diff --git a/js/event-popup.js b/js/event-popup.js
index 8ed6434..eb35e11 100644
--- a/js/event-popup.js
+++ b/js/event-popup.js
@@ -42,16 +42,14 @@
     if (!isoStr) return "";
     var d = new Date(isoStr);
     if (isNaN(d.getTime())) return isoStr;
-    return (
-      formatDate(isoStr) + " " + pad2(d.getHours()) + ":" + pad2(d.getMinutes())
-    );
+    return formatDate(isoStr) + " " + formatTimeOnly(isoStr);
   }
 
   function formatTimeOnly(isoStr) {
     if (!isoStr) return "";
-    var d = new Date(isoStr);
-    if (isNaN(d.getTime())) return isoStr;
-    return pad2(d.getHours()) + ":" + pad2(d.getMinutes());
+    var match = isoStr.match(/T(\d{2}):(\d{2})/);
+    if (!match) return isoStr;
+    return match[1] + ":" + match[2];
   }
 
   function formatEventListTime(startIso, fallbackTime) {
diff --git a/js/main.js b/js/main.js
index 84cf290..e2a2134 100644
--- a/js/main.js
+++ b/js/main.js
@@ -94,35 +94,15 @@
     );
     if (!nodes || nodes.length === 0) return;
 
-    var formatter;
-    try {
-      formatter = new Intl.DateTimeFormat("de-DE", {
-        hour: "2-digit",
-        minute: "2-digit",
-        hour12: false,
-      });
-    } catch (e) {
-      formatter = null;
-    }
-
     for (var i = 0; i < nodes.length; i++) {
       var node = nodes[i];
       var raw = node.getAttribute("data-luxtools-start") || "";
       if (!raw) continue;
 
-      var date = new Date(raw);
-      if (isNaN(date.getTime())) continue;
+      var match = raw.match(/T(\d{2}):(\d{2})/);
+      if (!match) continue;
 
-      var label;
-      if (formatter) {
-        label = formatter.format(date);
-      } else {
-        var hh = String(date.getHours()).padStart(2, "0");
-        var mm = String(date.getMinutes()).padStart(2, "0");
-        label = hh + ":" + mm;
-      }
-
-      node.textContent = label;
+      node.textContent = match[1] + ":" + match[2];
     }
   }