DatePicker format issue

<!doctype html>
<html ng-app="plunker">
  <head>
    <script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.2.8/angular.js"></script>
    <script src="http://angular-ui.github.io/bootstrap/ui-bootstrap-tpls-0.10.0.js"></script>
    <script src="//cdnjs.cloudflare.com/ajax/libs/moment.js/2.6.0/moment.min.js"></script>
    <script src="example.js"></script>
    <link href="//netdna.bootstrapcdn.com/bootstrap/3.0.3/css/bootstrap.min.css" rel="stylesheet">
  </head>
  <body>

<div ng-controller="DatepickerDemoCtrl">
    <pre>Selected date is: <em>{{dt | date:'fullDate' }}</em></pre>

    <h4>Popup</h4>
    <div class="row">
        <div class="col-md-6">
            <p class="input-group">
              <input type="text" date-parser class="form-control" datepicker-popup="{{format}}" ng-model="dt" is-open="opened" datepicker-options="dateOptions" ng-required="true" close-text="Close" />
              <span class="input-group-btn">
                <button class="btn btn-default" ng-click="open($event)"><i class="glyphicon glyphicon-calendar"></i></button>
              </span>
            </p>
        </div>
    </div>
    <div class="row">
        <div class="col-md-6">
            <label>Format:</label> <select class="form-control" ng-model="format" ng-options="f for f in formats"><option></option></select>
        </div>
    </div>

    <hr />
    <button class="btn btn-sm btn-info" ng-click="today()">Today</button>
    <button class="btn btn-sm btn-default" ng-click="dt = '2009-08-24'">2009-08-24</button>
</div>
  </body>
</html>

var app = angular.module('plunker', ['ui.bootstrap']);
var DatepickerDemoCtrl = function ($scope) {
  $scope.today = function() {
    $scope.dt = "1971-03-03T00:00:00";
    //$scope.dt = new Date();
  };
  $scope.today();

  $scope.open = function($event) {
    $event.preventDefault();
    $event.stopPropagation();

    $scope.opened = true;
  };

  $scope.dateOptions = {
    'year-format': "'yy'",
    'starting-day': 1
  };

  $scope.formats = ['dd/MM/yyyy'];
  $scope.format = $scope.formats[0];
};


app.directive('dateParser', function () {
    return {
        restrict: 'A',
        require: 'ngModel',
        link: function (scope, element, attrs, ctrl) {
            var dateFormat = scope.format.toUpperCase();

            ctrl.$formatters.push(function (modelValue) {
                return "01/01/1900";
            });

            ctrl.$parsers.unshift(function (viewValue) {
                //convert string input into moment data model
                var isValueADate = (viewValue === null) ? false : angular.isDate(viewValue);
                var parsedMoment = (isValueADate) ? moment(viewValue) : moment(viewValue, dateFormat);

                //toggle validity
                ctrl.$setValidity(attrs.ngModel, parsedMoment.isValid());

                //return model value
                return parsedMoment.isValid() ? parsedMoment.toDate() : undefined;
            });
        }
    };
});