Foundation Day

Japan’s Foundation Day, known as Kenkoku Kinen no Hi (建国記念の日), is observed annually on February 11; in 2026, it falls on Wednesday. The holiday is intended to commemorate the founding of Japan and to cultivate appreciation for the nation, although it does not mark a verifiable historical date in the modern sense. Its date derives from the traditional account that Emperor Jimmu, regarded in mythology as Japan’s first emperor, ascended the throne on the first day of the first month of the lunar calendar in 660 BCE. When converted to the Gregorian calendar, this date became February 11.

Foundation Day is generally a quiet national holiday rather than a festival centered on elaborate public rituals. Government offices, schools, and many businesses close, while people may spend the day relaxing at home, visiting family, taking short trips, or enjoying seasonal outings. Japanese flags may be displayed outside homes and public buildings, and some local organizations or nationalist groups hold commemorative gatherings, speeches, or small ceremonies. Shinto shrines may also offer prayers for the prosperity and peace of Japan, although there is no single nationwide ceremony required by custom.