diff --git a/frontend/src/App.jsx b/frontend/src/App.jsx
index 4609cfe..c2f7912 100644
--- a/frontend/src/App.jsx
+++ b/frontend/src/App.jsx
@@ -838,10 +838,11 @@ function Dashboard({ toast, mobile, setActive, unreadMsgs=0 }) {
       <Notepad    toast={toast} />
       <div style={{ marginTop:24, textAlign:'center',
         color:'rgba(255,255,255,0.12)', fontSize:9, fontFamily:'monospace', letterSpacing:1 }}>
-        GEBAUT {new Date(__BUILD_TIME__).toLocaleDateString('de-DE',
-          { day:'2-digit', month:'2-digit', year:'numeric' })}{' '}
-        {new Date(__BUILD_TIME__).toLocaleTimeString('de-DE',
-          { hour:'2-digit', minute:'2-digit' })}
+        {(() => { try {
+          const d = new Date(typeof __BUILD_TIME__ !== 'undefined' ? __BUILD_TIME__ : '');
+          if (isNaN(d)) return null;
+          return `GEBAUT ${d.toLocaleDateString('de-DE',{day:'2-digit',month:'2-digit',year:'numeric'})} ${d.toLocaleTimeString('de-DE',{hour:'2-digit',minute:'2-digit'})}`;
+        } catch { return null; }})()}
       </div>
     </div>
   );