South Korea is enacting legislation that will see all its citizens technically become one year younger tomorrow, the Daily Mail reports.

Up to now, the South Korean government has used a system where a person’s age was determined from the moment of conception. This meant that by the time a person was born, the individual was already one-year-old.

The rest of the world uses a system that determines age starting at the moment of birth.

Effective tomorrow South Korea will be implementing the same system used by the rest of the world, meaning hundreds of people will be able to celebrate their 50th or 70th birthday one more time.

READ: South Koreans will all become one or two years YOUNGER tomorrow after new rule change