Today is 64th Liberation Day / Gwangbokjeol in Korea. It celebrates the independence of Korea from Japan's authority since August 15, 1945. This day is the same day as the Victory over Japan Day(V-J).
On this day, many Korean families put Korean flag up high to express their thankfulness for those who suffered their life to free Korea, and also happiness for the independence of Korea. Many ceremonies are held in various places to celebrate this holiday.