1) We were in the same place during 9/11 (Preschool/Pre-K), and technically are the last who would've been "in school/in a classroom" when the attacks occurred.
2) We entered elementary school (Kindergarten) during the Web 1.0 era (In Fall 2002 and 2003, respectively), when dial-up was still widely in use. Keep in mind, broadband didn't officially overtake dial-up until mid-2004.
3) We each spent the majority of our childhoods (I consider childhood ages 3-11) under the 6th gaming generation rather than the 7th gaming generation.
4) We left elementary and entered middle school prior to the tech boom in 2010, with the launch of the iPad and social media becoming popular.
5) We graduated high school (C/O 2015 and 2016, respectively) under Obama as President and were in college for Trump's election. This also means we were the youngest who voted in that election, alongside '95 and '96 babies who were also in college at the time.
6) Since we had already left high school by the time of the Parkland shooting and the beginning of the walkout protests, we did not participate in them at all.
I personally believe Gen Z begins in 1999 or 2000, but that's a topic for another day.