img = "images/cross.png";
 $('#calendar').fullCalendar({
                contentHeight: 380,
                weekNumbers: false,
                fixedWeekCount: false,
                eventLimit: true, // allow "more" link when too many events
                events: feeder,
                businessHours: true,
                aspectRatio: 1,
                defaultView: 'month',
                showNonCurrentDates: false,
                validRange: {
                    start: '2018-08-01',
                    end: moment()
                },

                eventRender: function (event, eventElement, view) {

                    if (event.imageurl) {
                        eventElement.find("div.fc-content").html("<img src='" + event.imageurl + "' width='25' height='28'>");
                    } else {

                        eventElement.html("<img src='" + img + "' width='25' height='28'>");
                    }

                },
                dayRender: function (date, cell) {

                    cell.html("<img src='" + img + "' width='15' height='20'>");
                }});