[Fred27]

Korea has a system similar to this. You start at age 1 and get one year older each New Year's Day. https://www.90daykorean.com/korean-age-all-about-age-in-kore...

[whycome]

They changed the system last year after using it for many years (+/-1).

https://www.aljazeera.com/amp/news/2023/6/28/why-are-south-k...