When you’re just using Google web search (e.g., Google.com), along the top of the search results page is a button labeled “Tools”; click it and you’ll get a pull-down menu labeled “Any time” that lets you limit your search to results updated within the past hour, past 24 hours, past week, and so on. It’s a nifty option and I frequently use it to limit my searches to the past two years.
Google News doesn’t offer a similar option, so you can’t easily limit a search in Google News by date. If you type a query in the search box at the top of Google News, you may retrieve articles from weeks or months ago. As Greg pointed out, the way around this is to start your search in Google.com. In the search results page, click the link for News, then click Tools. Bingo – there’s a pull-down menu labeled “Recent” that lets you limit your search by date. I have been surprised by how many times this little trick has come in handy over the last couple of weeks. Thanks, Greg!