It has for a long time.  I&#x27;m technically part of the Baby Boom, but when people talk about &quot;The Baby Boomers&quot; they mean the first ten years.  Its always obvious.  Those of us in the second ten years are not similar.  I find people group well by decade, starting in mid-decade: 1945-55, 1955-65, 1965-75, etc.