Korean Age: Why You're 1 or 2 Years Older in Korea
In Korea, your age is different! Discover the Korean age system, how to calculate it, and the recent 2023 changes.
Published on March 2, 2026
How Old Are You in Korea?
If you were born in 1998, you're 27 in most countries in 2026. But in Korea, until recently, you would have been 28 or 29 depending on the time of year.
Why? Because Korea had a unique age system found nowhere else in the world.
The 3 Korean Age Systems
Korea historically used 3 systems simultaneously:
1. Traditional Korean Age
| Rule | Detail |
|---|---|
| At birth | You're already 1 year old |
| Every January 1st | Everyone gains 1 year |
| Your birthday | Doesn't change your age |
Example: If born December 15, 2000, on December 20 you were 1 year old. On January 1, 2001, you were 2 years old despite being only 17 days old.
2. International Age (만 나이, man nai)
The system used in most countries. 0 at birth, +1 on each birthday.
3. "Year" Age (연 나이, yeon nai)
Current year - Birth year. Used for certain laws (alcohol purchase, military service).
The June 2023 Reform
On June 28, 2023, South Korea officially adopted international age for all legal and administrative documents.
But in daily life, many Koreans still use traditional Korean age. It's so deeply embedded in culture that the change will take time.
How to Calculate Your Korean Age
Simple formula:
- Before your birthday: international age + 2
- After your birthday: international age + 1
Why Koreans Always Ask Your Age
In Korea, age determines how you speak to someone. The first question between two people who just met is often:
몇 살이에요? (myeot sarieyo?) — How old are you?
Or between young people:
몇 년생이에요? (myeot nyeonsaengieyo?) — What year were you born?
This is necessary to know which politeness level to use and which title to employ (Oppa, Eonni, Hyeong, Nuna).
The Concept of 동갑 (donggap)
동갑 means "same age." When two Koreans discover they're 동갑, it's often a moment of joy — it means they can speak as equals, using casual speech.
FAQ
Q: Do Koreans celebrate their birthday? A: Yes! Even though Korean age doesn't change on your birthday, Koreans celebrate with cakes, gifts, and 미역국 (miyeokguk, seaweed soup — the traditional birthday dish).
Q: Has the system really changed in 2023? A: Legally, yes. Culturally, the change is gradual. Most Koreans still use Korean age in informal conversations.
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