I think Yahoo&#x27;s YQL[1] can do that.<p>A query like:<p><pre><code>    SELECT title, link, pubDate FROM rss 
    WHERE url IN (
    &#x27;http:&#x2F;&#x2F;feed1&#x27;, 
    &#x27;http:&#x2F;&#x2F;feed2&#x27;,
    &#x27;http:&#x2F;&#x2F;feed3&#x27;
    ) | SORT(field=&quot;pubDate&quot;, descending=&quot;true&quot;);
</code></pre>
should do the job.<p>[1] <a href="https:&#x2F;&#x2F;developer.yahoo.com&#x2F;yql&#x2F;console&#x2F;" rel="nofollow">https:&#x2F;&#x2F;developer.yahoo.com&#x2F;yql&#x2F;console&#x2F;</a>