Common\Core\Model::getUTCDate PHP Method

    public static function getUTCDate($format = null, $timestamp = null)
    {
        $format = $format !== null ? (string) $format : 'Y-m-d H:i:s';
        if ($timestamp === null) {
            return gmdate($format);
        }
        return gmdate($format, (int) $timestamp);
    }