Signing of the Constitution of the Commonwealth of the Philippines.

The Constitution of the Philippines is the supreme law of the Philippines. Its final draft was completed by the Constitutional Commission on October 12, 1986, and ratified by a nationwide plebiscite on February 2, 1987. The Constitution remains unamended to this day.

The Commonwealth of the Philippines was an unincorporated territory and commonwealth of the United States that existed from 1935 to 1946. It was established following the Tydings–McDuffie Act to replace the Insular Government of the Philippine Islands and was designed as a transitional administration in preparation for full Philippine independence. Its foreign affairs remained managed by the United States.