You'll never fail to be surprised by the creative ways that Google presents information. While most people are familiar with the normal Google [or other browser] search results, Google offers a number of options that normally remain hidden.
There is one called the "Wonder Wheel" that produces output like this [click on images for larger view]:
And there is the other is the "Timeline" search:
By clicking on a segment of the timeline, you can narrow the search to that narrower time frame.
You can continue to narrow the search to a specific month in this manner.