diff --git a/lib/ext/Syncroton/Model/AXMLEntry.php b/lib/ext/Syncroton/Model/AXMLEntry.php
--- a/lib/ext/Syncroton/Model/AXMLEntry.php
+++ b/lib/ext/Syncroton/Model/AXMLEntry.php
@@ -222,6 +222,31 @@
         return $dirty;
     }
 
+    /**
+     * Fix date-time string input
+     *
+     * @param string $date Date time string
+     *
+     * @return string
+     */
+    protected function _fixDateTimeString($date)
+    {
+        // Note: Some clients send date-time in local charset instead of ascii
+        // It is not supported by PHP DateTime constructor
+
+        $from = [
+            '١','٢','٣','٤','٥','٦','٧','٨','٩','٠', // arabic
+            '۱','۲','۳','۴','۵','۶','۷','۸','۹','۰', // persian
+        ];
+
+        $to = [
+            '1','2','3','4','5','6','7','8','9','0',
+            '1','2','3','4','5','6','7','8','9','0',
+        ];
+
+        return str_replace($from, $to, $date);
+    }
+
     /**
      *
      * @param string $element
@@ -284,7 +309,7 @@
                     break;
 
                 case 'datetime':
-                    $property = new DateTime((string) $xmlElement, new DateTimeZone('UTC'));
+                    $property = new DateTime($this->_fixDateTimeString((string) $xmlElement), new DateTimeZone('UTC'));
                     break;
 
                 case 'number':