Sejong holds the Sejong Hangeul Festival, a free celebration of King Sejong and the Korean alphabet that opens every year on Hangeul Day, 9 October, and runs for three or four days in Sejong Lake Park and Sejong Central Park, with drone shows and fireworks. Its neighbours add more: Daejeon holds a science festival in mid-April; Gongju, to the south-west, shares the Baekje Cultural Festival with Buyeo from late September to mid-October; and Cheongju, east of Osong Station, hosts the Craft Biennale every two years from early September. All three are nearby.
On now, coming up and expected
The Sejong Hangeul Festival (세종한글축제, called the Sejong Festival until 2024) is Sejong City's free festival of King Sejong and the Korean alphabet, opening every year on Hangeul Day, 9 October, in Sejong Lake Park and Sejong Central Park. The 2026 edition ran 9–11 October, 10:00–21:00, with a Black Eagles air show, the Hangeul Run, drone shows and fireworks.
These come straight from the Korea Tourism Organization’s public festival database. We have not checked them against the organizer, so dates and details can be wrong or out of date. Confirm on the official page before you book.