No need to assume Teenage anything. Sid Meier's Civilization (I) came out in 1991, Civilization II came out in 1996. Even the second, then, is now 28 years old - the kid born in Civilization Time is now old enough to have their own kid - a Civilization Grandchild.
God, I feel old . . .
Try being someone who started playing Civ 3 the summer he graduated high school and then joined these forums. My profile on here is old enough to drink!
Increasingly people are inhabitants of their own time only. My parents were both one of eight children and, in their generation, the average number of kids were still above replacement. But once the generations of my cousins found television, drugs, and computers this cratered. Now from this family nobody even knows of the existence of the latter generations. Did so and so ever have any kids? Many didn't marry and if so divorced and kids, who knows, some no, some yes. Some don't even know if they had kids. And that even before you factor in changing sexual proclivities and genders.
And so, to a people like this how could December 7th have meaning? Eighteen inches from where I type this, hangs a WW2 uniform jacket, worn by my father. Why do I keep it?
December 7, 1941, still lives in my closet. When I die someone not related to me will toss it into the bin, and that is the best-case scenario.
Increasingly people are inhabitants of their own time only.
If that. We are hit with so much news, constantly, that most people can't even recall big events that happened six months ago unless they persist in the news, like a political trial or the Ukrainian/Israeli wars.