How to: Google Search by Date…
Google is testing a new feature – Search by date. Here is how to do it.
Go to http://www.google.com
Search for whatever you want to.
In the Address bar (IE)/Location bar (FF), append this to the end of the URL: "&as_qdr=y". (without quotes).
Click on search.
Now, you get a drop-down with options to filter search by
– past year
– past 3 months
– past 6 months