Month Date(s) Holiday Description
January 1 New Year's Day Celebrated like in other countries. Many Koreans visit the coast or mountains to watch the first sunrise of the year.
February 9-11 Seollal Lunar New Year's Day, one of the most important holidays. Most businesses close as people visit their hometowns to be with family and enjoy traditional foods and games.
March 1 Independence Movement Day Commemorates the Declaration of Independence proclaimed on March 1, 1919, under Japanese colonization.
April 10 National Assembly Election Day Legislative election day where regional representatives are elected to the National Assembly.
May 5 Children's Day Celebrates children and hopes for their nurturing with love and care. Special events take place in parks, zoos, and other places.
May 15 Buddha's Birthday Celebrates the birth of Buddha with rituals at temples and lanterns hung along streets.
June 6 Memorial Day Honors soldiers and civilians who died for the country. The largest ceremony is at the National Cemetery in Seoul.
August 15 Liberation Day Commemorates Japan's surrender in 1945 and Korea's subsequent liberation.
September 16-18 Chuseok Korean Thanksgiving Day, a major traditional holiday to celebrate the harvest. Families gather for memorial rituals called charye.
October 3 National Foundation Day Commemorates the founding of the Korean nation by the legendary god-king Dangun.
October 9 Hangeul Day Celebrates the creation of Hangeul, Korea's native alphabet, proclaimed by the publication of Hunminjeongeum in 1446.
December 25 Christmas Observed as a national holiday with festive decorations like Christmas trees and lights seen all over Korea.

Source: https://english.visitkorea.or.kr/svc/contents/contentsView.do?vcontsId=140038&menuSn=372