You're trying to solve this as if it were Java, which it's not. Instead, try using things from the Cocoa Touch frameworks. Since your calculations are rather simple, you can do them with dates, but more complex things can pretty easily be done using NSCalendar and NSDateComponents.
Use my function for comparing date its working on my project.
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.