The shortest day of the year in the southern hemisphere is the same day the the northern hemisphere has it's longest day, the Summer Solstice. Which occurs on either June 21 or 22.
The date you are searching for is 2015-12-21.
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.