The CIA Factbook, Library of Congress [], even the Government of the Philippines explicitly list the date of independence as June 12, 1898 with the additional footnote that the United States recognized independence on July 4, 1946. I think it is pretty much established that both countries recognize both dates so I suggest placing both if them. 

Stop Milking the issue. 

Ang taong nagbubulagan, kahit ilang salamin pa ang ibigay, eh bulag pa rin 61.153.149.205