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 (1521–1898)
On May 19, Emilio Aguinaldo returned to the Philippines aboard a U.S. Navy ship and on May 24 took command of Filipino forces. Filipino forces had liberated much of the country from the Spanish. On June 12, 1898 Aguinaldo issued the Philippine Declaration of Independence declaring independence from Spain. Filipino forces then laid siege to Manila, as had American forces.