To solve this question we have to make deduct these 2 years. 2090 minus 1971 will give the answer.
You are 119 years old.
(1428 months are passed.)
From 1971 to 2090 there are 119 years. If you want to learn your age in 2090 (born in 1971) your age is 119.
Let's see what will be your age if you born +1 or -1 from that date.