The keyword term functions as a noun phrase, with "holiday" serving as the core noun. The terms "September 11" and "Philippines" act as modifiers, specifying the date and location, respectively. As a subject of inquiry, it pertains to a specific commemorative day in the Philippines. September 11 is not a national holiday. It is observed as a special non-working holiday exclusively in the province of Ilocos Norte to commemorate the birth anniversary of former President Ferdinand E. Marcos Sr.
The legal basis for this observance is Republic Act No. 11370, signed into law on August 28, 2019. This act officially designates September 11 of every year as "President Ferdinand Edralin Marcos Day" within Ilocos Norte. The declaration of this date as a holiday has historical roots in the Marcos administration, during which it was observed nationwide. Following the end of his rule, the national observance was discontinued. The current holiday is a localized reinstatement, specific only to the former president's home province.
In practical terms, this means that for the entire country, except for the province of Ilocos Norte, September 11 is a regular working day. In Ilocos Norte, however, the designation as a special non-working holiday means that local government offices and public schools are closed, and eligible private sector employees are entitled to holiday pay as stipulated by labor laws. This distinction is crucial for understanding the limited geographic scope and civic nature of the observance.
