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.
History of the Philippines (1898–1946)
Philippine independence came on July 4, 1946, with the signing of the Treaty of Manila between the governments of the United States and the Philippines. The treaty provided for the recognition of the independence of the Republic of the Philippines and the relinquishment of American sovereignty over the Philippine Islands. From 1946 to 1961, Independence Day was observed on July 4. On 12 May 1962, President Macapagal issued Presidential Proclamation No. 28, proclaiming Tuesday, June 12, 1962 as a special public holiday throughout the Philippines. In 1964, Republic Act No. 4166 changed the date of Independence Day from July 4 to June 12 and renamed the July 4 holiday as Philippine Republic Day.