How do I know that? Because, around 15 years ago, 50 was the New 30; then 60 was the New 40 or the New 50 (you choose). And now, 70 is the New 50. You can probably see a pattern emerging here: as we Baby-boomers (i.e. those of us born between 1945 and 1955) hit a new milestone birthday and arrive at a new decade, that decade becomes The New 30, The New 40 or The New 50.