Issue on Safari v14.0.3

[halhwadi]

Datepicker works fine on chrome and edge but on Safari it shows error says:
"options.event" must only contains valid Javascript Dates object, even though date are js date objects, please find JS code for your reference :
`<script>

$(document).ready(function (){

$.ajax({
    
    url:"{% url 'calendar' %}",
    success: function (dates) {
    dates = dates['dates'];
    selector = document.getElementById("cal_img");
    
        var year;
        var month;
        var day;
        var year_cal;
        var month_cal;
        var day_cal;
        var events_list = [];
        var date_lookup;

        if (dates.length < 1){
            events_list = [new Date(0000, 00, 00)];
        }
        else {
        for (let i = 0; i < dates.length; i++){
                dates[i] = dates[i].replace(/-/g,",");
                events_list[i] = new Date(dates[i]);  
        }
    }

        const event = datepicker(selector, { position: 'br',
        onSelect: (date) => {
            year_cal = date.dateSelected.getFullYear();
            month_cal = date.dateSelected.getMonth();
            day_cal = date.dateSelected.getDate();
        

            date_lookup = year_cal.toString().concat(",").concat((month_cal + 1).toString().concat(",").concat(day_cal.toString()));

            for (let i = 0; i < dates.length; i++){
                year = new Date(dates[i]).getFullYear();
                month = new Date(dates[i]).getMonth();
                day = new Date(dates[i]).getDate();
                

                if ((year == year_cal) && (month == month_cal) && (day == day_cal)){
                    window.location.href = "{% url 'calendar_loads_list' date_lookup=12345 %}".replace(/12345/,date_lookup.toString());
            }
        }
        
        },
        events:events_list
        
        })
            }
        })
    
    })

</script>`