How to Say Happy Birthday in Korean
Written and reviewed by Jun and Jin, native Korean speakers
Published · How we write & review
After this page, you can say happy birthday at the right politeness level, and know why Koreans eat 미역국 (miyeokguk) on their birthday.
10-second answer
How do you say happy birthday in Korean?
생일 축하해요 (saengil chukhahaeyo) is the standard way to say "Happy Birthday" in Korean — 생일 (birthday) + 축하하다 (chukhahada, to congratulate/celebrate). Like most expressions on this site, it scales across politeness levels depending on who you're talking to.
Quick check — did that land?
1. How do you wish a close friend Happy Birthday casually?
In Korea, birthdays come with a surprising tradition.
The Politeness Ladder
| Form | Level | Use with |
|---|---|---|
| 생일 축하합니다 | Formal | Very formal settings, official messages |
| 생일 축하해요 | Polite | The everyday default with most people |
| 생일 축하해 | Casual | Close friends, younger people |
축하해 works for far more than birthdays — see six ways to say congratulations.
See also: 감사합니다 vs 고마워
Quick Examples
생일 축하해!
saengil chukhahae!
Happy birthday!
Casual — texting a close friend.
생일 축하드려요.
saengil chukhadeuryeoyo.
Happy birthday.
Extra respectful — the humble 드리다 form, fitting for an elder.
생일 축하해요, 오빠!
saengil chukhahaeyo, oppa!
Happy birthday, oppa!
Combines two pages you already know.
미역국: The Birthday Soup Tradition
미역국 (miyeokguk, seaweed soup) is traditionally eaten on birthdays in Korea — connected to the custom of mothers eating it after childbirth for its nutritional benefits, so it became symbolically tied to one's own birth. It's common enough that "did you eat your miyeokguk?" functions almost like asking if someone properly celebrated their birthday.
There's also a widely known superstition: avoid eating 미역국 on the day of an exam or interview, because 미역 is slippery — the association is "slipping up" or failing, the opposite of what you want that day.
Common Mistakes
Mistake #1 — Defaulting to the formal form with friends
생일 축하합니다 to a close friend can sound oddly stiff — 생일 축하해 fits the relationship better.
Mistake #2 — Missing the 미역국 cultural context
If a Korean friend mentions eating (or NOT eating) 미역국 around their birthday or an important test, now you know exactly why it matters.
Mini Quiz
2. What is 미역국 traditionally eaten for?
3. Why do people avoid 미역국 before an exam?
Related Knowledge
Learn Next
How to Say Good Night in Korean
Birthdays covered — the other daily-life phrase every learner needs is how to end the day.
Will you remember this tomorrow?
Save it — your daily review brings it back right before you'd forget. No account needed.