Philippine Declaration of Independence
Following the end of World War II, the United States granted independence to the Philippines on 4 July 1946 via the Treaty of Manila. July 4 was observed in the Philippines as "Independence Day" until August 4, 1964 when, upon the advice of historians and the urging of nationalists, President Diosdado Macapagal signed into law Republic Act No. 4166 designating June 12 as the country's "Independence Day". June 12 had previously been observed as "Flag Day" and many government buildings are urged to display the Philippine Flag in their offices.
Philippine–American War
The Jones Act, passed by the U.S. Congress in 1916 to serve as the new organic law in the Philippines, promised eventual independence and instituted an elected Philippine senate. The Tydings–McDuffie Act (officially the Philippine Independence Act; Public Law 73-127) approved on March 24, 1934, provided for self-government of the Philippines and for Filipino independence (from the United States) after a period of ten years. World War II intervened, bringing the Japanese occupation between 1941 and 1945. In 1946, the Treaty of Manila (1946) between the governments of the U.S. and the Republic of the Philippines provided for the recognition of the independence of the Republic of the Philippines and the relinquishment of American sovereignty over the Philippine Islands.