I’ve never heard of generation Y and Millenial before. Are these pretty common terms?
I believe that they are fairly common, at least here in America. Where are you located?
I think I first heard them at an assembly in middle school around 1999. It talked about how the people born in the post-war period from 1945 - 1963 were the Baby Boomer Generation because of the high birth rates due to servicemen returning home from WWII/Korean War, etc.
Generation X was described as people born from 1963 - 1980 and who were growing up with things like the increasing threat of the Cold War, the hippie counter-culture, etc.
And then Generation Y / the Millenial Generation is people born between 1980 and 2000. We’re also called Echo Boomers because we’re the children of the Baby Boomers.
Sociologists apparently study how all of the things going on in the nation / world affect a generation’s outlook / beliefs, etc, I think? IDK, someone more knowledgeable than I am would be able to tell you more.