Zamboanga Sibugay Day, observed in the Philippine province of Zamboanga Sibugay, is celebrated every February 24 to commemorate the province's founding anniversary. This special non-working holiday marks the establishment of Zamboanga Sibugay as a separate province from Zamboanga del Sur, following a plebiscite held on February 22, 2001, in which 70% of voters approved its creation. The province, with Ipil as its capital, has historical roots dating back to the Spanish colonization of the Zamboanga Peninsula in 1569 and played a significant role in the Spanish-Moro conflict. The day serves as a reminder of the province's journey to independence and its eventual establishment in the early 2000s. Celebrations may include local events and activities that reflect the cultural heritage of the region.