At what age are you considered an adult in South Korea?
You must be 19 years old to be legally considered as an adult. Let's say you were born on June 15, 2000. 19 years from that day is June 15, 2019. However, as long as it's the same year (the 19th year), you are legally an adult starting on January 1st. So starting on the first day of 2019 you become an adult in South Korea even though you are not technically 19 years old yet.