기한 (gi-han, gihan) · 마감 (ma-gam, magam)
기한 refers to the final time by which something must be done, while 마감 emphasizes the act or state of ending or closing at that final time.
One lane per word — no nested boxes, just the gist.
The final time or period by which something must be completed or submitted
When to use
completion date, legal/official submission time, contract period, assignment submission deadline
The nuance
기한 indicates the deadline or time limit by which something must be done, commonly used in expressions like 'there is a deadline' or 'to meet the deadline'.
The moment or state when a task or work ends, or the act of closing/completing that task
When to use
work ending time, publication manuscript deadline, sales closing, event registration closing
The nuance
마감 emphasizes the act or point of finishing or closing work, used in phrases like 'closing time arrives' or 'to close/finish something'.
과제 제출 기한은 다음 주 금요일입니다.
gwa-je je-chul gi-han-eun da-eum ju geum-yo-il-ip-ni-da., gwa je je chul gi han eun da eum ju geum yo il ip ni da.
기한 indicates the final date to submit the assignment, so it is appropriate.
과제 제출 마감은 다음 주 금요일입니다.
gwa-je je-chul ma-gam-eun da-eum ju geum-yo-il-ip-ni-da., gwa je je chul ma gam eun da eum ju geum yo il ip ni da.
마감 emphasizes the closing point of submission, so it fits here.
계약서의 마감은 3월 31일까지입니다.
gye-yak-seo-ui ma-gam-eun 3wol 31il-kka-ji-ip-ni-da., gye yak seo ui ma gam eun 3wol 31il kka ji ip ni da.
The completion date of a contract should use 기한; 마감 is inappropriate here.
계약서의 기한은 3월 31일까지입니다.
gye-yak-seo-ui gi-han-eun 3wol 31il-kka-ji-ip-ni-da., gye yak seo ui gi han eun 3wol 31il kka ji ip ni da.
기한 suits indicating contract period or completion date.
출판사 원고 기한이 오늘입니다.
chul-pan-sa won-go gi-han-i o-neul-ip-ni-da., chul pan sa won go gi han i o neul ip ni da.
For manuscript submission closing time, 마감 is correct; 기한 sounds unnatural.
출판사 원고 마감이 오늘입니다.
chul-pan-sa won-go ma-gam-i o-neul-ip-ni-da., chul pan sa won go ma gam i o neul ip ni da.
마감 properly emphasizes the manuscript submission deadline.
이 프로젝트의 기한을 연장했습니다.
i peu-ro-jek-teu-ui gi-han-eul yeon-jang-haess-seup-ni-da., i peu ro jek teu ui gi han eul yeon jang haess seup ni da.
기한 is used when extending the deadline for project completion.
이 프로젝트의 마감을 연장했습니다.
i peu-ro-jek-teu-ui ma-gam-eul yeon-jang-haess-seup-ni-da., i peu ro jek teu ui ma gam eul yeon jang haess seup ni da.
마감 means finishing act; pairing it with extension is unnatural.
Which sentence should use '기한'?
When should you use '마감'?
Which sentence is incorrect?
