Chiming in to agree that "historical" means "before the reader was born." We're now at the point where even many of our YA readers were born after 2000. When I was growing up, historical was definitely anything prior to my birth.
Yes, if you are writing about a decade that living people still remember well, do find a reader or two from among them as beta readers, specifically asking them to check for anachronisms. I recently read a published novel set in the decade of my childhood, and was pulled out of the story by references to things that hadn't existed then yet.
Actually -- even though those things mentioned above could and should have been checked -- this just gives me even more respect for history and those who venture to write about it. If we can make fairly significant mistakes even about decades that living people remember, what kinds of mistakes are we making about 100 years ago and beyond? All we can do, with fiction or nonfiction, is write the best we can to try to pass those stories on, but our expertise is less than we think, so very easily veiled by time.