how to refresh the fullcalendar events?

I'm creating an application with laravel and fullcalendar and I want to create a new event when I hit a button and let it see immediately, I could make it create it without problems, the question is that it is not updated until it recharges the page. This is my code:

$('#guardar').click(function(){
     $.ajax({
     url:"/calendar/crear",
     type:"POST",
      data:$("#formulario_guardar").serialize(),
   }).done(function(uno){
     $('#exampleModal').modal('hide');
    $("#calendar").fullCalendar( 'refetchEvents' );
   });

It is not updated, if someone knows why I appreciate the information.