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HTML

<!doctype html>
 
<html lang="en">
<head>
    <meta charset="utf-8" />
    <title>jQuery UI Datepicker - Display multiple months</title>
    <link rel="stylesheet" href="http://code.jquery.com/ui/1.9.2/themes/base/jquery-ui.css" />
    <script src="http://code.jquery.com/jquery-1.8.3.js"></script>
    <!-- <script src="http://code.jquery.com/ui/1.9.2/jquery-ui.js"></script>-->
    
    <script>
    $(function() {
        $( "#datepicker" ).datepicker({
            numberOfMonths: 1,
            showButtonPanel: true
        });
    });
    </script>
    
    <script>
   /*! jQuery UI - v1.9.2 - 2012-11-23
* http://jqueryui.com
* Includes: jquery.ui.core.js, jquery.ui.widget.js, jquery.ui.mouse.js, jquery.ui.draggable.js, jquery.ui.droppable.js, jquery.ui.resizable.js, jquery.ui.selectable.js, jquery.ui.sortable.js, jquery.ui.effect.js, jquery.ui.accordion.js, jquery.ui.autocomplete.js, jquery.ui.button.js, jquery.ui.datepicker.js, jquery.ui.dialog.js, jquery.ui.effect-blind.js, jquery.ui.effect-bounce.js, jquery.ui.effect-clip.js, jquery.ui.effect-drop.js, jquery.ui.effect-explode.js, jquery.ui.effect-fade.js, jquery.ui.effect-fold.js, jquery.ui.effect-highlight.js, jquery.ui.effect-pulsate.js, jquery.ui.effect-scale.js, jquery.ui.effect-shake.js, jquery.ui.effect-slide.js, jquery.ui.effect-transfer.js, jquery.ui.menu.js, jquery.ui.position.js, jquery.ui.progressbar.js, jquery.ui.slider.js, jquery.ui.spinner.js, jquery.ui.tabs.js, jquery.ui.tooltip.js
* Copyright 2012 jQuery Foundation and other contributors; Licensed MIT */

(function( $, undefined ) {

var uuid = 0,
    runiqueId = /^ui-id-\d+$/;

// prevent duplicate loading
// this is only a problem because we proxy existing functions
// and we don't want to double proxy them
$.ui = $.ui || {};
if ( $.ui.version ) {
    return;
}

$.extend( $.ui, {
    version: "1.9.2",

    keyCode: {
        BACKSPACE: 8,
        COMMA: 188,
        DELETE: 46,
        DOWN: 40,
        END: 35,
        ENTER: 13,
       ...

CSS

.ui-datepicker-close {
margin-bottom: 5px !important;
}