Why is the day of the beginning and end of WW2 such a stand-out piece of trivia that you would expect every person who puts "some effort into their education" to know it? You say it as though you find it hard to believe that any responsible adult could lack this particular fact. For myself, I fancy that I know a lot of trivia, including a lot of war-history trivia, but I don't know the day of the year on which that war ended (in fact, the only war start/end date I can recall at the moment is the date of the WWI armistice, because my government reminds me every year).
More generally, I did not see a single question in the list in TFA that I would condemn a person for not knowing that particular question, although I definitely "would like to live in a world where people actually put some effort into their education", and in fact I see some practical value in knowing a lot of trivia.
EDIT: Wait, I just read your top-level comment. You believe that ALL of these questions are "common knowledge that an average human being should know"?? Did you read the list? The AVERAGE HUMAN BEING should know the third-smallest State in the United States of America?!? The average human being should know which country consumed the most tea before WWI? You think it's common knowledge (or was in 1921) who wrote "Home, Sweet Home", and the voltage of street cars, and Lincoln's birthplace, and the wood used in axe handles and kerosene barrels? Seriously? That is batshit insane.