I don't know what it was like before Dec 7th, 1941... or Aug 18, 1920...
Or what it's like to not have planes, or cars, or immunizations, or printing presses. I can imagine, but as I was born into a world that had already had WW2 & Women's Suffrage, and planes, cars, immunizations, printing presses... these are just normal things for me.
When I was in the 6th grade, the Berlin Wall came down. In K, the Challenger exploded. Yet these things weren't taught in schools for another 10-15 years (for one thing it takes awhile for history books to be published, as well as for an event to BECOME history).
Current Events usually isn't taught until Highschool. For the very good reason that current events are usually pretty terrible (whether it's 1916 or 2016... if it's happening RIGHT NOW... it's scary and awful and we don't know what will happen), very complex (go ahead, describe the Israeli / Palestinian Conflict, or any of several ongoing wars). We don't know what's going to happen, there is no "And this is what happened". We can describe the Genocide of the Albanians by the Serbs (the only place in the world you really WANT to shout "I'm an American!" in a riot is Kosovo... they have days of mourning for our internal crises)... or the Cold War... or Prohibition because they've OVER. We have a beginning, middle, and end to share with children. When we only have a beginning and are IN the middle with the end up in the air... we save that for highschool and college.