Good!

Well made quiz with an interesting gameplay mehcanic, but with one glaring problem - it does not tell you the right answer. Sure you can read up on the trivia about the dates you do know about, but you do not learn anything about the dates, not from this game anyway (or you can just squint really hard and read a blurred out trivia about the dates you did not know about). Would have been 5 stars game otherwise

Well

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.

Ugh

Great programming, great interface, but HORRIBLY BORING. Nobody wants to play an educational Flash game.

Well, since you are asking...

Wonderful interface, great programming, but incredibly boring gameplay and while the music could have been more "exiting" it just seems to make everything even more boring. This is one of those things you really want to rate higher, but you just feel that you would be betraying yourself.
My suggestion is that you could make things more exiting by using brighter colors, more lively music and crazier sound effects. You know... more like a game, than a history lesson.

But great work, just not my thing and thus impossible for me to look upon at a general point of view.