<link href="//netdna.bootstrapcdn.com/bootstrap/3.1.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.1.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<div class="jumbotron">
<div class="container">
<span class="glyphicon glyphicon-list-alt"></span>
<h2>Calendar</h2>
<div class="box">
<input type="text" placeholder="username">
<input type="password" placeholder="password">
<button class="btn btn-default full-width"><span class="glyphicon glyphicon-ok"></span></button>
</div>
</div>
</div>