<!DOCTYPE html>
<html>

  <head>
    <!-- Latest compiled and minified CSS -->
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">

    <!-- Optional theme -->
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap-theme.min.css">

    <script data-require="angular.js@1.3.20" data-semver="1.3.20" src="https://code.angularjs.org/1.3.20/angular.js"></script>
    <script src="https://angular-ui.github.io/bootstrap/ui-bootstrap-tpls-0.14.2.min.js"></script>
    <link rel="stylesheet" href="style.css" />
    <script src="script.js"></script>
  </head>

  <body>
    <div ng-app="Application" ng-controller="Control as ctrl">
      <div class="container-fluid">
        <div class="row">
          <div class="col-xs-12">
            <div class="form-group">
              <label>Does't work</label>
              <div class="input-group">
                <input type="text" class="form-control" ng-model="ctrl.date" uib-datepicker-popup="MM/dd/yyyy" is-open="ctrl.opened" ng-required="true" />
                <span class="input-group-btn">
                  <button type="button" class="btn btn-default" ng-click="ctrl.opened = true">Open</button>
                </span>
              </div>
            </div>
          </div>
        </div>
        
        <div class="row">
          <div class="col-xs-12">
            <div class="form-group">
              <label>Works</label>
              <div class="input-group">
                <input type="text" class="form-control" ng-model="ctrl.date2" uib-datepicker-popup is-open="ctrl.opened2" ng-required="true" />
                <span class="input-group-btn">
                  <button type="button" class="btn btn-default" ng-click="ctrl.opened2 = true">Open</button>
                </span>
              </div>
            </div>
          </div>
        </div>
        
        <div class="row">
          <div class="col-xs-12">
            <div class="form-group">
              <label>Works</label>
              <div class="input-group">
                <input type="text" class="form-control" ng-model="ctrl.date3" uib-datepicker-popup="MM/dd/yyyy" is-open="ctrl.opened3" />
                <span class="input-group-btn">
                  <button type="button" class="btn btn-default" ng-click="ctrl.opened3 = true">Open</button>
                </span>
              </div>
            </div>
          </div>
        </div>
      </div>
    </div>
  </body>

</html>

// Code goes here

angular.module('Application', ['ui.bootstrap'])
    .controller('Control', function () {
    var ctrl = this;

    ctrl.date = Date.now();
    ctrl.date2 = Date.now();
    ctrl.date3 = Date.now();
});
/* Styles go here */