Ways to Say It
Korean politeness levels matter more here than in most languages — the phrase itself changes based on who you're speaking to.
생일 축하해요Happy birthday — polite, safe for most everyday situations
생일 축하해Happy birthday — casual, used with close friends and peers
생신 축하드립니다Happy birthday — honorific, used specifically for elders or superiors
생일 축하합니다Happy birthday — formal, polite version for more distant relationships
행복한 생일 되세요Have a happy birthday — a warm, polite alternative phrasing
Example Messages
Full example messages you can send as-is or adapt.
Frequently Asked Questions
What's the difference between 생일 and 생신?
생일 (saeng-il) is the standard word for birthday, while 생신 (saeng-shin) is the honorific version used specifically when referring to an elder's birthday, out of respect.
Which version should I use with someone I just met?
생일 축하합니다 (formal/polite) is the safest choice for someone you don't know well or in a professional context.
Is it rude to use the casual form with an older relative?
Yes — using casual speech with an elder, including for birthday wishes, can come across as disrespectful in Korean culture; the honorific form (생신 축하드립니다) is expected instead.