Yes, because you didn't put any input validation. Even though your yearRange is 1900:2050, that doesn't mean the user cannot input other years by typing in the keyboard. I suggest making the datefield readonly so that it can only be access by the datepicker ui, or you can create a function which will check the date which is input by the user.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.