Independence Day was formerly celebrated on July 4, the date of the
Philippine independence from the United States in 1946 deliberately selected as it is also
American Independence Day. On May 12, 1962,
President Diosdado Macapagal issued Presidential Proclamation No. 28, which declared Tuesday, June 12 a special public holiday throughout the Philippines, "... in commemoration of our people's declaration of their inherent and inalienable right to freedom and independence." On August 4, 1964, Republic Act No. 4166 renamed the July 4 holiday as "
Philippine Republic Day", proclaimed June 12 as "Philippine Independence Day", and enjoined all citizens of the Philippines to observe the latter with befitting rites. In 1955, President
Ramón Magsaysay issued Presidential Proclamation No. 212, s. 1955, which established the observance of Philippine–American Day every November 15, the anniversary of the 1935 inauguration of the
Commonwealth of the Philippines. Sometime under President
Ferdinand Marcos, Philippine–American Day was renamed "Philippine–American Friendship Day" and moved to July 4, overshadowing the observance of the date as Republic Day. After the
Third Republic and the abolition of the
1935 Constitution under
Martial Law, it was impolitic to remind the nation of the old republic. This is why, when President Marcos issued Presidential Proclamation No. 2346 s. 1984, reference was made to Philippine–American Friendship Day, which was relegated to a working holiday without mention of Republic Day. ==Nationwide observance==