Как сделать подгрузку disabled date сразу?

$(document).ready(function(){ 
 
$('.add-tarif__tabs li').each(function () { 
        var tab_id = $(this).find('a').attr('href'); 
        var period = $(tab_id); 
        var start = period.find('.startDate'); 
        var end = period.find('.endDate'); 
        startCalendar(start, end); 
    }); 
 
    var addTarifCount = 0; 
     
    $('.add-tarif__add-period').on('click', function () { 
 
        addTarifCount += 1; 
 
        var startId = "start_" + addTarifCount; 
        var endId = "end_" + addTarifCount; 
 
        $(this).before('<div class="add-tarif__box"><h4 class="title">Период действия</h4><div class="reservation-calendar add-tarif__period-date line">' + 
            '<div class="reservation-calendar__item"><input class="start startDate" type="text" readonly="" id="'+startId+'">' + 
            '</div>' + 
            '<div class="reservation-calendar__item"><input class="start endDate" type="text" readonly="" id="'+endId+'">' + 
            '</div></div>' + 
            '</div></div></div></div>'); 
 
        startCalendar($("#"+startId), $("#"+endId)); 
 
    }); 
 
    function startCalendar(start, end) { 
 
        var disabledTarifDates = ["17-07-2018"]; 
 
        console.log('dis', disabledTarifDates); 
 
        var $starttarifDate = start; 
        var $endtarifDate = end; 
 
        $starttarifDate.datepicker({ 
            inline: false, 
            range: true, 
            toggleSelected: true, 
            minDate: new Date(), 
            multipleDatesSeparator: ",", 
            dateFormat: 'dd-mm-yyyy', 
            onSelect: function (fd, date) { 
                if(date){ 
                    var arrDate = fd.split(","); 
                    $starttarifDate.val(arrDate[0]); 
                    $endtarifDate.val(arrDate[1]); 
                    if(arrDate[1]){ 
                        $('.datepicker').css("left", "-100000px"); 
                        $starttarifDate.blur(); 
                    } 
                    $endtarifDate.on('click', function () { 
                        $starttarifDate.datepicker().val(arrDate[0]).data('datepicker').show(); 
                    }); 
 
                    disabledTarifDates.forEach(function () { 
                        console.log(arrDate); 
                        var disabledTarifDatesNew = arrDate; 
                        console.log(disabledTarifDates) 
                    }) 
 
                } 
            }, 
            onRenderCell: function(date, cellType) { 
                var formatted = getFormattedDate1(date); 
                if (cellType == 'day') { 
                    var returnDay = { 
                        disabled: false 
                    }; 
                    var selectedDate = disabledTarifDates.filter(function(date){ 
                        return date == formatted; 
                    }).length; 
                    if( selectedDate > 0 ){ 
                        returnDay = { 
                            classes: 'add-to-disable-day', 
                            disabled: true 
                        }; 
                    } 
                    return returnDay; 
                } 
            } 
        }); 
    } 
 
    function getFormattedDate1(date) { 
        var year = date.getFullYear(), 
            month = date.getMonth() + 1, 
            date = date.getDate(); 
        return date + '-' + month + '-' + year ; 
    } 
 
});

<link href="https://cdnjs.cloudflare.com/ajax/libs/air-datepicker/2.2.3/css/datepicker.css" rel="stylesheet"/> 
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js"></script> 
<script src="https://cdnjs.cloudflare.com/ajax/libs/air-datepicker/2.2.3/js/datepicker.js"></script> 
 
<div class="add-tarif__period-item tabs-panel is-active" id="panel1" role="tabpanel" aria-labelledby="panel1-label"> 
  <div class="add-tarif__box"> 
    <h4 class="title">Период действия</h4> 
    <div class="reservation-calendar add-tarif__period-date line"> 
      <div class="reservation-calendar__item"> 
        <input class="start startDate" type="text" readonly="" id="startPeriod1"> 
      </div> 
      <div class="reservation-calendar__item"> 
        <input class="start endDate" type="text" readonly="" id="endPeriod1"> 
      </div> 
    </div> 
  </div> 
  <button class="add-tarif__add-period" type="button">Добавить период</button> 
</div>