Philippine Independence Day before 1962: July 4, not June 12

Philippine Independence Day was formerly observed on July 4, the day when the United States granted the country its freedom in 1946. However, in 1962, President Diosdado Macapagal moved the celebration of independence to June 12, the date the nation declared independence from Spain in 1898.
From then on, through numerous presidential proclamations, July 4 became known as Philippine-Republic Day or more commonly, Filipino-American Friendship Day. 
Reference to this historic event can be found in one of the books at the Ortigas Foundation Library. A Republic is Born: Official Commemorative Volume on Independence Day, July 4, 1946, published in 1948 by the Joint Executive Committee for the Inauguration of the Republic of the Philippines, is a volume that extensively documented the momentous occasion. Photos of the Independence Day ceremony, including the oath-taking of newly elected officials such as President Manuel Roxas and Vice President Elpidio Quirino, are found in the book. US government officials like High Commissioner Paul McNutt, Senator Millard Tydings and General Douglas McArthur were also present. Photographs of passes to the ceremony, commemorative stamps, badges and related articles were also included.