South Korea designated Chuseok as a public holiday in 1949 under its modern national holiday system.
The holiday’s customs are much older than the Republic of Korea. Earlier traditions included harvest celebrations, family reunions, ancestral rites, grave visits, and communal entertainment. The 1949 designation gave Chuseok formal status in the new South Korean state.
Its legal treatment changed over time. The holiday was later expanded to a three-day public holiday, covering the day before Chuseok, the main festival day, and the day after. This arrangement reflects the practical importance of long-distance family travel.
The 1949 date refers to modern public-holiday designation, not the origin of the festival. Chuseok’s historical roots are commonly connected with older Korean harvest customs and the Silla-era Gabae tradition.