On May 12, 1962, President Diosdado Macapagal changed the celebration of Independence Day from July 4 to June 12 to honor Aguinaldo and the Revolution of 1898, rather than the establishment of the Insular Government of the Philippine Islands by the United States. Although now in poor health, Aguinaldo attended that year's Independence Day observances. On August 4, 1964, Republic Act No. 4166 officially proclaimed June 12 as the Philippine Independence Day and renamed the Fourth of July holiday to "Philippine Republic Day".