Actually, i'm terrible in dates, since i can't even remember my parents or relatives birthdays, so this so not for me.
But, it seems a good way to learn a few things.
Everything is well done, no complaint about that.
The only negative point, in my opinion, is that you don't give the answer when it's wrong. I know, you can find it yourself, internet is here for that...But i think a tiny window opening when you're wrong, giving a few trivia facts about the event, or other close events as hints would definitely be an improvement.
You know, just to prevent the kid to google the event and to dumbly copy the date without thinking a little bit.
And overall, yeah, it's boring. But learning dates IS boring, unless you're passionate about history or specific events...So, i guess this can't be helped. But i bow at the effort.