South Koreans have become younger due to a new law aligning age-counting methods with international standards.
The law abolished the traditional "Korean age" system, where a person turns one at birth and gains a year on January 1st.
Another traditional system counted everyone as aging by a year every January 1st, regardless of their actual birthdays.
The switch to age-counting based on birth date took effect on a specific date.
President Yoon Suk Yeol advocated strongly for the change, citing unnecessary social and economic costs caused by the old methods.
South Korea's most widely used calculation method was the "Korean age" system.
The new system follows the international standard, making South Koreans one or two years younger than the previous counting methods.
Three out of four South Koreans supported the standardization of age-counting methods, according to a poll in January 2022.