JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-mockjax/1.6.2/jquery.mockjax.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.13.0/moment.js"></script>
<table id="x"></table>

JavaScript

// Ajax mockup
$.mockjax({
    url: "/SomeUrlBeginninWithSlash",
    contentType: "application/json;odata=verbose",
    responseText: {
        d: {
            results: [{
                ID: "1",
                Description: "Test1",
                Date: "2016-05-02 09:45"
            }, {
                ID: "2",
                Description: "Test2",
                Date: "2016-05-02 10:45"
            }, {
                ID: "3",
                Description: "Test3",
                Date: "2016-05-03 11:45"
            }, {
                ID: "4",
                Description: "Test4",
                Date: "2016-05-03 11:45",
            }]
        }
    }
});
      var items_by_date  = {}; // declare an object that will have date indexes
      $.ajax({url:"/SomeUrlBeginninWithSlash",
          dataType: 'json',
          cache: false,
          success: function (data) {
					console.log("SUCCESS",data);	
					drawTable(data.d.results);
          }
      });

 var drawTable = function(data) {
  // First sort the entries by date:
  data = data.sort(function(a, b) {
    return (moment(a.Date) - moment(b.Date));
  });

  // Find the date range to work with by looking at each end of the array:
  var firstDate = moment("2016-05-02");
  var lastDate = moment("2016-05-05").endOf('day');

  // loop through each day in that range, keeping track of a starting point i
  // so we don't have to keep checking already-passed events.
  var i = 0, // pointer to the first entry to check on the next date
    ret = ""; 
  for (var thisDate = firstDate; thisDate <= lastDate; thisDate.add(1, 'days')) {
    ret += '<tr><th>' + thisDate.format("dddd, MMMM D") + "</th></tr>";
    
    // check to see if the next entry is already beyond thisDate:
    if (i === data.length) {
       ret += "<tr><td>No entries today.</td></tr>";   
    } else if (moment(data[i].Date) > thisDate.endOf('day')) {
      ret += "<tr><td>No entries today.</td></tr>";
    } else {
      // starting at...