That makes me a Millennial and my wife from 1979 a Gen Xer. Oh, she's not going to like that one bit :P
And what ever happened to Gen X? They just seem to get universally lumped into the Baby Boomers now, if they get mentioned at all.
I think what's really going on is that most of the advertisers ignored Gen X as a waste of marketing resources when Baby Boomers were always the pot of gold. Most of them are now looking back and realizing that they missed an opportunity at that crucial age range, and they're trying to make up for it by continuing to ignore Gen X and going straight for the Millennials. Of course, that's not to say that Gen X was completely ignored or that marketing doesn't work on them. There are clearly any number of instances in which they were targeted with some effect. However, I think that, in general, we live in a world which is still largely skewed in favor of the Baby Boomers, despite the fact that most of them are shifting into fixed incomes and/or continuing to work full-time well into retirement age simply because they do not feel they can retire (sometimes because they're still supporting their Gen X or Millennial children).
http://www.esds1.pt/site/images/stories/isacosta/secondary_p...
http://www.boston.com/bostonglobe/ideas/brainiac/2008/04/fin...
The old Wikipedia article on XY Cusp before it got edited: https://en.wikipedia.org/wiki/User:JCDenton2052/mh5
Excerpt: "The XY Cusp includes those people born in the mid-to-late 1970s and early 1980s. The word XY is used because their generational identity is mixed, uncertain, or deviant from X or Y or both, but do not constitute a separate generational group in themselves. Some place the years between: 1976-1983 [3] [4][5] [6] People born within this group are in parallel situations with people born in between previous generations: Generation Jones between Boomer and X - late 50s, early 60s, (teens of the 70s); between Silents and Boomers - late 30s, early 40s (teens of the 50s); and the Beat generation between G.I. and Silents - late 10s, early 20s (teens of the 30s). They are referred to as Cusper Groups, Transitional Times, or Buffer Zones. John Losey states "If you couldn't neatly place yourself in any of the [generations], then you're probably a Cusper. 1943-1947, 1962-1967 and 1976-1983 are each considered transition times. Many people born during these cusp periods identify with the generations on either side."
There's definitely no single standard in sociology on this.
Gen X is middle age now, and they eventually got low paying jobs working for the baby boomers.
Gen Y happened, but we were boring, so we got retroactively split up and rolled into Gen X and Millenials.
(Also shows how much attention I was paying. I thought there were Boomers, X's, Y's, and Millenials)