Change the query to PDO

I have the following code that generates a JSON file, it works fine, but I must change it to send the data between the controller and the model.

include "conex.php";

$sql= "select * from timetables";
$query = $con->query($sql);

// Fetch tha data from the database 
$timetables = array();
while ($row = mysqli_fetch_array($query)) {
    $timetable = new stdClass();
    $timetable->name = $row{'name'};
    $timetable->image = $row{'image'};
    $timetable->date = date('j', strtotime($row{'date'})); // date : type DATE. For example: 2016-09-07
    $timetable->month = date('n', strtotime($row{'date'}));
    $timetable->year = date('Y', strtotime($row{'date'}));
    $timetable->start_time = $row{'start_time'} ? date('H:i', strtotime($row{'start_time'})) : ''; // start_time : Must be 24 hour format. For example: 18:00
    $timetable->end_time = $row{'end_time'} ? date('H:i', strtotime($row{'end_time'})) : ''; // end_time : Must be 24 hour format. For example: 20:30
    $timetable->color = $row{'color'};
    $timetable->description = utf8_encode(nl2br($row{'description'}));

    array_push($timetables, $timetable);
}

echo json_encode($timetables);

I did the following but with that I can not divide the date field as it happens in the previous code.

class IdController{
    public function idController(){
        $id_URL = $_GET["id"];
        $respuesta = IdModels::idModel($id_URL, "timetables");    
        echo json_encode($respuesta);               
    }
}

I need in the controller to be able to divide the date like this:

$timetable->date = date('j', strtotime($row{'date'})); 
$timetable->month = date('n', strtotime($row{'date'})); 
$timetable->year = date('Y', strtotime($row{'date'})); 

How could I do it?

This is the Model:

class IdModels{
    public function idModel($id, $tabla){
        $stmt = Connex::conect()->prepare("SELECT name, image, date, start_time, end_time, color, description FROM $tabla WHERE court = $id");
        $stmt -> execute();
        return $stmt -> fetchAll();
        $stmt -> close();
    }
}