diff --git a/public/js/pages/Calendar/View.js b/public/js/pages/Calendar/View.js
index 04b427161..178a897ba 100644
--- a/public/js/pages/Calendar/View.js
+++ b/public/js/pages/Calendar/View.js
@@ -171,6 +171,17 @@ document.addEventListener('DOMContentLoaded', function () {
                 return new Promise(resolve => setTimeout(resolve, ms));
             }
 
+            const eventSources = [];
+            eventSources.push(userevents);
+            eventSources.push(otherevents);
+            if (visibleCalendars.includes(997)) {
+                eventSources.push(holiDays);
+            }
+            if (visibleCalendars.includes(998)) {
+                eventSources.push(birthdays);
+            }
+
+
             calendar = new FullCalendar.Calendar(calendarEl, {
                 schedulerLicenseKey: 'CC-Attribution-NonCommercial-NoDerivatives',
                 timeZone: 'UTC',
@@ -333,14 +344,12 @@ document.addEventListener('DOMContentLoaded', function () {
                             let accepted = data.data.accepted.accepted;
                             if (accepted) {
                                 const accept = JSON.parse(accepted);
-                                const datetime=new Date(accept.time * 1000);
+                                const datetime = new Date(accept.time * 1000);
                                 const germanDateTime = datetime.toLocaleString('de-DE');
                                 $('.accepted-status').addClass('fa-circle-check');
                                 $('.accepted-status').prop('title', accept.user + ' (' + germanDateTime + ')');
                                 $('.event-accepted').text('Akzeptiert');
-                            }
-                            else
-                            {
+                            } else {
                                 $('.accepted-status').addClass('fa-circle-info');
                                 $('.accepted-status').prop('title', 'Termin wurde noch nicht bestätigt');
                                 $('.event-accepted').text('Offen');
@@ -613,7 +622,7 @@ document.addEventListener('DOMContentLoaded', function () {
                 navLinks: 'true',
                 events: [],
                 height: 800,
-                eventSources: [userevents, otherevents, holiDays, birthdays],
+                eventSources: eventSources,
                 resourceOrder: 'order',
                 resources: resources,
             });
@@ -1734,7 +1743,13 @@ Xinon GMbH`;
 
                     }
                 });
-                calendar.addEventSource(userevents)
+                calendar.addEventSource(userevents);
+                if (visibleCalendars.includes(998)) {
+                    calendar.addEventSource(birthdays);
+                }
+                if (visibleCalendars.includes(997)) {
+                    calendar.addEventSource(holiDays);
+                }
             }
             ;
         });