November 3rd, Students' Day.

Gwangju politicians at the memorial tower on the campus of Gwangju Jeil High School mark Students' Day (학생의날) , which was designated to commemorate the start of the Gwangju Students' Independence Movement (광주학생항일운동) of 1929. It was, says a now-defunct page on the Gwangju Student Independence Movement Memorial Hall website:

a typical national resistance movement against the cruel rule of Japanese colonialism. Its size, the influence it exerted and its historical significance were comparable with that of the huge "Samil Independence Movement".

Gwangju's tourism webpage said in 2009:

In 1953, the government designated Nov. 3rd as "Student Day"in commemoration of the Gwangju Students'Independence Movement and a memorial monument was established in Gwangju Seo Middle School and Il High School in 1954. The day was at one point abolished by the autocratic government before finally being named as "Students'Independence Memorial Day"and elevated to a nationwide memorial day in 2006.

From the 1954 dedication ceremony, via this site.