2011 year, Official Korean Holidays
1 Jan 2011 : New year’s day
2 Feb ~4 Feb 2011 : Seolnal
1 Mar 2011 : Independence Movement day
5 May 2011 : Childrens’day
10 May 2011 : Buddha’s Birthday
6 Jun 2011 : Memorial day
15 Aug 2011 : Liberation Day
11 Sep ~ 13 Sep 2011 : Chuseok
3 OCt 2011 : National Foundation day
25 Dec 2011 : Christmas
Most office and bank will be closed, but most restaurant, shopping store, palace, and museums will be opened.
Specially 1 May 2010 is not official holiday, but most office, bankand post office will be closed. because 1 May is for labor day, labor got day off.