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.
Decolonisation of Asia
The Philippines unilaterally declared independence from Spain on 12 June 1898 under the leadership of President Emilio Aguinaldo, culminating the 1896 Revolution. Unbeknownst to the newly established government and the Filipino people in general, the United States of America had secretly arranged to purchase the colony along with several other possessions from Spain through the Treaty of Paris that concluded the Spanish–American War. After staging a mock battle in Manila, the Philippine–American War ensued until the Philippine government capitulated in 1902.