ANON!!! This has nothing to do with Big Bang so I was hoping I could answer this privately, but I guess I can’t because you’re an anon :( LOL but it’s okay!
Anyway, I’m a Korean who is still pretty much confused about how they calculate age over in that country haha. Heck, even my parents are still confused after living in America for so long. Anyway, yes. Since we’re both 93ers, we’re both internationally 20 years old, but 21 in Korea since they consider the 9 months in the womb as basically one year. So for Kai, who was born in 1994, he’s considered 21 because he’s a January birthday. I believe if you’re born in the first two months of the year (and maybe even up to March), you’re considered older than everyone born in the months after. Very confusing. So if someone was born in January or February of 1995, they would still be somewhat considered a 94er.
All I know is that you add one year for your age in Korea :)
Feel free to elaborate if you’re more educated on this subject than I am!