To solve this question we have to make deduct these 2 years. 2119 minus 1979 will give the answer.
You are 140 years old.
(1680 months are passed.)
From 1979 to 2119 there are 140 years. If you want to learn your age in 2119 (born in 1979) your age is 140.
Let's see what will be your age if you born +1 or -1 from that date.