The "National Day" in South Korea refers to the opening day (개천51208;), which falls on October 3rd every year. The Kaitian Festival commemorates the day when Tan Jun founded ancient Korea in the Korean founding myth, symbolizing the origin and unity of the nation. Every year, South Korea will have one day off for the National Day holiday.
The Liberation Day (광복절) is celebrated on August 15th every year to commemorate the liberation of South Korea from Japanese colonial rule in 1945. Guangfu Festival is also an important holiday in South Korea, usually with a one-day holiday.
-Kaitian Festival: symbolizes the birth of the Korean nation, celebrating national culture and the foundation of the country.
-Liberation Day: commemorating independence and freedom, celebrating the liberation from colonial rule and the restoration of national sovereignty.
Holiday time:
Both are statutory holidays, usually with one day off.