title: FullCalendar-v4 allDay events not rendering
body: <p>I have managed to get my recurring events to show up on the calendar, but my single allDay events will not render and I believe its a field problem.</p>
  
  <p>I've tried making the event's start time an iso date which doesn't seem to matter as my recurring events are being saved as a string.</p>
  
  <p>This is a recurring event and shows up on the calendar</p>
  
  <pre><code>{
      "_id" : ObjectId("5d4af079f91ff532f8fc0385"),
      "daysOfWeek" : [ 
          1, 
          2, 
          3
      ],
      "locationId" : ObjectId("5d28cad23f49646797e05adc"),
      "allDay" : true,
      "start" : "2019-08-07",
      "end" : "2019-08-07",
      "startRecur" : "2019-08-07",
      "endRecur" : "2019-08-31",
      "title" : "Change Bulbs",
      "backgroundColor" : "rgb(87, 87, 244)",
      "source" : null,
      "interval" : "Weekly",
      "category" : "Facility",
      "monday" : true,
      "tuesday" : true,
      "wednesday" : true,
      "completed" : false,
      "frequency" : null,
      "__v" : 0
  }
  </code></pre>
  
  <p>this is a single event that showed up in FC-v3 but wont in v4</p>
  
  <pre><code>{
      "_id" : ObjectId("5d4b455e121f726f510f2b5c"),
      "daysOfWeek" : [],
      "batchId" : ObjectId("5d28f52d823083adfc6e8c4d"),
      "locationId" : ObjectId("5d28cad23f49646797e05adc"),
      "end" : null,
      "startRecur" : "",
      "endRecur" : "",
      "allDay" : true,
      "start" : "2019-08-08",
      "title" : "First Transplant",
      "backgroundColor" : "rgb(87, 87, 244)",
      "interval" : "Single Event",
      "category" : "Cultivation",
      "monday" : false,
      "tuesday" : false,
      "wednesday" : false,
      "thursday" : false,
      "friday" : false,
      "saturday" : false,
      "sunday" : false,
      "completed" : false,
      "__v" : 0
  }
  </code></pre>
  
  <p>so i made an event with the proper ISO Date and it failed as well</p>
  
  <pre><code>{
      "_id" : ObjectId("5d4b4f9a56114f747c7ddcef"),
      "daysOfWeek" : [],
      "batchId" : ObjectId("5d28f52d823083adfc6e8c4d"),
      "locationId" : ObjectId("5d28cad23f49646797e05adc"),
      "allDay" : true,
      "start" : ISODate("2019-08-08T00:00:00.000Z"),
      "end" : null,
      "title" : "IMP",
      "backgroundColor" : "rgb(87, 87, 244)",
      "interval" : "Single Event",
      "category" : "Cultivation",
      "monday" : false,
      "tuesday" : false,
      "wednesday" : false,
      "thursday" : false,
      "friday" : false,
      "saturday" : false,
      "sunday" : false,
      "completed" : false,
      "__v" : 0
  }
  </code></pre>
  
  <p>comp.ts code</p>
  
  <pre><code>createEvent(form) {
          if (form.valid) {
              this.newEvent.category = 'Cultivation';
              this.newEvent.completed = false;
              this.newEvent.allDay = true;
              this.newEvent.locationId = this.selectedLocation._id;
              this.newEvent.batchId = this.selectedBatch._id;
              this.newEvent.start = moment(this.newEvent.start).utc();
              this.newEvent.start.hours(0).minutes(0).seconds(0);
              // this.newEvent.source =  null;
              // this.newEvent.daysOfWeek = [];
              if (this.newEvent.interval === 'Single Event') {
                  this.newEvent.end = null;
                  // this.newEvent.startRecur = '';
                  // this.newEvent.endRecur = '';
                  this.newEvent.monday = false;
                  this.newEvent.tuesday = false;
                  this.newEvent.wednesday = false;
                  this.newEvent.thursday = false;
                  this.newEvent.friday = false;
                  this.newEvent.saturday = false;
                  this.newEvent.sunday = false;
              }
              // if ( this.newEvent.interval === 'Daily'  || this.newEvent.interval === 'Weekly'){
              // }
              if (this.newEvent.interval === 'Weekly') {
                  this.newEvent.startRecur = this.newEvent.start;
                  this.newEvent.end = this.newEvent.start;
                  this.newEvent.frequency = NaN;
                  if (this.newEvent.sunday) {
                      this.newEvent.daysOfWeek.push(0);
                  }
                  if (this.newEvent.monday) {
                      this.newEvent.daysOfWeek.push(1);
                  }
                  if (this.newEvent.tuesday) {
                      this.newEvent.daysOfWeek.push(2);
                  }
                  if (this.newEvent.wednesday) {
                      this.newEvent.daysOfWeek.push(3);
                  }
                  if (this.newEvent.thursday) {
                      this.newEvent.daysOfWeek.push(4);
                  }
                  if (this.newEvent.friday) {
                      this.newEvent.daysOfWeek.push(5);
                  }
                  if (this.newEvent.saturday) {
                      this.newEvent.daysOfWeek.push(6);
                  }
              }
  ...sub to database
  </code></pre>