Passing String to the Constructor of Date Class

/**
 * Copyright 9re ( http://wonderfl.net/user/9re )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/lW6L
 */

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" creationComplete="rssLoader.send()" paddingBottom="0" paddingLeft="0" paddingTop="0" paddingRight="0">
<mx:HTTPService id="rssLoader" result="onRSSLoaded(event)" url="http://level0.kayac.com/index.xml" resultFormat="text" showBusyCursor="true" />
<mx:ArrayCollection id="feed" />
<mx:DataGrid id="reader" width="100%" height="100%" change='navigateToURL(new URLRequest(reader.selectedItem.link), "_blank")'>
    <mx:columns>
        <mx:DataGridColumn dataField="title"/>
        <mx:DataGridColumn dataField="日付" width="150" />
    </mx:columns>
</mx:DataGrid>
<mx:Script><![CDATA[
import flash.net.navigateToURL;
import flash.net.URLRequest;
import mx.controls.Alert;
import mx.rpc.events.ResultEvent;
private function onRSSLoaded(e:ResultEvent):void {
    var data:Array = [];
    for each (var item:XML in XML(rssLoader.lastResult).channel.item) {
        // pass string to Date constructor
        var date:Date = new Date(item.pubDate.toString());
        data.push( {
            title : item.title,
            link  : item.link,
            日付 : date.fullYear + '年' + (date.month + 1) + '月' + date.date + '日 ' + date.hours + '時'
        });
    }
        
    feed.source = data;
    reader.dataProvider = feed;
}
]]></mx:Script>
</mx:Application>