I have no idea if this is old or not, but I have never seen it myself until today. When you search for [sunrise] or [sunset] on Google, Google will give you a onebox result with the sunrise or sunset time for your current location.
It will also work to tell me when [sunrise los angeles] is this morning:
This is nothing advanced and Ask.com and Wolfram Alpha do it, I don't think Bing or Yahoo does - but I had no idea Google did this until today.
Forum discussion at Google Web Search Help.