Day Date Month Holiday
Tuesday 1 Jan New Year's Day
Monday 4 Feb Seollal (New Year's Day by the lunar)
Tuesday 5 Feb Seollal (New Year's Day by the lunar)
Wednesday 6 Feb Seollal (New Year's Day by the lunar)
Friday 1 Mar Independence Movement Day
Wednesday 1 May Labor Day
Monday 6 May Substitution Holiday
Thursday 6 Jun Memorial Day
Thursday 15 Aug Liberation Day
Thursday 12 Sep Chuseok (Korean Thanksgiving)
Friday 13 Sep Chuseok (Korean Thanksgiving)
Thursday 3 Oct National Foundation Day
Wednesday 9 Oct Hangeul Proclamation Day
Wednesday 25 Dec Christmas Day
Tuesday 31 Dec End of Year Holiday
Source: http://global.krx.co.kr/contents/GLB/05/0501/0501110000/GLB0501110000.jsp