diff --git a/cal.css b/cal.css
index 907db8a..4c882eb 100644
--- a/cal.css
+++ b/cal.css
@@ -1,4 +1,5 @@
-html, body {
+html,
+body {
   margin: 0;
   padding: 0;
   font-family: Arial, Helvetica Neue, Helvetica, sans-serif;
@@ -25,13 +26,13 @@ a.fc-event.fc-daygrid-event[href]:visited {
   background: var(--fc-neutral-bg-color);
 }
 
-.fc .fc-scrollgrid-section-sticky > * {
+.fc .fc-scrollgrid-section-sticky>* {
   background: unset;
   position: sticky;
   z-index: 3;
 }
 
-:not(td[aria-labelledby]) > .fc-daygrid-day-frame {
+:not(td[aria-labelledby])>.fc-daygrid-day-frame {
   background: var(--fc-neutral-bg-color);
 }
 
@@ -39,10 +40,27 @@ a.fc-event.fc-daygrid-event[href]:visited {
   background: var(--fc-page-bg-color);
 }
 
-.fc .fc-timegrid-slot-label, .fc .fc-timegrid-axis-frame {
+.fc .fc-timegrid-slot-label,
+.fc .fc-timegrid-axis-frame {
   background-color: var(--main-page-bg-color);
 }
 
+.missing-page {
+  background: #b10a3c;
+}
+
+.incomplete-page {
+  background: #947e00;
+}
+
+.cancelled-event {
+  background: repeating-linear-gradient(45deg,
+      #555,
+      #555 10px,
+      #333 10px,
+      #333 20px);
+}
+
 :root {
   --main-page-bg-color: #211e21;
   --fc-small-font-size: .85em;
diff --git a/cal.js b/cal.js
index dad4125..49f49c4 100644
--- a/cal.js
+++ b/cal.js
@@ -1,51 +1,89 @@
 var events = [
   {
-    title: "All Day Event",
-    start: "2023-09-01",
+    title: "Auffrischung Mathematik - Teil 1",
+    start: "2023-10-04T10:30:00",
+    end: "2023-10-04T12:00:00",
+    url: "https://ia.lu-dev.de/#/page/auffrischung%20mathematik%2F23-10-04"
   },
   {
-    title: "Long Event",
-    start: "2023-09-07",
-    end: "2023-09-10",
+    title: "Auffrischung Mathematik - Teil 2",
+    start: "2023-10-05T10:30:00",
+    end: "2023-10-05T12:00:00",
+    url: "https://ia.lu-dev.de/#/page/auffrischung%20mathematik%2F23-10-05",
+    classNames: ["incomplete-page"]
   },
   {
-    groupId: "999",
-    title: "Repeating Event",
-    start: "2023-09-09T16:00:00",
+    title: "Auffrischung Mathematik - Teil 3",
+    start: "2023-10-06T10:30:00",
+    end: "2023-10-06T12:00:00",
+    classNames: ["missing-page"]
   },
   {
-    groupId: "999",
-    title: "Repeating Event",
-    start: "2023-09-16T16:00:00",
+    title: "Mathematik für Informatiker 1",
+    start: "2023-10-09T13:00:00",
+    end: "2023-10-09T14:30:00",
+    classNames: ["missing-page"]
   },
   {
-    title: "Conference",
-    start: "2023-09-11",
-    end: "2023-09-13",
+    title: "Grundlagen und Diskrete Strukturen",
+    start: "2023-10-10T09:00:00",
+    end: "2023-10-10T10:30:00",
+    url: "https://ia.lu-dev.de/#/page/grundlagen%20und%20diskrete%20strukturen%2F23-10-10"
   },
   {
-    title: "Meeting",
-    start: "2023-09-12T10:30:00",
-    end: "2023-09-12T12:30:00",
+    title: "Übung: Programmierung und Algorithmen",
+    start: "2023-10-10T11:00:00",
+    end: "2023-10-10T12:30:00",
+    classNames: ["missing-page"]
   },
   {
-    title: "Lunch",
-    start: "2023-09-12T12:00:00",
+    title: "Rechnerorganisation",
+    start: "2023-10-10T13:00:00",
+    end: "2023-10-10T14:30:00",
+    classNames: ["cancelled-event"]
   },
   {
-    title: "Meeting",
-    start: "2023-09-12T14:30:00",
-    url: "https://lu-dev.de",
+    title: "Programmierung und Algorithmen",
+    start: "2023-10-11T11:00:00",
+    end: "2023-10-11T12:30:00",
+    classNames: ["missing-page"]
   },
   {
-    title: "Birthday Party",
-    start: "2023-09-13T07:00:00",
+    title: "Mathematik für Informatiker 1",
+    start: "2023-10-11T15:00:00",
+    end: "2023-10-11T16:30:00",
+    classNames: ["missing-page"]
   },
   {
-    title: "Click for Google",
-    url: "https://google.com/",
-    start: "2023-09-28",
+    title: "Übung: Grundlagen und Diskrete Strukturen",
+    start: "2023-10-11T17:15:00",
+    end: "2023-10-11T18:45:00",
+    classNames: ["missing-page"]
   },
+  {
+    title: "Rechnerorganisation",
+    start: "2023-10-12T13:00:00",
+    end: "2023-10-12T14:30:00",
+    classNames: ["missing-page"]
+  },
+  {
+    title: "Programmierung und Algorithmen",
+    start: "2023-10-12T17:00:00",
+    end: "2023-10-12T18:30:00",
+    classNames: ["missing-page"]
+  },
+  {
+    title: "Grundlagen und Diskrete Strukturen",
+    start: "2023-10-13T09:00:00",
+    end: "2023-10-13T10:30:00",
+    url: "https://ia.lu-dev.de/#/page/grundlagen%20und%20diskrete%20strukturen%2F23-10-13"
+  },
+  {
+    title: "Übung: Mathematik für Informatiker 1",
+    start: "2023-10-13T11:00:00",
+    end: "2023-10-13T12:30:00",
+    classNames: ["missing-page"]
+  }, 
 ];
 
 document.addEventListener("DOMContentLoaded", function () {