2020 year, Official Korean Holidays
1 Jan : New year’s day
24 Jan ~ 27 Jan : Seollal
1 Mar : Independence Movement day
15 Apr : 21st National Assembly election
30 Apr : Buddha’s Birthday
5 May : Childrens’day
6 Jun : Memorial day
15 Aug : Liberation Day
30 Sep ~ 2 Oct : Chuseok
3 Oct : National Foundation day
9 Oct : Hangeul Proclamation Day
25 Dec : Christmas
Most office and bank will be closed, but most restaurant, shopping store, palace, and museums will be opened.
Specially 1st of May is not official holiday, but most office, bank and post office will be closed. because 1st of May is for labor day, labor got day off.