diff --git a/Plan/common/src/main/resources/assets/plan/web/js/server-values.js b/Plan/common/src/main/resources/assets/plan/web/js/server-values.js
index 94c9ceb7e..ba9902b66 100644
--- a/Plan/common/src/main/resources/assets/plan/web/js/server-values.js
+++ b/Plan/common/src/main/resources/assets/plan/web/js/server-values.js
@@ -553,6 +553,7 @@ function loadHourlyUniqueAndNewGraph(json, error) {
 function loadServerCalendar(json, error) {
     if (json) {
         document.getElementById('calendar').innerText = '';
+        if (window.calendars.online_activity) window.calendars.online_activity.destroy();
         onlineActivityCalendar('#calendar', json.data, json.firstDay);
         document.getElementById('online-calendar-tab').addEventListener('click', function () {
             // Wrapping this in a 0ms setTimeout waits for all other event handlers
diff --git a/Plan/common/src/main/resources/assets/plan/web/server.html b/Plan/common/src/main/resources/assets/plan/web/server.html
index 713aea29b..cce3bea6e 100644
--- a/Plan/common/src/main/resources/assets/plan/web/server.html
+++ b/Plan/common/src/main/resources/assets/plan/web/server.html
@@ -1379,7 +1379,7 @@
         refreshingJsonRequest("../v1/graph?type=geolocation&server=${serverUUID}", loadGeolocationGraph, 'geolocations');
         refreshingJsonRequest("../v1/graph?type=uniqueAndNew&server=${serverUUID}", loadUniqueAndNewGraph, 'online-activity-overview');
         refreshingJsonRequest("../v1/graph?type=hourlyUniqueAndNew&server=${serverUUID}", loadHourlyUniqueAndNewGraph, 'online-activity-overview');
-        jsonRequest("../v1/graph?type=serverCalendar&server=${serverUUID}", loadServerCalendar, 'online-activity-overview');
+        refreshingJsonRequest("../v1/graph?type=serverCalendar&server=${serverUUID}", loadServerCalendar, 'online-activity-overview', true);
         refreshingJsonRequest("../v1/graph?type=punchCard&server=${serverUUID}", loadPunchCard, 'online-activity-overview');
 
         setLoadingText('Sorting players table..');