Day of the Foundation of the Republic is an important public holiday in North Korea celebrated annually on September 9th. The holiday marks the official declaration of the Democratic People's Republic of Korea in 1948 by its first Premier, Kim Il-sung. On this day, North Koreans commemorate the founding of their nation, which followed the end of Japanese colonial rule after World War II.

The Day of the Foundation of the Republic typically involves grand celebrations in North Korea which often showcase the country's military prowess and achievements. Parades featuring military personnel, armaments, and formations of gymnasts performing synchronised displays are common features of the holiday. There are also various cultural events, fireworks, dances, singing events and competitions among the citizens.

On a broader scale, the holiday paints a vivid picture of North Korean history and the rise of the current political regime. The significance of the Day of the Foundation of the Republic extends beyond the mere celebration of national independence to incorporate a host of historical, political, and social narratives. For North Koreans, it is a precious time to reflect on their roots, celebrate their individual and collective achievements, and pay homage to their nation's early stalwarts.