title: Date on iOS device returns NaN
body: <p>i'm currently developing a cordova web based application with ionic and angularjs. now i've created a service that returns a formatted time the way my client wants it.. the problem with this is that whilst it works on android and in browser, it displays NaN on an iOS device. The date i insert is from a database in timestamp : NOW() format, is there a fix for this? 
  this is my date service: </p>
  
  <pre><code>.factory('displaydate',['$filter', function($filter) {
    return function (date){
      var maandarray = new Array('Januari', 'Februari', 'Maart', 'April', 'Mei', 'Juni', 'Juli', 'Augustus', 'September', 'Oktober', 'November', 'December'); 
      var actiondate = new Date(date);
      var today = new Date();
      if(today.getDate() == actiondate.getDate()){
          var hourssince =   today.getHours() - actiondate.getHours()
          var minutessince =   today.getMinutes() - actiondate.getMinutes()
          var secondssince =   today.getSeconds() - actiondate.getSeconds()
          if(hourssince &gt; 0){
              date = hourssince+'u';
          }else if(minutessince &gt; 0){
              date = minutessince+'m';
          }else{
              date = secondssince+'s';
          }
      }else{
          var oneDay = 24*60*60*1000; // hours*minutes*seconds*milliseconds
          var diffDays = Math.round(Math.abs((today.getTime() - actiondate.getTime())/(oneDay)));
          if(diffDays &gt; 28){
              var identifier = actiondate.getMonth() - 1;
              var month = maandarray[identifier];
              date = $filter('date')(actiondate,"d ") + month +  $filter('date')(actiondate," yy " + " HH:" + "mm");
          }else{ 
              date = diffDays+'d';
          }
      }
      return date;
    }
  }]);
  </code></pre>