {
+            const isoStr = el.dataset.iso;
+            if (isoStr) {
+                const niceFull = formatDateFull(isoStr);
+                if (el.getAttribute('tooltip') !== niceFull) {
+                    el.setAttribute('tooltip', niceFull);
+                }
             }
         });
     };
diff --git a/src/inc/routes/index.mjs b/src/inc/routes/index.mjs
index 7cc13b1..107ea0c 100644
--- a/src/inc/routes/index.mjs
+++ b/src/inc/routes/index.mjs
@@ -147,7 +147,7 @@ export default (router, tpl) => {
 
     userData.timestamp = {
       timeago: lib.timeAgo(userData.created_at, req.lang),
-      timefull: userData.created_at
+      timefull: new Date(userData.created_at).toISOString()
     };
     userData.age_days = Math.floor((Date.now() - new Date(userData.created_at).getTime()) / 86400000);
 
diff --git a/views/user-partial.html b/views/user-partial.html
index efad9e6..860643b 100644
--- a/views/user-partial.html
+++ b/views/user-partial.html
@@ -30,7 +30,7 @@
             @else
                 <div class="stat-id">ID: {{ user.user_id || user.id }}</div>
     
-                <div class="stat-joined" title="{{ user.timestamp.timefull }}">{{ t('profile.age_days', { n: user.age_days }) }}</div>
+                <div class="stat-joined" tooltip="{{ user.timestamp.timefull }}" data-iso="{{ user.timestamp.timefull }}">{{ t('profile.age_days', { n: user.age_days }) }}</div>
                     @if(!user.is_ghost)
                         <div class="stat-comments">{{ t('profile.stat_comments') }} <a href="/user/{!! user.user !!}/comments">{{ count.comments }}</a></div>
                         <div class="stat-tags">{{ t('profile.stat_tags') }} {{ count.tags }}</div>