We bet you probably tried this out and found it worked (if not try it now) – amazing, right?
Well, maybe not, as it seems we are not just ‘2018 today’ – but we are actually all whatever year it is – if it is 31st December.
Give it a try with 2017 or 2019 and you will see that works just the same.
In short, your age plus the year you were born equals the current year – so long as you have had your birthday in the current year… Which is why, to be sure, it has to be December 31st.
It just goes to show, you shouldn’t immediately take everything you read at face value!