In jquery fullcalendar, can I add a new event without refreshing the whole month?

Here is the code that I use:

function addCalanderEvent(id, start, end, title, colour)
{
    var eventObject = {
    title: title,
    start: start,
    end: end,
    id: id,
    color: colour
    };

    $('#calendar').fullCalendar('renderEvent', eventObject, true);
    return eventObject;
}

to add events on the client side into the fullCalendar you can call:

var myCalendar = $('#my-calendar-id'); 
myCalendar.fullCalendar();
var myEvent = {
  title:"my new event",
  allDay: true,
  start: new Date(),
  end: new Date()
};
myCalendar.fullCalendar( 'renderEvent', myEvent );

I haven't test this code, but this should get the job done.

How about this?

$("#calendar").fullcalendar('addEventSource', yourEvent);