diff --git a/assets/js/components/presence/PresenceHelper.js b/assets/js/components/presence/PresenceHelper.js
index ccce0fe2..da7a13a4 100644
--- a/assets/js/components/presence/PresenceHelper.js
+++ b/assets/js/components/presence/PresenceHelper.js
@@ -56,11 +56,33 @@ class ForezPresenceHelper {
      * @param {number} day 
      */
     static async DelDay(groupID, year, month, day) {
-        await ws("forez_presence/add_day", {
+        await ws("forez_presence/del_day", {
             group: groupID,
             year: year,
             month: month,
             day: day
         })
     }
+
+    static async UpdateEvents(groupID, oldStart, oldEnd, newStart, newEnd) {
+        const newDays = new Set(getDaysOfRange(newStart, newEnd).map(el => el.getTime()));
+        const oldDays = new Set(getDaysOfRange(oldStart, oldEnd).map(el => el.getTime()));
+
+        for (const el of newDays) {
+            if(oldDays.has(el)) {
+                newDays.delete(el)
+                oldDays.delete(el)
+            }
+        }
+
+        for(const newEl of newDays) {
+            const date = new Date(newEl);
+            await this.AddDay(groupID, date.getFullYear(), date.getMonth() + 1, date.getDate())
+        }
+
+        for(const oldEl of oldDays) {
+            const date = new Date(oldEl);
+            await this.DelDay(groupID, date.getFullYear(), date.getMonth() + 1, date.getDate())
+        }
+    }
 }
\ No newline at end of file
diff --git a/assets/js/pages/groups/pages/presence.js b/assets/js/pages/groups/pages/presence.js
index 38b2ba3c..97be100b 100644
--- a/assets/js/pages/groups/pages/presence.js
+++ b/assets/js/pages/groups/pages/presence.js
@@ -48,19 +48,13 @@ class GroupPresencePage {
             events: calEvents,
 
             // Update events
-            eventResize: function(info) {
-                const newDays = new Set(getDaysOfRange(info.event.start, info.event.end).map(el => el.getTime()));
-                const oldDays = new Set(getDaysOfRange(info.oldEvent.start, info.oldEvent.end).map(el => el.getTime()));
-
-                for (const el of newDays) {
-                    if(oldDays.has(el)) {
-                        newDays.delete(el)
-                        oldDays.delete(el)
-                    }
+            eventResize: async function(info) {
+                try {
+                    await ForezPresenceHelper.UpdateEvents(group.id, info.oldEvent.start, info.oldEvent.end, info.event.start, info.event.end)
+                } catch(e) {
+                    console.error(e);
+                    notify(tr("Failed to update presence!"), "danger")
                 }
-
-                console.info("add", newDays)
-                console.info("del", oldDays)
             }
         });