Google (and related services, such as youtube) allows you to use before:YYYY-MM-DD and after:YYYY-MM-DD to only show results that were created before or after a certain date.
I think you're missing the wood for the trees a bit there. The point is that there's so much on Google now - and a lot of it is effectively just crap data like pinterest posts - that it becomes increasingly impossible to find specific needles in that haystack. If I know at some point in the last 10 years I've read an article online that could have been written any point in the last 30 years, before and after dates don't really help.
You're suggesting spending a lot of time and hassle trying to wrestle with search engines instead of just keeping a bookmark that can be found and accessed very quickly?