diff --git a/application/Calendar/CalendarModel.php b/application/Calendar/CalendarModel.php
index 5ca1ca2ff..95ca6f81a 100644
--- a/application/Calendar/CalendarModel.php
+++ b/application/Calendar/CalendarModel.php
@@ -694,7 +694,7 @@ WHERE `TimerecordingCategory`.`hourday`!='1' AND `TimerecordingCategory`.`hourda
             if (($r->customer_info_type_text)) {
                 $customer_info_type_text = $r->customer_info_type_text;
             }
-            if ($r->customer_info_reminder_check) {
+            if ($r->customer_info_reminder_check || $r->customer_info_reminder_check == 0) {
                 $updateArray['customer_info_reminder'] = $r->customer_info_reminder_check;
             }
             $customerJson = array('customer_info_type' => $customer_info_type, 'customer_info_text' => $customer_info_text, 'customer_info_type_text' => $customer_info_type_text);
diff --git a/public/js/pages/Calendar/View.js b/public/js/pages/Calendar/View.js
index 5df62fe6d..fe98fbf28 100644
--- a/public/js/pages/Calendar/View.js
+++ b/public/js/pages/Calendar/View.js
@@ -409,7 +409,11 @@ document.addEventListener('DOMContentLoaded', function () {
                                     $('#customer').html('<option></option>');
                                 }
                                 if (data.data.customer_info_reminder.customer_info_reminder) {
-                                    $('#customer-info-reminder-check').prop('checked', true);
+                                    if (data.data.customer_info_reminder.customer_info_reminder == 1) {
+                                        $('#customer-info-reminder-check').prop('checked', true);
+                                    } else {
+                                        $('#customer-info-reminder-check').prop('checked', false);
+                                    }
                                 }
                                 $('#customer').select2({
                                     placeholder: "Kunden Suche",