Full Calendar does not respect end date

I created a calendar using Full Calendar, it displays the events, but does not respect the end date, always ends the event the day before, but only on the display. I do not know if this duration field is being respected, but should respect the end field. Here is the code that searches and mounts json:

$conexao = new PDO('', '', '');
  if(!$conexao){
  echo "<script> window.location.replace('../erro.html'); </script>"; 
}

$consulta = $conexao->query("SELECT id, title, start, end, datediff(ADDDATE( end, INTERVAL 1 DAY), start) as duration FROM eventos");
    while ($linha = $consulta->fetch(PDO::FETCH_ASSOC)) { 
        $vetor[] = $linha;        
     }
    //Passando vetor em forma de json
    echo json_encode($vetor);

Thank you if anyone has any suggestions on how to fix it.

js:

<script>
    $(document).ready(function() {  

            //CARREGA CALENDÁRIO E EVENTOS DO BANCO
            $('#calendario').fullCalendar({
                header: {
                    right: 'prev,next',
                    center: 'title',
                    left: 'month,agendaWeek,agendaDay'
                },
                //defaultDate: '2016-01-12',
                editable: true,
                eventLimit: true, 
                events: 'eventos.php',           
                eventColor: '#0277BD'
            }); 
    }); 

    </script>