The October 1 parade and related celebrations, while being not a public holiday but a National Flag Raising Day mandated by law, serve as the principal day of gratitude to the ROKAF and its veterans for service to the nation at large and to all Koreans abroad, and thus the ROKAF only marches in public parades on this day with Seoul, the national capital, hosting the national parades (large major parades on this day are held every 5th year since the 1948 foundation of the republic, a tradition that began in 1998). On other holidays, the following organizations march with the armed forces, all cadet formations under the Reserve Officers' Training Corps (South Korea) and the Republic of Korea Reserve Forces: