update application/admin/model/Field.php.

application/admin/model/Field.php

@@ -1110,7 +1110,7 @@ class Field extends Model
                     $setting = explode(chr(10), $v['setting']);
                     if ($v['form_type'] == 'checkbox') $default_value = $v['default_value'] ? explode(',', $v['default_value']) : [];
                 }
-                if ($v['field'] == 'order_date') {
+                if ($v['field'] == 'order_date' || $v['field'] == 'return_time') {
                     $default_value = date('Y-m-d', time());
                 }