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.
Commonwealth of the Philippines
Roxas served as the President of the Commonwealth of the Philippines in a brief period, from his subsequent election on May 28, 1946 to July 4, 1946, the scheduled date of the proclamation of Philippine Independence. Roxas prepared the groundwork for the advent of a free and independent Philippines, assisted by the Congress (reorganized May 25, 1946), with Senator José Avelino as the Senate President and Congressman Eugenio Pérez as the House of Representatives Speaker. On June 3, 1946, Roxas appeared for the first time before the joint session of the Congress to deliver his first state of the nation address. Among other things, he told the members of the Congress the grave problems and difficulties the Philippines were set to face and reported on his special trip to the U.S. — the approval for independence.