Philippine FlagMay 28, 1898 was the date of the very first unfurling of the Philippine flag in Imus, Cavite, following the defeat of the Spanish forces by the Philippine Revolutionary Army. Fifteen days later, on June 12, the flag was formally presented to the Filipinos.

In 1994, President Fidel V. Ramos issued Executive Order No. 179, which extended National Flag Day (May 28) over several days until June 12.

Thus, from May 28 to June 12 of every year, Filipinos are encouraged to display the Philippine national flag in all offices, agencies and instruments of government, business establishments, schools and private homes.