Unto perpetuity ;)
I thought my (Millennials) generation was born in 1992 or afterwards. So I was about to challenge your 'mid thirties' assertion. Wikipedia also has a wide range of start and stop birth years, ranging from 1976 to 1996 as the start birth year. https://en.wikipedia.org/wiki/Millennials#Date_and_age_range...
Then I saw this. http://www.pewresearch.org/fact-tank/2016/04/25/millennials-...
It claims that Millenials were born in between 1981 and 1997.
Who is right?
I'm someone in that gap and identify much more closely with millennials than with the Gen X slackers, though a lot of my childhood friends also in that gap identify more with Gen X.
Perhaps it's a combination of my job, that i feel i grew up with (along with?) the internet because my parents were pretty fast in getting connected, and that i have older siblings who are very much Gen X as in leaving college during very difficult job times in the early 90s, and I never shared their experiences.
Easy to remember that way, as well ;-)
We both have younger siblings who were born in '84 (graduated in high school 2002). They're the oldest of what I'd call "true millenials" - I think one of the big distinguishing things is that those who graduated after 2000 had Facebook in college, whereas I didn't. Sure, there was ICQ, IRC, various web forums, Myspace and Friendster and all that stuff, but it wasn't quite the same; those didn't have nearly the reach of Facebook, and most of the people I interacted with pre-facebook I didn't know IRL. I used Facebook to keep in touch with College friends after we all graduated and did the whole post-college-diaspora thing, but my brother and his friends used Facebook constantly as a key part of their social life.
Additionally, cell phones were much more prevalent for the "true millenials" - my brother and I both got cell phones in '03, and for him it was a core part of his college experience.