Philippine Navy Day, observed in the Philippines every May 20, commemorates the founding anniversary of the Philippine Navy. The celebration has its roots in the country's naval warfare history, which dates back to pre-colonial times when indigenous peoples utilized traditional boats for various purposes, including trade and warfare. The official establishment of the Philippine Navy occurred on May 20, 1898, under General Emilio Aguinaldo, with a small fleet initially composed of captured Spanish vessels. This day honors the evolution of the navy through significant historical events, including its role during the Philippine Revolution and subsequent conflicts such as the Korean War and the Vietnam War. The observance serves to recognize the contributions of the Philippine Navy to national defense and maritime security.