Millennials have a bad reputation among older generations. I believe that image is beginning to change, but since the millennial generation's coming of age, media has portrayed us as entitled and impatient. I use the word "us" because I am part of this dynamic generation known as the millennial generation.
In recent years, many writers and marketers have considered members of our generation those born between 1980 and 2000. This is a very large over-generalization that does not capture the true psyche and behavior of a millennial.
For the purposes of my book, and arguably the more accurate definition, millennials are those born between 1983 and 1998. That is the larger generational time frame, but there are some distinguished sub-groups within our generation that makes marketing to the whole a little trickier.
The tip of the spear is the sub-group of millennials born between 1983 and 1988, "Gen Y" millennials. Aside from the “Gen Y” early millennials, there are mid millennials (born 1988-1993), and late millennials (born 1993-1998), also referred to as iPhone millennials.
More specifically, people born in 1982 are considered millennials if they graduated high school in 2001 (or later). Also, those born in 1998 are on the fringe of being true millennials, because they are still determining what their generational mindset will be. Some could easily behave as millennials, and some will behave more like the next generation. To some degree, this is true for all millennials, but my book speaks to the vast majority of millennials as a group.