Korea Tourism Organization's 2026 Chungcheong listing mentions a 50% admission discount for Sejong National Arboretum's night opening. The summary does not establish the specific nights, hours or expiry date, so this guide does not imply nightly eligibility. Night opening may have different greenhouse access and booking conditions from daytime admission. Check the arboretum's current schedule, permitted areas, tickets, closures and return transport directly.