national flag consisting of horizontal stripes of blue and red with a white hoist triangle incorporating a golden sun and three stars. The flag's width-to-length ratio is generally 1 to 2.

The 1898 overthrow of Spanish authority by the United States led Filipinos to believe that their country's independence, proclaimed on June 12, 1898, was guaranteed. A national flag quite different from the revolutionary banners used a few years before was adopted. At the hoist was a white triangle, symbolic of liberty and probably derived from Masonic symbolism. It bore a golden sun and three golden stars, standing for the three main areas in the Philippines—the Luzon group of islands in the north, the Visayan group in the south, and the main southern island of Mindanao. The eight sun rays were for the provinces where the original anti-Spanish revolt had broken out. The remainder of the flag consisted of horizontal stripes of blue (for the willingness to sacrifice oneself for freedom) over red (for courage).

The first republic was finally suppressed by the United States, and its flag was outlawed between 1907 and 1920. In 1936 the new Commonwealth of the Philippines adopted that flag in anticipation of eventual independence. Under Japanese occupation, the Philippine flag was first forbidden and then officially recognized on October 14, 1943, when the Japanese-controlled second republic was proclaimed. Filipinos opposed to Japanese rule displayed the flag with the blue stripe down and the red stripe up (i.e., they hoisted the flag upside down). Finally, the United States granted independence to the Philippines on July 4, 1946, under the 1898 flag. In 1985 President Ferdinand Marcos (Marcos, Ferdinand E.) altered the shade of blue from dark to light in the belief that the earliest flags of the republic had featured light blue. His successor, Corazon Aquino (Aquino, Corazon), reversed the change, but on September 16, 1997, in anticipation of the centennial of the original Philippine flag, the top stripe was again changed, from dark navy blue to a lighter royal blue.