diff --git a/Layout/default/Calendar/View.php b/Layout/default/Calendar/View.php
index 6a232d25a..49c362364 100644
--- a/Layout/default/Calendar/View.php
+++ b/Layout/default/Calendar/View.php
@@ -120,7 +120,8 @@ endforeach;
                                         class="fa-duotone fa-solid fa-phone-volume fa-calendar-call fa-calendar-call-search"></i>
                             </button>
                             <button title="Abgesagte Termine" data-eventcancelled="1"
-                                    class="btn btn-light btn-light-search"><i class="fa-duotone fa-solid fa-calendar-symbol fa-calendar-circle-exclamation"></i>
+                                    class="btn btn-light btn-light-search"><i
+                                        class="fa-duotone fa-solid fa-calendar-symbol fa-calendar-circle-exclamation"></i>
                             </button>
 
 
@@ -664,16 +665,20 @@ endforeach;
                             <label for="location" class="col-form-label fw-medium">Kunde</label>
                             <div class="form-check ml-3" style="margin-top: 7px;display:inline-block">
                                 <div class="d-inline-block">
-                                    <input class="form-check-input eventmodal-checkbox hide-cancelled" type="checkbox" value=""
+                                    <input class="form-check-input eventmodal-checkbox hide-cancelled" type="checkbox"
+                                           value=""
                                            id="customer-info-check">
-                                    <label class="form-check-label fw-medium checkbox-label hide-cancelled" for="customer-info-check">
+                                    <label class="form-check-label fw-medium checkbox-label hide-cancelled"
+                                           for="customer-info-check">
                                         Info senden
                                     </label>
                                 </div>
                                 <div class="d-inline-block">
-                                    <input class="form-check-input eventmodal-checkbox show-cancelled" type="checkbox" value=""
+                                    <input class="form-check-input eventmodal-checkbox show-cancelled" type="checkbox"
+                                           value=""
                                            id="customer-info-check-cancelled">
-                                    <label class="form-check-label fw-medium checkbox-label show-cancelled" for="customer-info-check-cancelled">
+                                    <label class="form-check-label fw-medium checkbox-label show-cancelled"
+                                           for="customer-info-check-cancelled">
                                         Absage senden
                                     </label>
                                 </div>
@@ -689,7 +694,8 @@ endforeach;
                                     </div>
                                 </div>
                                 <div class="d-inline-block ml-4">
-                                    <input class="form-check-input eventmodal-checkbox hide-cancelled" type="checkbox" value=""
+                                    <input class="form-check-input eventmodal-checkbox hide-cancelled" type="checkbox"
+                                           value=""
                                            id="customer-info-reminder-check">
                                     <label class="form-check-label fw-medium checkbox-label hide-cancelled"
                                            for="customer-info-reminder-check">
@@ -754,6 +760,20 @@ endforeach;
 
                     </div>
                 </div>
+                <div class="delete-old-div">
+                    <div class="row mt-2 mb-3 justify-content-center">
+
+                        <div class="form-check" style="margin-top: 7px;">
+
+                            <input style="    margin-top: 7px;" class="form-check-input eventmodal-checkbox" type="checkbox" value=""
+                                   id="delete-old-entry"> <label class="form-check-label fw-medium checkbox-label"
+                                                                 for="delete-old-entry">
+                                <span style="color:#a20909;font-size: 17px;">Alten eintrag löschen</span>
+                            </label>
+
+                        </div>
+                    </div>
+                </div>
 
                 <div class="modal-footer">
                     <button type="button" class="btn btn-success hide-cancelled" id="add-event">Hinzufügen</button>
@@ -766,16 +786,24 @@ endforeach;
                         Absagen
                     </button>
 
-                    <button style="display:none" type="button" class="btn btn-success show-update hide-cancelled" id="update-event">
+                    <button style="display:none" type="button" class="btn btn-success show-update hide-cancelled"
+                            id="update-event">
                         Speichern
                     </button>
-                    <button style="display:none" type="button" class="btn btn-primary show-update hide-cancelled" id="cancel-event">
+                    <button style="display:none" type="button" class="btn btn-primary show-update hide-cancelled"
+                            id="cancel-event">
                         Termin Absage
                     </button>
-                    <button style="display:none" type="button" class="btn btn-danger show-update hide-cancelled" id="delete-event">
+                    <button style="display:none" type="button" class="btn btn-primary show-update hide-cancelled"
+                            id="copy-event">
+                        Kopieren
+                    </button>
+                    <button style="display:none" type="button" class="btn btn-danger show-update hide-cancelled"
+                            id="delete-event">
                         Löschen
                     </button>
-                    <button style="display:none" type="button" class="btn btn-danger show-cancelled" id="cancelled-event">
+                    <button style="display:none" type="button" class="btn btn-danger show-cancelled"
+                            id="cancelled-event">
                         Absagen
                     </button>
                     <button type="button" class="btn btn-secondary" data-dismiss="modal">Abbrechen</button>
diff --git a/application/Calendar/CalendarModel.php b/application/Calendar/CalendarModel.php
index 0bc7d3a26..c5bad69ac 100644
--- a/application/Calendar/CalendarModel.php
+++ b/application/Calendar/CalendarModel.php
@@ -959,8 +959,11 @@ WHERE `TimerecordingCategory`.`hourday`!='1' AND `TimerecordingCategory`.`hourda
         $data['create'] = time();
         $data['edit_by'] = 89;
         $data['create_by'] = 89;
-
         $db->insert("TheTool_CalendarQueue", $data);
+        if ($r->delete_old_entry) {
+            CalendarModel::deleteCalendarOldEvent($r->delete_old_entry);
+            die();
+        }
     }
 
     public static function insertCalendarEventAttachmentTemp($name, $contantType, $content, $size, $newkey)
@@ -1021,6 +1024,36 @@ WHERE `TimerecordingCategory`.`hourday`!='1' AND `TimerecordingCategory`.`hourda
         die();
     }
 
+    public static function deleteCalendarOldEvent($id)
+    {
+        date_default_timezone_set('Europe/Berlin');
+        header('Content-Type: application/json');
+        $db = self::dbKalender();
+
+        $res = $db->select("cal_events", 'id,microsoft_id,user_id,calendar_id', "id = '" . $id . "' LIMIT 1");
+        if ($db->num_rows($res)) {
+            $result = $db->fetch_object($res);
+            $rescal = $db->select("cal_calendars", "id,ms_user_id", "id = '" . $result->calendar_id . "' LIMIT 1");
+            if ($db->num_rows($res)) {
+                $resultcal = $db->fetch_object($rescal);
+                $microsoft_user_id = $resultcal->ms_user_id;
+                var_dump($resultcal);
+            }
+            $data = [];
+            $data['ms_user_id'] = $microsoft_user_id;
+            $data['ms_event_id'] = $result->microsoft_id;
+            $data['type'] = 'd';
+            $data['status'] = 'p';
+            $data['edit'] = time();
+            $data['create'] = time();
+            $data['edit_by'] = 89;
+            $data['create_by'] = 89;
+            $db->insert("TheTool_CalendarQueue", $data);
+        }
+        $db->delete("cal_events", "id = '" . $id . "'");
+        die();
+    }
+
     public static function cancelCalendarEvent($r, $me)
     {
         $id = $r->id;
diff --git a/public/js/pages/Calendar/View.js b/public/js/pages/Calendar/View.js
index 40163d16b..d3faac38e 100644
--- a/public/js/pages/Calendar/View.js
+++ b/public/js/pages/Calendar/View.js
@@ -722,6 +722,7 @@ document.addEventListener('DOMContentLoaded', function () {
                             $('#location').val(info.event.extendedProps.location);
                             // $('#description').val(info.event.extendedProps.description);
                             $('#delete-event').data('id', info.event.id);
+                            $('#copy-event').data('id', info.event.id);
                             $('#update-event').data('id', info.event.id);
                             $('#cancel-event').data('id', info.event.id);
                             $('#cancelled-event').data('id', info.event.id);
@@ -1295,6 +1296,9 @@ $(document).ready(function () {
         $(document).off('focusin.modal');
         $('.hide-cancelled').show();
         $('.show-cancelled').hide();
+        $('#delete-old-entry').val('');
+        $('#delete-old-entry').prop('checked', false);
+        $('.delete-old-div').hide();
         $('#name-col').removeClass('col-9').addClass('col-6');
         $('.attachment-div').empty();
         $('#reminder').val('NULL');
@@ -1424,6 +1428,11 @@ $(document).ready(function () {
         if ($('#allday').is(':checked')) {
             allday = 1;
         }
+        let delete_old_entry = '';
+        if ($('#delete-old-entry').is(':checked')) {
+            delete_old_entry = $('#delete-old-entry').val()
+        }
+
         if ($('#customer-info-check').is(':checked')) {
             customer_info_check = 1;
         }
@@ -1483,6 +1492,7 @@ $(document).ready(function () {
             customer_info_type: customer_info_type,
             customer_info_type_text: customer_info_type_text,
             customer_info_reminder_check: customer_info_reminder_check,
+            delete_old_entry: delete_old_entry,
             newkey: newkey
         }, function (data) {
 
@@ -1722,6 +1732,37 @@ $(document).ready(function () {
             $('#EventModal').modal('hide');
         }
     });
+    $('body').on('click', '#copy-event', function () {
+        let id = $(this).data('id');
+        $('#EventModalLabel .fa-calendar-symbol').addClass('fa-calendar-circle-plus');
+        $('#EventModalLabel .fa-calendar-symbol').removeClass('fa-calendar-lines-pen');
+        $('#EventModalLabel .fa-calendar-symbol').removeClass('fa-calendar-circle-exclamation');
+        $('#EventModalLabel span').text('Termin erstellen');
+
+
+        $('#calendar-users').prop("disabled", false);
+        if ($('#update-event').is(':visible')) {
+            $('#delete-old-entry').val(id);
+            $('.delete-old-div').show();
+        } else {
+            var $input = $('#name');
+            var text = $input.val();
+            var pos = text.indexOf(':');
+            if (pos !== -1) {
+                var neuerText = text.substring(pos + 1).trim();
+                $input.val(neuerText);
+            }
+            $('#busy').val('1');
+        }
+        $('.hide-cancelled').show();
+        $('.show-cancelled').hide();
+        $('.show-update').hide();
+        $('.show-attendee').hide();
+        $('.event-organizer-div').hide();
+        if ($('#type').val() != 5) {
+            $('.ticket-div').hide();
+        }
+    });
 
     $('body').on('change', '#allday', function () {
         if ($(this).is(':checked')) {