Only Offices and Banks Close! Hangeul Day 2026 Falls on a Friday—October’s Second Three-Day Weekend (Oct 9–11), and Gwanghwamun Becomes a Festival
October 9 is Hangeul Day, and in 2026 it lands on a Friday, so Oct 9–11 is the month’s second three-day weekend. Here’s the thing: unlike Chuseok, commerce runs as normal, while Gwanghwamun Square and the free National Hangeul Museum turn into a festival. Seoulog covers the crowds, the closures and an Insadong calligraphy hour, in three parts.