This is a public service announcement about a feature of Google search that few people seem to know about: date ranges. This is useful in a couple of ways. First, I sometimes want only pages that are really recent, and it's handy to be able to restrict results to the past hour or the past day. Alternatively, sometimes I'm looking for something old, which is hard to find because Google heavily prioritizes recent results. A specific date range fixes that.
In any case, it's easy to specify a date range. After your results come up, click Search tools at the top of the page. Then click Any time and choose an option from the dropdown list. That's it.