title: momentjs keep getting the following error moment.js:Deprecation warning: value provided is not in a recognized RFC2822 or ISO
body: <p>I am trying to integrate maddhatter laravel-fullcalendar into a laravel app, I have the calendar working on most browsers but it fails on Internet Exprorer, when I do an inspect I get the deprecation warning.</p>
  
  <p>My array looks like this:</p>
  
  <pre class="lang-js prettyprint-override"><code>$('#calendar-wean15RN').fullCalendar({
    "header":{
       "left":"prev,next today",
       "center":"title",
       "right":"month,agendaWeek,agendaDay"
    },
    "eventLimit":true,
    "defaultDate":"Apr 2017",
    "eventColor":"#3c8dbc !important",
    "eventBackgroundColor":"#3c8dbc !important",
    "eventBorderColor":"#3c8dbc",
    "eventTextColor":"#fff !important",
    "events":[{
      "id":"1557",
      "title":"xxx \nHrs worked:6.00",
      "allDay":"true",
      "start":"2017-04-03T09:00:00+00:00",
      "end":"2017-04-03T15:00:00+00:00",
      "url":"\/timesheet\/1557\/edit"
    }]
  }
  </code></pre>
  
  <p>Not sure what I am doing wrong.</p>
  
  <p>The full error looks like this</p>
  
  <pre><code>Deprecation warning: value provided is not in a recognized RFC2822 or ISO format. moment construction falls back to js Date(), which is not reliable across all browsers and versions. Non RFC2822/ISO date formats are discouraged and will be removed in an upcoming major release. Please refer to http://momentjs.com/guides/#/warnings/js-date/ for more info.
  Arguments: 
  [0] _isAMomentObject: true, _isUTC: true, _useUTC: true, _l: undefined, _i: Apr 2017, _f: undefined, _strict: undefined, _locale: [object Object]
  Error
      at Function.createFromInputFallback (js/moment.js:314:94)
      at configFromString (js/moment.js:2172:11)
      at configFromInput (js/moment.js:2541:9)
      at prepareConfig (js/moment.js:2524:9)
      at createFromConfig (js/moment.js:2491:40)
      at createLocalOrUTC (js/moment.js:2578:12)
      at Function.createUTC [as utc] (js/moment.js:81:12)
      at makeMoment (js/fullcalendar.js:1197:21)
      at FC.moment.parseZone (js/fullcalendar.js:1154:9)
      at constructor.moment (js/fullcalendar.js:11795:30)
  warn @ moment.js:287
  </code></pre>