Board Thread:False Info and Speculative Discussion/@comment-5379216-20140705054016/@comment-31221147-20170203195944

Well if We look at what his final Choice Age is for the show with his six years older than Scott and Stiles at 16 and Derek Six years older that means he is 22 years old. And Derek was sixteen at the Time of the Fire.

Now 2011-22=1989 So if we take into account that we two conflicting dates for his birth and they list his birth for the Months of November or December. That means Derek was actually 21 in January of 2011.

So Take the year in which events are taking place and minus the age at which a Character is supposed to be. But if he was actually 22 years old and taking into account the time of year he was supposed to be born, Then his Year of Birth was 1988. It's that simple.

But if my Cousin had stuck with having Derek at 19 like he first planned Then Derek would have been born at the Tail end of 1991 for him to be 19 in the Month of January of 2011. When the Series is supposed to Start. And considering I Graduated High School in June of 1991 and I was 18. And I was born April 29,1973. So as you can see I would be old enough to be his mother even  though I would be a teenager at the Time.