To solve this question we have to make deduct these 2 years. 2091 minus 1971 will give the answer.
You are 120 years old.
(1440 months are passed.)
From 1971 to 2091 there are 120 years. If you want to learn your age in 2091 (born in 1971) your age is 120.
Let's see what will be your age if you born +1 or -1 from that date.