Set a conditional year end date outcomes

Hello,
I am trying to set a conditional year end date outcomes.
1. If cell "A1" shows 10/31/2016, then I want cell "B1" to show year end 12/31/2016. This gives us two remaining months in 2016 before year end.
However,
2. If cell "A1" shows 01/01/2017, then cell "B1" ideally would show year end 12/31/2017.
Giving twelve remaining months in 2017 before year end.

Thanks so very much!!!!