Thursday 01 Jan New Year's Day
Wednesday 18 Feb Seollal Holiday Day 1
Thursday 19 Jan Seollal Holiday Day 2
Friday 20 Feb Seollal Holiday Day 3
Sunday 01 Mar Independence Movement day
Tuesday 05 May Children's Day
Monday 25 May Buddha's Birthday
Saturday 06 Jun Memorial Day
Saturday 15 Aug Liberation Day
Saturday 26 Sep Mid-Autumn Festival Day 1
Sunday 27 Sep Mid-Autumn Festival Day 2
Monday 28 Sep Mid-Autumn Festival Day 3
Tuesday 29 Sep Mid-Autumn Festival Day 4
Saturday 03 Oct National Foundation Day
Friday 09 Oct Hangeul Proclamation Day
Friday 25 Dec Christmas Day
Source: https://www.timeanddate.com/holidays/south-korea/2015#!hol=9