Default date format in oOracle is DD-MON-RR (25-JAN-18). With that output, we can't using date formatting. Too solve this issue, we must change date format oracle like date commonly using ```sql ALTER SESSION SET NLS_DATE_FORMAT= = ... ``` Add this script inside your database connection file ```php
<?php

return [
'class' => 'yii\db\Connection',
'dsn' => 'oci:host=127.0.0.1:1521/XE',