JSFiddle - React, Tailwind, and code Playground

HTML

<ul id="events"></ul>

JavaScript

var events = [{
          "name": "My Event",
          "date": "10/21/2015"
        }, {
          "name": "Wedding",
          "date": "11/29/2015"
        }, {
          "name": "Birthday Party",
          "date": "01/09/2016"
        }, {
          "name": "Anniversary Party",
          "date": "09/19/2015"
        }, {
          "name": "Gala",
          "date": "08/14/2015"
        }, {
          "name": "New Years Eve Party",
          "date": "12/31/2015"
        }, {
          "name": "4th of July",
          "date": "07/04/2015"
        }, {
          "name": "Another Event",
          "date": "02/02/2016"
        }, {
          "name": "Trade Show",
          "date": "10/02/2015"
        }, {
          "name": "Meeting",
          "date": "04/09/2014"
        }];
    
    
        
    function convertToJSData(arr) {
      for (var i = 0; i < arr.length; i++) {
        // var from = "10-11-2011";
        var from = arr[i].date;
        var numbers = from.match(/\d+/g);
        var date = new Date(numbers[2], numbers[0] - 1, numbers[1]);
        arr[i].date = date;
      }
      console.log(arr[0].date);
      return arr;
    
    }
    
    
    function getByDate(data) {
      convertToJSData(data);
      var filterDate = new Date(2015, 09, 01);
      return data.filter(function (el) {
        return el.date >= filterDate;
      });
    }
    
    
    var filteredDates = getByDate(events);
    filteredDates.sort(function (a, b) {
      return a.date - b.date;
    });
    console.log(filteredDates.length); //returns 6
   
    
    
    var appendHTML = function (el) {
      var list = document.getElementById("events");
      for (var i = 0; i < filteredDates.length; i++) {
        var listItem = document.createElement('li');
        listItem.innerHTML = filteredDates[i].name;
        listItem.className = "event-list";
        list.appendChild(listItem);
      }
    };
    
    
    appendHTML(document.body);
    
    var deleteEvent = function (ev) {
...