A lot of people and marketers, real estate businesses, sociologists and so on make up their own categories but the government tells us what it is and that is what the national data (like the GAO)is based on.
‘They’ may have told you something or as you implied are still telling you that but it is wrong.
No, this goes back years and years. I’m 58 and those were the dates I’d always read, heard and discussed by economists and various government officials over the years since the term “baby boomers” was created. I’m not imagining it and I’m not remembering it wrong. Your dates are newer and probably reflect a government effort to make the social security burden that boomers will bring appear to be greater than what it originally was, based on the 1945-1960 dates, so they can more easily justify raising taxes. The reality probably is that those costs are higher due to all the lowlife parasites and immigrants on SSI and SSA that they hadn’t considered some years back.
Anyway, there are much more important things going on at the moment.
Nice talking to you.