If you have Korean heritage, you might have experiences of making people confused with your age because Korean age-calculating system is very different from the Western age system.
The Sydney Morning Herald reported why Korean babies born on December 31 become 2-year-olds on the next day.
That is mainly because every baby born in South Korea become 1 on the day of their birth and then get an additional year when the calendar his January 1.
The article says a lawmaker is working now to abolish the Korean age as it causes confusion and inefficiency.
[The full story is available on the podcast.]