Wed, Oct 28, 2026 · Slangdunk Editors

What does 캘박 (kaelbak) mean? The Korean slang for pinning plans to your calendar

캘박 is short for 캘린더 박제, “pinning it to the calendar”: saving a plan in your calendar app so you won't forget. Among young Koreans it works like a stamp that makes plans official — yet in a 2026 survey only 15.0% of adults knew it, near the bottom of 20 slang words.

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At a glance

Meaning: Short for 캘린더 박제, “pinning it to the calendar.” Saving a plan or important date in your calendar — usually a phone app — so you won't forget.
Origin: Online, 박제 (“taxidermy”) means screenshotting something to keep it forever. The word grew out of managing schedules in smartphone calendar apps (Edaily).
Usage: Say “캘박할게” to lock in a plan; tease a friend who forgot with “didn't you 캘박?” (Money Today).
Awareness: In a 2026 Now&Survey poll of 1,002 adults, only 15.0% knew the meaning — near the bottom of 20 slang words (Herald Economy).

Sunday evening: a daughter hangs up on a friend with a cheerful “Yep, 캘박!” Her mom, listening from the living room, wonders what exactly her daughter is planning to 박. The people are made up; every fact in the conversation has a source.

Meaning

What does 캘박 (kaelbak) mean? A 24-year-old daughter explains

Mom (54)Jiwon, did you just say 캘박? What kind of 박? 수박, watermelon? 호박, pumpkin?
Jiwon (24)Lol, neither. It's short for 캘린더 박제 — pinning something to your calendar. Saving a plan in your phone calendar. I just 캘박'd next Saturday.
Mom (54)박제? Like taxidermy, in a museum? Why would you stuff a plan?
Jiwon (24)Online, 박제 means screenshotting something to keep it forever. If someone's words get screenshotted, they've been 박제'd. Edaily's slang column explains it that way too. We just do it to the calendar.
Mom (54)You could just say you wrote it on the calendar. I circle things in red on the fridge calendar.
Jiwon (24)That's your version of 캘박. But 캘박 is like a stamp that says “I'm really not forgetting this.” “Let's grab a meal sometime” is just talk; “I'll 캘박 it” is a real plan.
Mom (54)Oh, I like that. So what happens if you forget?
Jiwon (24)You get teased: “Didn't you 캘박?” It's even in a Money Today reporter's column — the reporter hoped the National Assembly, after missing a deadline for redrawing electoral districts, would never have to hear “didn't you 캘박?”
Mom (54)Even the National Assembly. I bet none of my friends know it, though.
Jiwon (24)True. In a survey Herald Economy reported on Hangul Day this year, only 15.0% of 1,002 adults knew what 캘박 meant. Almost last out of 20 slang words.
Mom (54)Celebrities probably don't know it either.
Jiwon (24)In 2022, Sooyoung from Girls' Generation answered a slang quiz on a JTBC show by saying 캘박 meant “California shaman.” That's in the Edaily column too.
Mom (54)California shaman is funnier. Anyway, Jiwon — Grandma's birthday next month. 캘박 that too.
Jiwon (24)…Mom, you just used it perfectly. 캘박 done.

캘박

Short for 캘린더 박제: saving a plan or important date in your calendar (usually a phone app) and committing to it. Also used to confirm that plans are set.

In Korean: '캘린더 박제'의 줄임말로, 약속이나 중요한 일정을 캘린더에 저장해 꼭 지키겠다는 뜻.

다음 주 금요일 7시 강남역, 캘박 완료!Next Friday, 7 p.m., Gangnam Station — 캘박 done!Locking in plans in the group chat
야 오늘 우리 약속이었잖아. 캘박 안 했냐?Hey, we had plans today. Didn't you 캘박?To a friend who forgot
콘서트 티켓팅 날짜는 무조건 캘박해 둬야 해You absolutely have to 캘박 the concert ticketing date.A fan club announcement
단풍 절정이 다음 주래. 바로 캘박Fall colors peak next week, apparently. 캘박, right now.Planning an autumn hike
캘박? 캘리포니아에서 박수 치라는 건가?캘박? Clap in California?Dad (a wrong answer in the Sooyoung tradition)

Why it caught on

Why did 캘박 come about?

Edaily says 캘박 grew out of the habit of managing schedules in smartphone calendar apps. Generations who wrote plans by hand never needed a name for it, but once tapping “save” in an app became a ritual, it got one. JoongAng Ilbo's “Millennial Trend Dictionary” introduced the word alongside 다꾸 fans — people who decorate their planners — marking important dates. In an age of empty “let's hang out sometime” promises, “I'll 캘박 it” signals that this time it's real. So even with low awareness overall, it's a sturdy word among the people who use it.

FAQ

캘박 (kaelbak): frequently asked questions

Q. What does 캘박 (kaelbak) mean?

It's short for 캘린더 박제, “pinning it to the calendar”: saving a plan or important date in your calendar, usually a phone app, so you won't forget. It's also a way of confirming plans.

Q. What does the 박제 in 캘박 mean?

Not taxidermy, its dictionary meaning. Online, 박제 means screenshotting words or a screen to keep them forever; 캘박 does that with your calendar (Edaily).

Q. Where does 캘박 come from?

From the habit of managing schedules in smartphone calendar apps. Who first used it, and when, isn't confirmed; it was showing up in slang quizzes and articles by around 2022.

Q. What's 캘박 in English?

“Pin it to the calendar,” “put it in my calendar” or “it's locked in” come close. To capture the sense of confirming plans, “It's a date — calendar's updated” works too.

Q. Is 캘박 an app?

There are scheduling apps and services named 캘박, but the slang isn't about any one app — it's the act of saving plans in whatever calendar you use.

So 캘박 is how you pin a plan to your calendar and stamp it “for real this time.” For the record, Grandma's birthday is now pinned to both Jiwon's calendar and the fridge calendar. A double 캘박. If you have a sharper definition, add it to the 캘박 entry in the dictionary.

Sources

See ‘캘박’ in the dictionary — more definitions, examples, and your own take.

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