Araw ng Kalayaan, also known as Araw ng Kasarinlan – Philippine Independence Day, observed on June 12, commemorating the Philippine Declaration of Independence from Spain on June 12, 1898. Since 1962, it has been the Philippines National Day.
Prior to 1964, June 12 had been observed as Flag Day in the country. In 1965 President Diosdado Macapagal issued Proclamation No. 374, which moved National Flag Day to May 28 (the date the Philippine Flag was first flown in battle in Alapan, Imus, Cavite in 1898).
In 1994, President Fidel V. Ramos issued Executive Order No. 179, extending the celebration period extended period to range from May 28 to Philippine Independence Day on June 12, ordering government departments, agencies, offices, government owned and controlled corporations, state agencies, and local government units, and even private establishments, to prominently display the National Flag in all public buildings, government institutions, and official residences during this period, and ordering the Department of Education, in coordination with the private sector, non-government organizations, and socio-civic groups, to enjoin the prominent display of the National Flag in all public squares and, whenever practicable, in all private buildings and homes in celebration of national independence.
credits to: wikipedia/atbp.ph