The traditional age calculation method used in South Korea will no longer be used. It was unanimously accepted to change the traditional age calculation method with the vote in the parliament.

With the system, which will come into effect in June 2023, South Korean citizens will switch to the age calculation system used in the world system.

According to the traditional age calculation method in South Korea, people are considered one year old when they are born. In the country where everyone was born 1 year old, those born on 31 December will be 2 years old on 1 January according to the traditional age calculation system.

The change was criticized for the social and administrative costs of the traditional method when juxtaposed with the international system. South Korean President Yoon Seok-yeol promised in his election campaign that he would change this system.