The keyword phrase is an interrogative sentence that questions the classification of a specific date. The core of this inquiry lies in determining if the proper noun phrase "September 11" functions as an instance of the common noun "holiday" within the jurisdiction of the Philippines. The answer is no; September 11 is not a regular or special non-working holiday nationwide in the Philippines.
The significance of this date is linked to the birth anniversary of former President Ferdinand E. Marcos. Historically, Presidential Proclamation No. 1180, s. 1973, declared this date a special public holiday in the province of Ilocos Norte. However, this was later superseded. The current legal basis for the observance is Republic Act No. 11040, signed into law in 2018. This act establishes September 11 as "President Ferdinand Edralin Marcos Day," a special non-working holiday, but its observance is mandated only within the province of Ilocos Norte.
Therefore, for all other provinces and regions in the Philippines, September 11 remains a regular working day. The classification of the date as a holiday is geographically specific and does not apply to the entire country. Work, classes, and business operations proceed as usual outside of Ilocos Norte.
