I was born in 1989 and the math is HARD some days.
Can confirm, am born in 2000.
I understand that people are scared of “new” math, but for a 1989 birthday just take the last too digits of the current year, add ten, then add one if you’ve already had a birthday this year, e.g. 23+10+1=34. Almost the same math I used to count change when I worked retail.
Today year - 2000 + 11 is that hard?
Why do people even calculate this? It’s an integer you only have to increment once a year. Just remember your age.
They do have to calculate it, it’s just the calculation is a bit easier for them.