I recommend using this as it will save you a LOT of time for finding exactly what you are wanting and fast.  Many times I am needing to find the latest information so I have honed it down to either the last year or month and can find the info in seconds with this tool.  These improvements to the Google Search Options will continue.  I love ’em!

Today, we’re announcing nine new Search Options tools: past hour, specific date range, more shopping sites, fewer shopping sites, visited pages, not yet visited, books, blogs and news. These features have been rolling out gradually and will be available globally in English by the end of the day. You can try them yourself by searching Google and clicking “Show options” in the blue bar just under the logo.

via Official Google Blog: Refine your search results with new Search Options.