diff --git a/scripts/calendar/sync_calender_rights.php b/scripts/calendar/sync_calender_rights.php
new file mode 100644
index 000000000..88f98a4c0
--- /dev/null
+++ b/scripts/calendar/sync_calender_rights.php
@@ -0,0 +1,109 @@
+<?php
+
+//require 'vendor/autoload.php';
+require("../../config/config.php");
+
+define('FRONKDB_SQLDEBUG', false);
+error_reporting(E_ALL & ~(E_NOTICE | E_STRICT | E_DEPRECATED));
+
+require_once(LIBDIR . "/mvcfronk/mfRouter/mfRouter.php");
+require_once(LIBDIR . "/mvcfronk/mfBase/mfBaseModel.php");
+require_once(LIBDIR . "/mvcfronk/mfBase/mfBaseController.php");
+
+$me = new User(154);
+define("INTERNAL_USER_ID", $me->id);
+define("INTERNAL_USER_USERNAME", $me->username);
+
+$calendar = CalendarModel::search(array("checkSubscriptions" => 1));
+$adminUser = array(89, 173, 167, 8, 6, 9, 5,123);
+
+
+foreach ($calendar as $cal) {
+    $allCalendar[$cal->go_calendar_id] = $cal->user_id;
+}
+
+foreach ($calendar as $cal) {
+    $update = 0;
+    $allCalendarUser = $allCalendar;
+    unset($newrights);
+    if (in_array($cal->user_id, $adminUser)) {
+        $admin = 1;
+    } else {
+        $admin = 0;
+    }
+
+    foreach ($allCalendarUser as $key => $value) {
+        if ($admin == 1 || $key == $cal->go_calendar_id) {
+            $newrights[$key] = "all";
+        } else {
+            $newrights[$key] = "read";
+        }
+    }
+    if (json_encode($newrights) != $cal->rights) {
+        $cal->update(array("rights" => json_encode($newrights)));
+        $update = 1;
+    }
+
+    if ($cal->colors) {
+        $stdColors = CalendarModel::$standardCalendarColors;
+        $colorsArray = json_decode($cal->colors, true);
+        $colors = $colorsArray;
+        foreach ($allCalendarUser as $key => $value) {
+            if ($colors[$key]) {
+                unset($colors[$key]);
+            } else {
+                $colorsArray[$key]['bgcolor'] = $stdColors[$key];
+                $colorsArray[$key]['txtcolor'] = "#000000";
+            }
+        }
+        if ($colors) {
+            foreach ($colors as $key => $value) {
+                if ($key != "998" && $key != "997") {
+                    unset($colorsArray[$key]);
+                }
+            }
+        }
+
+        if (json_encode($colorsArray) != $cal->colors) {
+            $cal->update(array("colors" => json_encode($colorsArray)));
+            $update = 1;
+        }
+
+    }
+    if ($cal->groups) {
+        $groupArray = json_decode($cal->groups, true);
+        $groups = $groupArray;
+        foreach ($groups as $key => $value) {
+            foreach ($value["calendars"] as $key2 => $value2) {
+                if ((!$allCalendarUser[$value2['calendar_id']] && $value2['calendar_id'] != 997 && $value2['calendar_id'] != 998)) {
+                    unset($groupArray[$key]["calendars"][$key2]);
+                } else {
+                    unset($allCalendarUser[$value2['calendar_id']]);
+                }
+
+
+            }
+        }
+        if ($allCalendarUser) {
+            foreach ($groups as $key => $value) {
+                if ($value['name'] == "Persönlich") {
+                    foreach ($allCalendarUser as $key2 => $value2) {
+                        $groupArray[$key]["calendars"][] = array("calendar_id" => "$key2", "checked" => 0, "origin" => 1);
+                    }
+                }
+            }
+        }
+        if (json_encode($groupArray, JSON_UNESCAPED_UNICODE) != $cal->groups) {
+            echo "groups";
+            $cal->update(array("groups" => json_encode($groupArray, JSON_UNESCAPED_UNICODE)));
+            $update = 1;
+        }
+    }
+
+    if ($update == 1) {
+        echo "save" . $cal->id . "\n";
+
+        $cal->save();
+    }
+
+}
\ No newline at end of file