A Google Web Search Help forum thread reports a possible bug with Google’s handling of European dates in their search by date feature.
In the screen shot below, you see I am entering a date range of 31.12.2002 or December 31, 2002 through 31.12.2003 or December 31, 2003. But what Google returns are all results before yesterday, January 2, 2013.
Google has had issues with search by date before, specifically on Google News and Google Video.
Albert from Google responded to the issue saying:
Forum discussion at Google Web Search Help.
