National Statistics Day, or Hari Statistik Nasional, is observed in Indonesia every September 26. This day commemorates the founding of Statistics Indonesia (BPS), a non-departmental government agency responsible for conducting statistical surveys and analyzing data. The origins of the state statistics agency date back to February 1920, when the Statistical Office was established in Bogor during the Dutch colonial period. Following various transformations, the current BPS was officially founded on September 26, 1960, when the Law on Statistics was promulgated. On this day, BPS organizes festive events and activities at its headquarters and regional offices to celebrate its 15,000 employees, which may include formal ceremonies, seminars, and informal gatherings such as sports and concerts. The holiday emphasizes the importance of statistics and encourages public participation in statistical surveys.