Zamboanga del Norte Day, or Araw ng Zamboanga del Norte, is observed in the Philippine province of Zamboanga del Norte every June 6 to commemorate the province's founding anniversary. This special non-working holiday features ceremonies, cultural events, and various celebratory activities. Zamboanga del Norte, the largest province on the Zamboanga Peninsula, has a rich history that includes being inhabited by the Subanen people and later becoming part of the Sultanate of Maguindanao in the 16th century. The province was officially established on June 6, 1952, when it was separated from Zamboanga del Sur. The capital of Zamboanga del Norte is Dipolog, following the division of the province. The holiday serves as a reminder of the region's historical significance and cultural heritage.