Disable weekend and enable days with Fullcalendar plugin Jquery

I'm using the fullcalendar.js plugin

How would you like to leave the weekends disabled and also leave enabled only 15 days counting today's date?

I have this code with the fullcalendar.js plugin

JS

$(document).ready(function() {
    var calendar = $('#calendar').fullCalendar({
        header: {
            left: 'prev,next today',
            center: 'title',
            right: 'agendaWeek,agendaDay'
        },
        defaultView: 'agendaWeek',
        editable: true,
        selectable: true,
        allDaySlot: false,
        weekends: false,
        validRange: {
            start: moment().day(), // data atual
            end: moment().add(15, 'days') // data atual + 14 (15 com a data atual)
        },
        viewRender: function(i) {
            var ini = moment();
            if (ini >= i.start && ini <= i.end) {
                $(".fc-prev-button")
                    .prop('disabled', true)
                    .addClass('fc-state-disabled');
            } else {
                $(".fc-prev-button")
                    .removeClass('fc-state-disabled')
                    .prop('disabled', false);
            }
        },

        events: "index.php?view=1",


        eventClick: function(event, jsEvent, view) {
            endtime = $.fullCalendar.moment(event.end).format('h:mm');
            starttime = $.fullCalendar.moment(event.start).format('dddd, MMMM Do YYYY, h:mm');
            var mywhen = starttime + ' - ' + endtime;
            $('#modalTitle').html(event.title);
            $('#modalWhen').text(mywhen);
            $('#eventID').val(event.id);
            $('#calendarModal').modal();
        },

        //header and other values
        select: function(start, end, jsEvent) {
            endtime = $.fullCalendar.moment(end).format('h:mm');
            starttime = $.fullCalendar.moment(start).format('dddd, MMMM Do YYYY, h:mm');
            var mywhen = starttime + ' - ' + endtime;
            start = moment(start).format();
            end = moment(end).format();
            $('#createEventModal #startTime').val(start);
            $('#createEventModal #endTime').val(end);
            $('#createEventModal #when').text(mywhen);
            $('#createEventModal').modal('toggle');
        },
        eventDrop: function(event, delta) {
            $.ajax({
                url: 'index.php',
                data: 'action=update&title=' + event.title + '&start=' + moment(event.start).format() + '&end=' + moment(event.end).format() + '&id=' + event.id,
                type: "POST",
                success: function(json) {
                    //alert(json);
                }
            });
        },
        eventResize: function(event) {
            $.ajax({
                url: 'index.php',
                data: 'action=update&title=' + event.title + '&start=' + moment(event.start).format() + '&end=' + moment(event.end).format() + '&id=' + event.id,
                type: "POST",
                success: function(json) {
                    //alert(json);
                }
            });
        }
    });

    $('#submitButton').on('click', function(e) {
        // We don't want this to act as a link so cancel the link action
        e.preventDefault();
        doSubmit();
    });

    $('#deleteButton').on('click', function(e) {
        // We don't want this to act as a link so cancel the link action
        e.preventDefault();
        doDelete();
    });

    function doDelete() {
        $("#calendarModal").modal('hide');
        var eventID = $('#eventID').val();
        $.ajax({
            url: 'index.php',
            data: 'action=delete&id=' + eventID,
            type: "POST",
            success: function(json) {
                if (json == 1)
                    $("#calendar").fullCalendar('removeEvents', eventID);
                else
                    return false;


            }
        });
    }

    function doSubmit() {
        $("#createEventModal").modal('hide');
        var title = $('#title').val();
        var startTime = $('#startTime').val();
        var endTime = $('#endTime').val();

        $.ajax({
            url: 'index.php',
            data: 'action=add&title=' + title + '&start=' + startTime + '&end=' + endTime,
            type: "POST",
            success: function(json) {
                $("#calendar").fullCalendar('renderEvent', {
                        id: json.id,
                        title: title,
                        start: startTime,
                        end: endTime,
                    },
                    true);
            }
        });

    }
});

You are not leaving the 15 days enabled with today's date

header:{
                left: 'prev,next today',
                center: 'title',
                right: 'agendaWeek,agendaDay'
            },
            defaultView: 'agendaWeek',
            editable: true,
            selectable: true,
            allDaySlot: false,
            weekends: false,
            validRange: {
   start: moment().day(),         // data atual
   end:  moment().add(15, 'days') // data atual + 14 (15 com a data atual)
},
viewRender: function(i){
   var ini = moment();
   if(ini >= i.start && ini <= i.end){
      $(".fc-prev-button")
      .prop('disabled', true) 
      .addClass('fc-state-disabled'); 
   }else{
      $(".fc-prev-button")
      .removeClass('fc-state-disabled')
      .prop('disabled', false); 
   }
},